* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6:
V4L/DVB (13372): staging/go7007: fix mutex function usage for s2250
staging/go7007: Fix compilation by re-adding the missing s2250-loader.h
V4L/DVB (13530): Fix wrong parameter order in memset
V4L/DVB (13481): sh_mobile_ceu_camera: fix compile warning
V4L/DVB (13436): cxusb: Fix hang on DViCO FusionHDTV DVB-T Dual Digital 4 (rev 1)
V4L/DVB (13412): SMS_SIANO_MDTV should depend on HAS_DMA
V4L/DVB (13372a): MAINTAINERS: addition of gspca_gl860 driver
V4L/DVB (13371): davinci: remove stray duplicate config pointer
V4L/DVB (13366): em28xx: fix Reddo DVB-C USB TV Box GPIO
V4L/DVB (13345): soc-camera: sh_mobile_ceu_camera: call pm_runtime_disable
V4L/DVB (13344): soc-camera: properly initialise the device object when reusing
V4L/DVB (13343): v4l: add more missing linux/sched.h includes
V4L/DVB (13321): radio-gemtek-pci: fix double mutex_lock
*.elf
*.bin
*.gz
+*.bz2
*.lzma
*.patch
*.gcno
8. Mailing list
---------------
-There are several frame buffer device related mailing lists at SourceForge:
- - linux-fbdev-announce@lists.sourceforge.net, for announcements,
- - linux-fbdev-user@lists.sourceforge.net, for generic user support,
- - linux-fbdev-devel@lists.sourceforge.net, for project developers.
+There is a frame buffer device related mailing list at kernel.org:
+linux-fbdev@vger.kernel.org.
Point your web browser to http://sourceforge.net/projects/linux-fbdev/ for
subscription information and archive browsing.
neg=N Number of negative lookups made
pos=N Number of positive lookups made
crt=N Number of objects created by lookup
+ tmo=N Number of lookups timed out and requeued
Updates n=N Number of update cookie requests seen
nul=N Number of upd reqs given a NULL parent
run=N Number of upd reqs granted CPU time
ok=N Number of successful alloc reqs
wt=N Number of alloc reqs that waited on lookup completion
nbf=N Number of alloc reqs rejected -ENOBUFS
+ int=N Number of alloc reqs aborted -ERESTARTSYS
ops=N Number of alloc reqs submitted
owt=N Number of alloc reqs waited for CPU time
+ abt=N Number of alloc reqs aborted due to object death
Retrvls n=N Number of retrieval (read) requests seen
ok=N Number of successful retr reqs
wt=N Number of retr reqs that waited on lookup completion
oom=N Number of retr reqs failed -ENOMEM
ops=N Number of retr reqs submitted
owt=N Number of retr reqs waited for CPU time
+ abt=N Number of retr reqs aborted due to object death
Stores n=N Number of storage (write) requests seen
ok=N Number of successful store reqs
agn=N Number of store reqs on a page already pending storage
oom=N Number of store reqs failed -ENOMEM
ops=N Number of store reqs submitted
run=N Number of store reqs granted CPU time
+ pgs=N Number of pages given store req processing time
+ rxd=N Number of store reqs deleted from tracking tree
+ olm=N Number of store reqs over store limit
+ VmScan nos=N Number of release reqs against pages with no pending store
+ gon=N Number of release reqs against pages stored by time lock granted
+ bsy=N Number of release reqs ignored due to in-progress store
+ can=N Number of page stores cancelled due to release req
Ops pend=N Number of times async ops added to pending queues
run=N Number of times async ops given CPU time
enq=N Number of times async ops queued for processing
+ can=N Number of async ops cancelled
+ rej=N Number of async ops rejected due to object lookup/create failure
dfr=N Number of async ops queued for deferred release
rel=N Number of async ops released
gc=N Number of deferred-release async ops garbage collected
+ CacheOp alo=N Number of in-progress alloc_object() cache ops
+ luo=N Number of in-progress lookup_object() cache ops
+ luc=N Number of in-progress lookup_complete() cache ops
+ gro=N Number of in-progress grab_object() cache ops
+ upo=N Number of in-progress update_object() cache ops
+ dro=N Number of in-progress drop_object() cache ops
+ pto=N Number of in-progress put_object() cache ops
+ syn=N Number of in-progress sync_cache() cache ops
+ atc=N Number of in-progress attr_changed() cache ops
+ rap=N Number of in-progress read_or_alloc_page() cache ops
+ ras=N Number of in-progress read_or_alloc_pages() cache ops
+ alp=N Number of in-progress allocate_page() cache ops
+ als=N Number of in-progress allocate_pages() cache ops
+ wrp=N Number of in-progress write_page() cache ops
+ ucp=N Number of in-progress uncache_page() cache ops
+ dsp=N Number of in-progress dissociate_pages() cache ops
(*) /proc/fs/fscache/histogram
jiffy range covered, and the SECS field the equivalent number of seconds.
+===========
+OBJECT LIST
+===========
+
+If CONFIG_FSCACHE_OBJECT_LIST is enabled, the FS-Cache facility will maintain a
+list of all the objects currently allocated and allow them to be viewed
+through:
+
+ /proc/fs/fscache/objects
+
+This will look something like:
+
+ [root@andromeda ~]# head /proc/fs/fscache/objects
+ OBJECT PARENT STAT CHLDN OPS OOP IPR EX READS EM EV F S | NETFS_COOKIE_DEF TY FL NETFS_DATA OBJECT_KEY, AUX_DATA
+ ======== ======== ==== ===== === === === == ===== == == = = | ================ == == ================ ================
+ 17e4b 2 ACTV 0 0 0 0 0 0 7b 4 0 8 | NFS.fh DT 0 ffff88001dd82820 010006017edcf8bbc93b43298fdfbe71e50b57b13a172c0117f38472, e567634700000000000000000000000063f2404a000000000000000000000000c9030000000000000000000063f2404a
+ 1693a 2 ACTV 0 0 0 0 0 0 7b 4 0 8 | NFS.fh DT 0 ffff88002db23380 010006017edcf8bbc93b43298fdfbe71e50b57b1e0162c01a2df0ea6, 420ebc4a000000000000000000000000420ebc4a0000000000000000000000000e1801000000000000000000420ebc4a
+
+where the first set of columns before the '|' describe the object:
+
+ COLUMN DESCRIPTION
+ ======= ===============================================================
+ OBJECT Object debugging ID (appears as OBJ%x in some debug messages)
+ PARENT Debugging ID of parent object
+ STAT Object state
+ CHLDN Number of child objects of this object
+ OPS Number of outstanding operations on this object
+ OOP Number of outstanding child object management operations
+ IPR
+ EX Number of outstanding exclusive operations
+ READS Number of outstanding read operations
+ EM Object's event mask
+ EV Events raised on this object
+ F Object flags
+ S Object slow-work work item flags
+
+and the second set of columns describe the object's cookie, if present:
+
+ COLUMN DESCRIPTION
+ =============== =======================================================
+ NETFS_COOKIE_DEF Name of netfs cookie definition
+ TY Cookie type (IX - index, DT - data, hex - special)
+ FL Cookie flags
+ NETFS_DATA Netfs private data stored in the cookie
+ OBJECT_KEY Object key } 1 column, with separating comma
+ AUX_DATA Object aux data } presence may be configured
+
+The data shown may be filtered by attaching the a key to an appropriate keyring
+before viewing the file. Something like:
+
+ keyctl add user fscache:objlist <restrictions> @s
+
+where <restrictions> are a selection of the following letters:
+
+ K Show hexdump of object key (don't show if not given)
+ A Show hexdump of object aux data (don't show if not given)
+
+and the following paired letters:
+
+ C Show objects that have a cookie
+ c Show objects that don't have a cookie
+ B Show objects that are busy
+ b Show objects that aren't busy
+ W Show objects that have pending writes
+ w Show objects that don't have pending writes
+ R Show objects that have outstanding reads
+ r Show objects that don't have outstanding reads
+ S Show objects that have slow work queued
+ s Show objects that don't have slow work queued
+
+If neither side of a letter pair is given, then both are implied. For example:
+
+ keyctl add user fscache:objlist KB @s
+
+shows objects that are busy, and lists their object keys, but does not dump
+their auxiliary data. It also implies "CcWwRrSs", but as 'B' is given, 'b' is
+not implied.
+
+By default all objects and all fields will be shown.
+
+
=========
DEBUGGING
=========
Furthermore, note that this does not cancel the asynchronous read or write
operation started by the read/alloc and write functions, so the page
-invalidation and release functions must use:
+invalidation functions must use:
bool fscache_check_page_write(struct fscache_cookie *cookie,
struct page *page);
to wait for it to finish if it is.
+When releasepage() is being implemented, a special FS-Cache function exists to
+manage the heuristics of coping with vmscan trying to eject pages, which may
+conflict with the cache trying to write pages to the cache (which may itself
+need to allocate memory):
+
+ bool fscache_maybe_release_page(struct fscache_cookie *cookie,
+ struct page *page,
+ gfp_t gfp);
+
+This takes the netfs cookie, and the page and gfp arguments as supplied to
+releasepage(). It will return false if the page cannot be released yet for
+some reason and if it returns true, the page has been uncached and can now be
+released.
+
+To make a page available for release, this function may wait for an outstanding
+storage request to complete, or it may attempt to cancel the storage request -
+in which case the page will not be stored in the cache this time.
+
+
==========================
INDEX AND DATA FILE UPDATE
==========================
Operations of both types may sleep during execution, thus tying up the thread
loaned to it.
+A further class of work item is available, based on the slow work item class:
+
+ (*) Delayed slow work items.
+
+These are slow work items that have a timer to defer queueing of the item for
+a while.
+
THREAD-TO-CLASS ALLOCATION
--------------------------
Firstly, a module or subsystem wanting to make use of slow work items must
register its interest:
- int ret = slow_work_register_user();
+ int ret = slow_work_register_user(struct module *module);
-This will return 0 if successful, or a -ve error upon failure.
+This will return 0 if successful, or a -ve error upon failure. The module
+pointer should be the module interested in using this facility (almost
+certainly THIS_MODULE).
Slow work items may then be set up by:
slow_work_init(&myitem, &myitem_ops);
+ or:
+
+ delayed_slow_work_init(&myitem, &myitem_ops);
+
or:
vslow_work_init(&myitem, &myitem_ops);
int ret = slow_work_enqueue(&myitem);
This will return a -ve error if the thread pool is unable to gain a reference
-on the item, 0 otherwise.
+on the item, 0 otherwise, or (for delayed work):
+
+ int ret = delayed_slow_work_enqueue(&myitem, my_jiffy_delay);
The items are reference counted, so there ought to be no need for a flush
-operation. When all a module's slow work items have been processed, and the
+operation. But as the reference counting is optional, means to cancel
+existing work items are also included:
+
+ cancel_slow_work(&myitem);
+ cancel_delayed_slow_work(&myitem);
+
+can be used to cancel pending work. The above cancel function waits for
+existing work to have been executed (or prevent execution of them, depending
+on timing).
+
+
+When all a module's slow work items have been processed, and the
module has no further interest in the facility, it should unregister its
interest:
- slow_work_unregister_user();
+ slow_work_unregister_user(struct module *module);
+
+The module pointer is used to wait for all outstanding work items for that
+module before completing the unregistration. This prevents the put_ref() code
+from being taken away before it completes. module should almost certainly be
+THIS_MODULE.
+
+
+================
+HELPER FUNCTIONS
+================
+
+The slow-work facility provides a function by which it can be determined
+whether or not an item is queued for later execution:
+
+ bool queued = slow_work_is_queued(struct slow_work *work);
+
+If it returns false, then the item is not on the queue (it may be executing
+with a requeue pending). This can be used to work out whether an item on which
+another depends is on the queue, thus allowing a dependent item to be queued
+after it.
+
+If the above shows an item on which another depends not to be queued, then the
+owner of the dependent item might need to wait. However, to avoid locking up
+the threads unnecessarily be sleeping in them, it can make sense under some
+circumstances to return the work item to the queue, thus deferring it until
+some other items have had a chance to make use of the yielded thread.
+
+To yield a thread and defer an item, the work function should simply enqueue
+the work item again and return. However, this doesn't work if there's nothing
+actually on the queue, as the thread just vacated will jump straight back into
+the item's work function, thus busy waiting on a CPU.
+
+Instead, the item should use the thread to wait for the dependency to go away,
+but rather than using schedule() or schedule_timeout() to sleep, it should use
+the following function:
+
+ bool requeue = slow_work_sleep_till_thread_needed(
+ struct slow_work *work,
+ signed long *_timeout);
+
+This will add a second wait and then sleep, such that it will be woken up if
+either something appears on the queue that could usefully make use of the
+thread - and behind which this item can be queued, or if the event the caller
+set up to wait for happens. True will be returned if something else appeared
+on the queue and this work function should perhaps return, of false if
+something else woke it up. The timeout is as for schedule_timeout().
+
+For example:
+
+ wq = bit_waitqueue(&my_flags, MY_BIT);
+ init_wait(&wait);
+ requeue = false;
+ do {
+ prepare_to_wait(wq, &wait, TASK_UNINTERRUPTIBLE);
+ if (!test_bit(MY_BIT, &my_flags))
+ break;
+ requeue = slow_work_sleep_till_thread_needed(&my_work,
+ &timeout);
+ } while (timeout > 0 && !requeue);
+ finish_wait(wq, &wait);
+ if (!test_bit(MY_BIT, &my_flags)
+ goto do_my_thing;
+ if (requeue)
+ return; // to slow_work
===============
===============
Each work item requires a table of operations of type struct slow_work_ops.
-All members are required:
+Only ->execute() is required; the getting and putting of a reference and the
+describing of an item are all optional.
(*) Get a reference on an item:
This should perform the work required of the item. It may sleep, it may
perform disk I/O and it may wait for locks.
+ (*) View an item through /proc:
+
+ void (*desc)(struct slow_work *work, struct seq_file *m);
+
+ If supplied, this should print to 'm' a small string describing the work
+ the item is to do. This should be no more than about 40 characters, and
+ shouldn't include a newline character.
+
+ See the 'Viewing executing and queued items' section below.
+
==================
POOL CONFIGURATION
is bounded to between 1 and one fewer than the number of active threads.
This ensures there is always at least one thread that can process very
slow work items, and always at least one thread that won't.
+
+
+==================================
+VIEWING EXECUTING AND QUEUED ITEMS
+==================================
+
+If CONFIG_SLOW_WORK_PROC is enabled, a proc file is made available:
+
+ /proc/slow_work_rq
+
+through which the list of work items being executed and the queues of items to
+be executed may be viewed. The owner of a work item is given the chance to
+add some information of its own.
+
+The contents look something like the following:
+
+ THR PID ITEM ADDR FL MARK DESC
+ === ===== ================ == ===== ==========
+ 0 3005 ffff880023f52348 a 952ms FSC: OBJ17d3: LOOK
+ 1 3006 ffff880024e33668 2 160ms FSC: OBJ17e5 OP60d3b: Write1/Store fl=2
+ 2 3165 ffff8800296dd180 a 424ms FSC: OBJ17e4: LOOK
+ 3 4089 ffff8800262c8d78 a 212ms FSC: OBJ17ea: CRTN
+ 4 4090 ffff88002792bed8 2 388ms FSC: OBJ17e8 OP60d36: Write1/Store fl=2
+ 5 4092 ffff88002a0ef308 2 388ms FSC: OBJ17e7 OP60d2e: Write1/Store fl=2
+ 6 4094 ffff88002abaf4b8 2 132ms FSC: OBJ17e2 OP60d4e: Write1/Store fl=2
+ 7 4095 ffff88002bb188e0 a 388ms FSC: OBJ17e9: CRTN
+ vsq - ffff880023d99668 1 308ms FSC: OBJ17e0 OP60f91: Write1/EnQ fl=2
+ vsq - ffff8800295d1740 1 212ms FSC: OBJ16be OP4d4b6: Write1/EnQ fl=2
+ vsq - ffff880025ba3308 1 160ms FSC: OBJ179a OP58dec: Write1/EnQ fl=2
+ vsq - ffff880024ec83e0 1 160ms FSC: OBJ17ae OP599f2: Write1/EnQ fl=2
+ vsq - ffff880026618e00 1 160ms FSC: OBJ17e6 OP60d33: Write1/EnQ fl=2
+ vsq - ffff880025a2a4b8 1 132ms FSC: OBJ16a2 OP4d583: Write1/EnQ fl=2
+ vsq - ffff880023cbe6d8 9 212ms FSC: OBJ17eb: LOOK
+ vsq - ffff880024d37590 9 212ms FSC: OBJ17ec: LOOK
+ vsq - ffff880027746cb0 9 212ms FSC: OBJ17ed: LOOK
+ vsq - ffff880024d37ae8 9 212ms FSC: OBJ17ee: LOOK
+ vsq - ffff880024d37cb0 9 212ms FSC: OBJ17ef: LOOK
+ vsq - ffff880025036550 9 212ms FSC: OBJ17f0: LOOK
+ vsq - ffff8800250368e0 9 212ms FSC: OBJ17f1: LOOK
+ vsq - ffff880025036aa8 9 212ms FSC: OBJ17f2: LOOK
+
+In the 'THR' column, executing items show the thread they're occupying and
+queued threads indicate which queue they're on. 'PID' shows the process ID of
+a slow-work thread that's executing something. 'FL' shows the work item flags.
+'MARK' indicates how long since an item was queued or began executing. Lastly,
+the 'DESC' column permits the owner of an item to give some information.
+
ATMEL LCDFB DRIVER
M: Nicolas Ferre <nicolas.ferre@atmel.com>
-L: linux-fbdev-devel@lists.sourceforge.net (moderated for non-subscribers)
+L: linux-fbdev@vger.kernel.org
S: Maintained
F: drivers/video/atmel_lcdfb.c
F: include/video/atmel_lcdc.h
F: drivers/net/wan/sdla.c
FRAMEBUFFER LAYER
-L: linux-fbdev-devel@lists.sourceforge.net (moderated for non-subscribers)
+L: linux-fbdev@vger.kernel.org
W: http://linux-fbdev.sourceforge.net/
S: Orphan
F: Documentation/fb/
FREESCALE IMX / MXC FRAMEBUFFER DRIVER
M: Sascha Hauer <kernel@pengutronix.de>
-L: linux-fbdev-devel@lists.sourceforge.net (moderated for non-subscribers)
+L: linux-fbdev@vger.kernel.org
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
S: Maintained
F: arch/arm/plat-mxc/include/mach/imxfb.h
F: security/integrity/ima/
IMS TWINTURBO FRAMEBUFFER DRIVER
-L: linux-fbdev-devel@lists.sourceforge.net (moderated for non-subscribers)
+L: linux-fbdev@vger.kernel.org
S: Orphan
F: drivers/video/imsttfb.c
INTEL FRAMEBUFFER DRIVER (excluding 810 and 815)
M: Sylvain Meyer <sylvain.meyer@worldonline.fr>
-L: linux-fbdev-devel@lists.sourceforge.net (moderated for non-subscribers)
+L: linux-fbdev@vger.kernel.org
S: Maintained
F: Documentation/fb/intelfb.txt
F: drivers/video/intelfb/
INTEL 810/815 FRAMEBUFFER DRIVER
M: Antonino Daplas <adaplas@gmail.com>
-L: linux-fbdev-devel@lists.sourceforge.net (moderated for non-subscribers)
+L: linux-fbdev@vger.kernel.org
S: Maintained
F: drivers/video/i810/
MATROX FRAMEBUFFER DRIVER
M: Petr Vandrovec <vandrove@vc.cvut.cz>
-L: linux-fbdev-devel@lists.sourceforge.net (moderated for non-subscribers)
+L: linux-fbdev@vger.kernel.org
S: Maintained
F: drivers/video/matrox/matroxfb_*
F: include/linux/matroxfb.h
NVIDIA (rivafb and nvidiafb) FRAMEBUFFER DRIVER
M: Antonino Daplas <adaplas@gmail.com>
-L: linux-fbdev-devel@lists.sourceforge.net (moderated for non-subscribers)
+L: linux-fbdev@vger.kernel.org
S: Maintained
F: drivers/video/riva/
F: drivers/video/nvidia/
OMAP FRAMEBUFFER SUPPORT
M: Imre Deak <imre.deak@nokia.com>
-L: linux-fbdev-devel@lists.sourceforge.net (moderated for non-subscribers)
+L: linux-fbdev@vger.kernel.org
L: linux-omap@vger.kernel.org
S: Maintained
F: drivers/video/omap/
RADEON FRAMEBUFFER DISPLAY DRIVER
M: Benjamin Herrenschmidt <benh@kernel.crashing.org>
-L: linux-fbdev-devel@lists.sourceforge.net (moderated for non-subscribers)
+L: linux-fbdev@vger.kernel.org
S: Maintained
F: drivers/video/aty/radeon*
F: include/linux/radeonfb.h
RAGE128 FRAMEBUFFER DISPLAY DRIVER
M: Paul Mackerras <paulus@samba.org>
-L: linux-fbdev-devel@lists.sourceforge.net (moderated for non-subscribers)
+L: linux-fbdev@vger.kernel.org
S: Maintained
F: drivers/video/aty/aty128fb.c
S3 SAVAGE FRAMEBUFFER DRIVER
M: Antonino Daplas <adaplas@gmail.com>
-L: linux-fbdev-devel@lists.sourceforge.net (moderated for non-subscribers)
+L: linux-fbdev@vger.kernel.org
S: Maintained
F: drivers/video/savage/
UVESAFB DRIVER
M: Michal Januszewski <spock@gentoo.org>
-L: linux-fbdev-devel@lists.sourceforge.net (moderated for non-subscribers)
+L: linux-fbdev@vger.kernel.org
W: http://dev.gentoo.org/~spock/projects/uvesafb/
S: Maintained
F: Documentation/fb/uvesafb.txt
VIA UNICHROME(PRO)/CHROME9 FRAMEBUFFER DRIVER
M: Joseph Chan <JosephChan@via.com.tw>
M: Scott Fang <ScottFang@viatech.com.cn>
-L: linux-fbdev-devel@lists.sourceforge.net (moderated for non-subscribers)
+L: linux-fbdev@vger.kernel.org
S: Maintained
F: drivers/video/via/
#define dbg(x...)
#endif
-#define KERNEL_START (KERNEL_BINARY_TEXT_START - 0x1000)
+#define KERNEL_START (KERNEL_BINARY_TEXT_START)
extern struct unwind_table_entry __start___unwind[];
extern struct unwind_table_entry __stop___unwind[];
*/
. = ALIGN(PAGE_SIZE);
data_start = .;
- EXCEPTION_TABLE(16)
-
- NOTES
/* unwind info */
.PARISC.unwind : {
__stop___unwind = .;
}
+ EXCEPTION_TABLE(16)
+ NOTES
+
/* Data */
RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE)
struct cpuinfo_x86 *c = &cpu_data(pr->id);
pr->pdc = NULL;
- if (c->x86_vendor == X86_VENDOR_INTEL)
+ if (c->x86_vendor == X86_VENDOR_INTEL ||
+ c->x86_vendor == X86_VENDOR_CENTAUR)
init_intel_pdc(pr, c);
return;
select ASYNC_CORE
select ASYNC_PQ
+config ASYNC_TX_DISABLE_PQ_VAL_DMA
+ bool
+
+config ASYNC_TX_DISABLE_XOR_VAL_DMA
+ bool
}
EXPORT_SYMBOL_GPL(async_gen_syndrome);
+static inline struct dma_chan *
+pq_val_chan(struct async_submit_ctl *submit, struct page **blocks, int disks, size_t len)
+{
+ #ifdef CONFIG_ASYNC_TX_DISABLE_PQ_VAL_DMA
+ return NULL;
+ #endif
+ return async_tx_find_channel(submit, DMA_PQ_VAL, NULL, 0, blocks,
+ disks, len);
+}
+
/**
* async_syndrome_val - asynchronously validate a raid6 syndrome
* @blocks: source blocks from idx 0..disks-3, P @ disks-2 and Q @ disks-1
size_t len, enum sum_check_flags *pqres, struct page *spare,
struct async_submit_ctl *submit)
{
- struct dma_chan *chan = async_tx_find_channel(submit, DMA_PQ_VAL,
- NULL, 0, blocks, disks,
- len);
+ struct dma_chan *chan = pq_val_chan(submit, blocks, disks, len);
struct dma_device *device = chan ? chan->device : NULL;
struct dma_async_tx_descriptor *tx;
unsigned char coefs[disks-2];
memcmp(a, a + 4, len - 4) == 0);
}
+static inline struct dma_chan *
+xor_val_chan(struct async_submit_ctl *submit, struct page *dest,
+ struct page **src_list, int src_cnt, size_t len)
+{
+ #ifdef CONFIG_ASYNC_TX_DISABLE_XOR_VAL_DMA
+ return NULL;
+ #endif
+ return async_tx_find_channel(submit, DMA_XOR_VAL, &dest, 1, src_list,
+ src_cnt, len);
+}
+
/**
* async_xor_val - attempt a xor parity check with a dma engine.
* @dest: destination page used if the xor is performed synchronously
int src_cnt, size_t len, enum sum_check_flags *result,
struct async_submit_ctl *submit)
{
- struct dma_chan *chan = async_tx_find_channel(submit, DMA_XOR_VAL,
- &dest, 1, src_list,
- src_cnt, len);
+ struct dma_chan *chan = xor_val_chan(submit, dest, src_list, src_cnt, len);
struct dma_device *device = chan ? chan->device : NULL;
struct dma_async_tx_descriptor *tx = NULL;
dma_addr_t *dma_src = NULL;
{{"_BCT", 1, ACPI_RTYPE_INTEGER}},
{{"_BDN", 0, ACPI_RTYPE_INTEGER}},
{{"_BFS", 1, 0}},
- {{"_BIF", 0, ACPI_RTYPE_PACKAGE}}, /* Fixed-length (9 Int),(4 Str) */
- {{{ACPI_PTYPE1_FIXED, ACPI_RTYPE_INTEGER, 9, ACPI_RTYPE_STRING}, 4,0}},
+ {{"_BIF", 0, ACPI_RTYPE_PACKAGE} }, /* Fixed-length (9 Int),(4 Str/Buf) */
+ {{{ACPI_PTYPE1_FIXED, ACPI_RTYPE_INTEGER, 9,
+ ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER}, 4, 0} },
{{"_BIX", 0, ACPI_RTYPE_PACKAGE}}, /* Fixed-length (16 Int),(4 Str) */
{{{ACPI_PTYPE1_FIXED, ACPI_RTYPE_INTEGER, 16, ACPI_RTYPE_STRING}, 4,
* _OSI(Linux) helps sound
* DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad R61"),
* DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T61"),
+ * T400, T500
* _OSI(Linux) has Linux specific hooks
* DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X61"),
* _OSI(Linux) is a NOP:
DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X61"),
},
},
+ {
+ .callback = dmi_enable_osi_linux,
+ .ident = "Lenovo ThinkPad T400",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T400"),
+ },
+ },
+ {
+ .callback = dmi_enable_osi_linux,
+ .ident = "Lenovo ThinkPad T500",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T500"),
+ },
+ },
{}
};
},
{
.callback = init_set_sci_en_on_resume,
+ .ident = "Hewlett-Packard Compaq Presario C700 Notebook PC",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Compaq Presario C700 Notebook PC"),
+ },
+ },
+ {
+ .callback = init_set_sci_en_on_resume,
.ident = "Hewlett-Packard Compaq Presario CQ40 Notebook PC",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
return ata_dev_classify(&tf);
}
-static int sata_fsl_prereset(struct ata_link *link, unsigned long deadline)
-{
- /* FIXME: Never skip softreset, sata_fsl_softreset() is
- * combination of soft and hard resets. sata_fsl_softreset()
- * needs to be splitted into soft and hard resets.
- */
- return 0;
-}
-
-static int sata_fsl_softreset(struct ata_link *link, unsigned int *class,
+static int sata_fsl_hardreset(struct ata_link *link, unsigned int *class,
unsigned long deadline)
{
struct ata_port *ap = link->ap;
- struct sata_fsl_port_priv *pp = ap->private_data;
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
- int pmp = sata_srst_pmp(link);
u32 temp;
- struct ata_taskfile tf;
- u8 *cfis;
- u32 Serror;
int i = 0;
unsigned long start_jiffies;
- DPRINTK("in xx_softreset\n");
-
- if (pmp != SATA_PMP_CTRL_PORT)
- goto issue_srst;
+ DPRINTK("in xx_hardreset\n");
try_offline_again:
/*
if (temp & ONLINE) {
ata_port_printk(ap, KERN_ERR,
- "Softreset failed, not off-lined %d\n", i);
+ "Hardreset failed, not off-lined %d\n", i);
/*
* Try to offline controller atleast twice
goto try_offline_again;
}
- DPRINTK("softreset, controller off-lined\n");
+ DPRINTK("hardreset, controller off-lined\n");
VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
if (!(temp & ONLINE)) {
ata_port_printk(ap, KERN_ERR,
- "Softreset failed, not on-lined\n");
+ "Hardreset failed, not on-lined\n");
goto err;
}
- DPRINTK("softreset, controller off-lined & on-lined\n");
+ DPRINTK("hardreset, controller off-lined & on-lined\n");
VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS));
VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL));
"No Device OR PHYRDY change,Hstatus = 0x%x\n",
ioread32(hcr_base + HSTATUS));
*class = ATA_DEV_NONE;
- goto out;
+ return 0;
}
/*
if ((temp & 0xFF) != 0x18) {
ata_port_printk(ap, KERN_WARNING, "No Signature Update\n");
*class = ATA_DEV_NONE;
- goto out;
+ goto do_followup_srst;
} else {
ata_port_printk(ap, KERN_INFO,
"Signature Update detected @ %d msecs\n",
jiffies_to_msecs(jiffies - start_jiffies));
+ *class = sata_fsl_dev_classify(ap);
+ return 0;
+ }
+
+do_followup_srst:
+ /*
+ * request libATA to perform follow-up softreset
+ */
+ return -EAGAIN;
+
+err:
+ return -EIO;
+}
+
+static int sata_fsl_softreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline)
+{
+ struct ata_port *ap = link->ap;
+ struct sata_fsl_port_priv *pp = ap->private_data;
+ struct sata_fsl_host_priv *host_priv = ap->host->private_data;
+ void __iomem *hcr_base = host_priv->hcr_base;
+ int pmp = sata_srst_pmp(link);
+ u32 temp;
+ struct ata_taskfile tf;
+ u8 *cfis;
+ u32 Serror;
+
+ DPRINTK("in xx_softreset\n");
+
+ if (ata_link_offline(link)) {
+ DPRINTK("PHY reports no device\n");
+ *class = ATA_DEV_NONE;
+ return 0;
}
/*
* reached here, we can send a command to the target device
*/
-issue_srst:
DPRINTK("Sending SRST/device reset\n");
ata_tf_init(link->device, &tf);
ioread32(CA + hcr_base), ioread32(CC + hcr_base));
iowrite32(0xFFFF, CC + hcr_base);
+ if (pmp != SATA_PMP_CTRL_PORT)
+ iowrite32(pmp, CQPMP + hcr_base);
iowrite32(1, CQ + hcr_base);
temp = ata_wait_register(CQ + hcr_base, 0x1, 0x1, 1, 5000);
VPRINTK("cereg = 0x%x\n", ioread32(hcr_base + CE));
}
-out:
return 0;
err:
ehi->err_mask |= AC_ERR_ATA_BUS;
ehi->action |= ATA_EH_SOFTRESET;
- /*
- * Ignore serror in case of fatal errors as we always want
- * to do a soft-reset of the FSL SATA controller. Analyzing
- * serror may cause libata to schedule a hard-reset action,
- * and hard-reset currently does not do controller
- * offline/online, causing command timeouts and leads to an
- * un-recoverable state, hence make libATA ignore
- * autopsy in case of fatal errors.
- */
-
- ehi->flags |= ATA_EHI_NO_AUTOPSY;
-
freeze = 1;
}
.freeze = sata_fsl_freeze,
.thaw = sata_fsl_thaw,
- .prereset = sata_fsl_prereset,
.softreset = sata_fsl_softreset,
+ .hardreset = sata_fsl_hardreset,
.pmp_softreset = sata_fsl_softreset,
.error_handler = sata_fsl_error_handler,
.post_internal_cmd = sata_fsl_post_internal_cmd,
return count;
}
-DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
+static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
static ssize_t dev_show_unique_id(struct device *dev,
struct device_attribute *attr,
sn[8], sn[9], sn[10], sn[11],
sn[12], sn[13], sn[14], sn[15]);
}
-DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
+static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
static ssize_t dev_show_vendor(struct device *dev,
struct device_attribute *attr,
else
return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
}
-DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
+static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
static ssize_t dev_show_model(struct device *dev,
struct device_attribute *attr,
else
return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
}
-DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
+static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
static ssize_t dev_show_rev(struct device *dev,
struct device_attribute *attr,
else
return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
}
-DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
+static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
static ssize_t cciss_show_lunid(struct device *dev,
struct device_attribute *attr, char *buf)
lunid[0], lunid[1], lunid[2], lunid[3],
lunid[4], lunid[5], lunid[6], lunid[7]);
}
-DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
+static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
static ssize_t cciss_show_raid_level(struct device *dev,
struct device_attribute *attr, char *buf)
return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
raid_label[raid]);
}
-DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
+static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
static ssize_t cciss_show_usage_count(struct device *dev,
struct device_attribute *attr, char *buf)
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
return snprintf(buf, 20, "%d\n", count);
}
-DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
+static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
static struct attribute *cciss_host_attrs[] = {
&dev_attr_rescan.attr,
#define PCI_DEVICE_ID_INTEL_IGDNG_D_IG 0x0042
#define PCI_DEVICE_ID_INTEL_IGDNG_M_HB 0x0044
#define PCI_DEVICE_ID_INTEL_IGDNG_MA_HB 0x0062
+#define PCI_DEVICE_ID_INTEL_IGDNG_MC2_HB 0x006a
#define PCI_DEVICE_ID_INTEL_IGDNG_M_IG 0x0046
/* cover 915 and 945 variants */
agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_B43_HB || \
agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_IGDNG_D_HB || \
agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_IGDNG_M_HB || \
- agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_IGDNG_MA_HB)
+ agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_IGDNG_MA_HB || \
+ agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_IGDNG_MC2_HB)
extern int agp_memory_reserved;
case PCI_DEVICE_ID_INTEL_IGDNG_D_HB:
case PCI_DEVICE_ID_INTEL_IGDNG_M_HB:
case PCI_DEVICE_ID_INTEL_IGDNG_MA_HB:
+ case PCI_DEVICE_ID_INTEL_IGDNG_MC2_HB:
*gtt_offset = *gtt_size = MB(2);
break;
default:
"IGDNG/M", NULL, &intel_i965_driver },
{ PCI_DEVICE_ID_INTEL_IGDNG_MA_HB, PCI_DEVICE_ID_INTEL_IGDNG_M_IG, 0,
"IGDNG/MA", NULL, &intel_i965_driver },
+ { PCI_DEVICE_ID_INTEL_IGDNG_MC2_HB, PCI_DEVICE_ID_INTEL_IGDNG_M_IG, 0,
+ "IGDNG/MC2", NULL, &intel_i965_driver },
{ 0, 0, 0, NULL, NULL, NULL }
};
ID(PCI_DEVICE_ID_INTEL_IGDNG_D_HB),
ID(PCI_DEVICE_ID_INTEL_IGDNG_M_HB),
ID(PCI_DEVICE_ID_INTEL_IGDNG_MA_HB),
+ ID(PCI_DEVICE_ID_INTEL_IGDNG_MC2_HB),
{ }
};
select DMA_ENGINE
select DCA
select ASYNC_TX_DISABLE_CHANNEL_SWITCH
+ select ASYNC_TX_DISABLE_PQ_VAL_DMA
+ select ASYNC_TX_DISABLE_XOR_VAL_DMA
help
Enable support for the Intel(R) I/OAT DMA engine present
in recent Intel Xeon chipsets.
#if defined(CONFIG_ASYNC_XOR) || defined(CONFIG_ASYNC_XOR_MODULE)
if (!dma_has_cap(DMA_XOR, device->cap_mask))
return false;
+
+ #ifndef CONFIG_ASYNC_TX_DISABLE_XOR_VAL_DMA
+ if (!dma_has_cap(DMA_XOR_VAL, device->cap_mask))
+ return false;
+ #endif
#endif
#if defined(CONFIG_ASYNC_PQ) || defined(CONFIG_ASYNC_PQ_MODULE)
if (!dma_has_cap(DMA_PQ, device->cap_mask))
return false;
+
+ #ifndef CONFIG_ASYNC_TX_DISABLE_PQ_VAL_DMA
+ if (!dma_has_cap(DMA_PQ_VAL, device->cap_mask))
+ return false;
+ #endif
#endif
return true;
cpuid_level_9 = cpuid_eax(9);
res = test_bit(0, &cpuid_level_9);
if (!res)
- dev_err(&pdev->dev, "DCA is disabled in BIOS\n");
+ dev_dbg(&pdev->dev, "DCA is disabled in BIOS\n");
return res;
}
-static int system_has_dca_enabled(struct pci_dev *pdev)
+int system_has_dca_enabled(struct pci_dev *pdev)
{
if (boot_cpu_has(X86_FEATURE_DCA))
return dca_enabled_in_bios(pdev);
- dev_err(&pdev->dev, "boot cpu doesn't have X86_FEATURE_DCA\n");
+ dev_dbg(&pdev->dev, "boot cpu doesn't have X86_FEATURE_DCA\n");
return 0;
}
/* channel was fatally programmed */
static inline bool is_ioat_bug(unsigned long err)
{
- return !!(err & (IOAT_CHANERR_SRC_ADDR_ERR|IOAT_CHANERR_DEST_ADDR_ERR|
- IOAT_CHANERR_NEXT_ADDR_ERR|IOAT_CHANERR_CONTROL_ERR|
- IOAT_CHANERR_LENGTH_ERR));
+ return !!err;
}
static inline void ioat_unmap(struct pci_dev *pdev, dma_addr_t addr, size_t len,
u32 chanerr;
chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET);
+ dev_err(to_dev(chan), "%s: Channel halted (%x)\n",
+ __func__, chanerr);
BUG_ON(is_ioat_bug(chanerr));
}
u32 chanerr;
chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET);
+ dev_err(to_dev(chan), "%s: Channel halted (%x)\n",
+ __func__, chanerr);
BUG_ON(is_ioat_bug(chanerr));
}
dump_desc_dbg(ioat, compl_desc);
/* we leave the channel locked to ensure in order submission */
- return &desc->txd;
+ return &compl_desc->txd;
}
static struct dma_async_tx_descriptor *
dump_desc_dbg(ioat, compl_desc);
/* we leave the channel locked to ensure in order submission */
- return &desc->txd;
+ return &compl_desc->txd;
}
static struct dma_async_tx_descriptor *
unsigned int src_cnt, const unsigned char *scf, size_t len,
unsigned long flags)
{
+ /* specify valid address for disabled result */
+ if (flags & DMA_PREP_PQ_DISABLE_P)
+ dst[0] = dst[1];
+ if (flags & DMA_PREP_PQ_DISABLE_Q)
+ dst[1] = dst[0];
+
/* handle the single source multiply case from the raid6
* recovery path
*/
- if (unlikely((flags & DMA_PREP_PQ_DISABLE_P) && src_cnt == 1)) {
+ if ((flags & DMA_PREP_PQ_DISABLE_P) && src_cnt == 1) {
dma_addr_t single_source[2];
unsigned char single_source_coef[2];
unsigned int src_cnt, const unsigned char *scf, size_t len,
enum sum_check_flags *pqres, unsigned long flags)
{
+ /* specify valid address for disabled result */
+ if (flags & DMA_PREP_PQ_DISABLE_P)
+ pq[0] = pq[1];
+ if (flags & DMA_PREP_PQ_DISABLE_Q)
+ pq[1] = pq[0];
+
/* the cleanup routine only sets bits on validate failure, it
* does not clear bits on validate success... so clear it here
*/
dma_addr_t pq[2];
memset(scf, 0, src_cnt);
- flags |= DMA_PREP_PQ_DISABLE_Q;
pq[0] = dst;
- pq[1] = ~0;
+ flags |= DMA_PREP_PQ_DISABLE_Q;
+ pq[1] = dst; /* specify valid address for disabled result */
return __ioat3_prep_pq_lock(chan, NULL, pq, src, src_cnt, scf, len,
flags);
*result = 0;
memset(scf, 0, src_cnt);
- flags |= DMA_PREP_PQ_DISABLE_Q;
pq[0] = src[0];
- pq[1] = ~0;
+ flags |= DMA_PREP_PQ_DISABLE_Q;
+ pq[1] = pq[0]; /* specify valid address for disabled result */
return __ioat3_prep_pq_lock(chan, result, pq, &src[1], src_cnt - 1, scf,
len, flags);
int __devinit ioat3_dma_probe(struct ioatdma_device *device, int dca)
{
struct pci_dev *pdev = device->pdev;
+ int dca_en = system_has_dca_enabled(pdev);
struct dma_device *dma;
struct dma_chan *c;
struct ioat_chan_common *chan;
dma->device_prep_dma_interrupt = ioat3_prep_interrupt_lock;
cap = readl(device->reg_base + IOAT_DMA_CAP_OFFSET);
+
+ /* dca is incompatible with raid operations */
+ if (dca_en && (cap & (IOAT_CAP_XOR|IOAT_CAP_PQ)))
+ cap &= ~(IOAT_CAP_XOR|IOAT_CAP_PQ);
+
if (cap & IOAT_CAP_XOR) {
is_raid_device = true;
dma->max_xor = 8;
device->timer_fn = ioat2_timer_event;
}
+ #ifdef CONFIG_ASYNC_TX_DISABLE_PQ_VAL_DMA
+ dma_cap_clear(DMA_PQ_VAL, dma->cap_mask);
+ dma->device_prep_dma_pq_val = NULL;
+ #endif
+
+ #ifdef CONFIG_ASYNC_TX_DISABLE_XOR_VAL_DMA
+ dma_cap_clear(DMA_XOR_VAL, dma->cap_mask);
+ dma->device_prep_dma_xor_val = NULL;
+ #endif
+
/* -= IOAT ver.3 workarounds =- */
/* Write CHANERRMSK_INT with 3E07h to mask out the errors
* that can cause stability issues for IOAT ver.3
#define IOAT_VER_3_0 0x30 /* Version 3.0 */
#define IOAT_VER_3_2 0x32 /* Version 3.2 */
+int system_has_dca_enabled(struct pci_dev *pdev);
+
struct ioat_dma_descriptor {
uint32_t size;
union {
#define IOAT_CHANCTRL_ERR_COMPLETION_EN 0x0004
#define IOAT_CHANCTRL_INT_REARM 0x0001
#define IOAT_CHANCTRL_RUN (IOAT_CHANCTRL_INT_REARM |\
- IOAT_CHANCTRL_ERR_COMPLETION_EN |\
- IOAT_CHANCTRL_ANY_ERR_ABORT_EN |\
- IOAT_CHANCTRL_ERR_INT_EN)
+ IOAT_CHANCTRL_ANY_ERR_ABORT_EN)
#define IOAT_DMA_COMP_OFFSET 0x02 /* 16-bit DMA channel compatibility */
#define IOAT_DMA_COMP_V1 0x0001 /* Compatibility with DMA version 1 */
#endif
struct sh_dmae_device *shdev;
+ /* get platform data */
+ if (!pdev->dev.platform_data)
+ return -ENODEV;
+
shdev = kzalloc(sizeof(struct sh_dmae_device), GFP_KERNEL);
if (!shdev) {
dev_err(&pdev->dev, "No enough memory\n");
- err = -ENOMEM;
- goto shdev_err;
+ return -ENOMEM;
}
- /* get platform data */
- if (!pdev->dev.platform_data)
- goto shdev_err;
-
/* platform data */
memcpy(&shdev->pdata, pdev->dev.platform_data,
sizeof(struct sh_dmae_pdata));
rst_err:
kfree(shdev);
-shdev_err:
return err;
}
config DRM_I915
tristate "i915 driver"
depends on AGP_INTEL
+ select SHMEM
select DRM_KMS_HELPER
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
return NULL;
}
+ /* Some EDIDs have bogus h/vtotal values */
+ if (mode->hsync_end > mode->htotal)
+ mode->htotal = mode->hsync_end + 1;
+ if (mode->vsync_end > mode->vtotal)
+ mode->vtotal = mode->vsync_end + 1;
+
drm_mode_set_name(mode);
if (pt->misc & DRM_EDID_PT_INTERLACED)
struct drm_framebuffer *fb = fb_helper->fb;
int depth;
- if (var->pixclock == -1 || !var->pixclock)
+ if (var->pixclock != 0)
return -EINVAL;
/* Need to resize the fb object !!! */
int ret;
int i;
- if (var->pixclock != -1) {
+ if (var->pixclock != 0) {
DRM_ERROR("PIXEL CLCOK SET\n");
return -EINVAL;
}
fb_helper->fb = fb;
if (new_fb) {
- info->var.pixclock = -1;
+ info->var.pixclock = 0;
if (register_framebuffer(info) < 0)
return -EINVAL;
} else {
vma->vm_flags |= VM_RESERVED | VM_IO | VM_PFNMAP | VM_DONTEXPAND;
vma->vm_ops = obj->dev->driver->gem_vm_ops;
vma->vm_private_data = map->handle;
- vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
+ vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
/* Take a ref for this mapping of the object, so that the fault
* handler can dereference the mmap offset's pointer to the object.
return child;
}
+/* drm_mm_pre_get() - pre allocate drm_mm_node structure
+ * drm_mm: memory manager struct we are pre-allocating for
+ *
+ * Returns 0 on success or -ENOMEM if allocation fails.
+ */
int drm_mm_pre_get(struct drm_mm *mm)
{
struct drm_mm_node *node;
prev_node->size += next_node->size;
list_del(&next_node->ml_entry);
list_del(&next_node->fl_entry);
+ spin_lock(&mm->unused_lock);
if (mm->num_unused < MM_UNUSED_TARGET) {
list_add(&next_node->fl_entry,
&mm->unused_nodes);
++mm->num_unused;
} else
kfree(next_node);
+ spin_unlock(&mm->unused_lock);
} else {
next_node->size += cur->size;
next_node->start = cur->start;
list_add(&cur->fl_entry, &mm->fl_entry);
} else {
list_del(&cur->ml_entry);
+ spin_lock(&mm->unused_lock);
if (mm->num_unused < MM_UNUSED_TARGET) {
list_add(&cur->fl_entry, &mm->unused_nodes);
++mm->num_unused;
} else
kfree(cur);
+ spin_unlock(&mm->unused_lock);
}
}
uint32_t *mem;
for (page = 0; page < page_count; page++) {
- mem = kmap(pages[page]);
+ mem = kmap_atomic(pages[page], KM_USER0);
for (i = 0; i < PAGE_SIZE; i += 4)
seq_printf(m, "%08x : %08x\n", i, mem[i / 4]);
- kunmap(pages[page]);
+ kunmap_atomic(pages[page], KM_USER0);
}
}
u32 saveVBLANK_A;
u32 saveVSYNC_A;
u32 saveBCLRPAT_A;
+ u32 saveTRANSACONF;
u32 saveTRANS_HTOTAL_A;
u32 saveTRANS_HBLANK_A;
u32 saveTRANS_HSYNC_A;
u32 saveVBLANK_B;
u32 saveVSYNC_B;
u32 saveBCLRPAT_B;
+ u32 saveTRANSBCONF;
u32 saveTRANS_HTOTAL_B;
u32 saveTRANS_HBLANK_B;
u32 saveTRANS_HSYNC_B;
u32 savePFB_WIN_SZ;
u32 savePFA_WIN_POS;
u32 savePFB_WIN_POS;
+ u32 savePCH_DREF_CONTROL;
+ u32 saveDISP_ARB_CTL;
+ u32 savePIPEA_DATA_M1;
+ u32 savePIPEA_DATA_N1;
+ u32 savePIPEA_LINK_M1;
+ u32 savePIPEA_LINK_N1;
+ u32 savePIPEB_DATA_M1;
+ u32 savePIPEB_DATA_N1;
+ u32 savePIPEB_LINK_M1;
+ u32 savePIPEB_LINK_N1;
struct {
struct drm_mm gtt_space;
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int ret = IRQ_NONE;
- u32 de_iir, gt_iir;
+ u32 de_iir, gt_iir, de_ier;
u32 new_de_iir, new_gt_iir;
struct drm_i915_master_private *master_priv;
+ /* disable master interrupt before clearing iir */
+ de_ier = I915_READ(DEIER);
+ I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
+ (void)I915_READ(DEIER);
+
de_iir = I915_READ(DEIIR);
gt_iir = I915_READ(GTIIR);
gt_iir = new_gt_iir;
}
+ I915_WRITE(DEIER, de_ier);
+ (void)I915_READ(DEIER);
+
return ret;
}
if (drm_core_check_feature(dev, DRIVER_MODESET))
return;
+ if (IS_IGDNG(dev)) {
+ dev_priv->savePCH_DREF_CONTROL = I915_READ(PCH_DREF_CONTROL);
+ dev_priv->saveDISP_ARB_CTL = I915_READ(DISP_ARB_CTL);
+ }
+
/* Pipe & plane A info */
dev_priv->savePIPEACONF = I915_READ(PIPEACONF);
dev_priv->savePIPEASRC = I915_READ(PIPEASRC);
dev_priv->saveBCLRPAT_A = I915_READ(BCLRPAT_A);
if (IS_IGDNG(dev)) {
+ dev_priv->savePIPEA_DATA_M1 = I915_READ(PIPEA_DATA_M1);
+ dev_priv->savePIPEA_DATA_N1 = I915_READ(PIPEA_DATA_N1);
+ dev_priv->savePIPEA_LINK_M1 = I915_READ(PIPEA_LINK_M1);
+ dev_priv->savePIPEA_LINK_N1 = I915_READ(PIPEA_LINK_N1);
+
dev_priv->saveFDI_TXA_CTL = I915_READ(FDI_TXA_CTL);
dev_priv->saveFDI_RXA_CTL = I915_READ(FDI_RXA_CTL);
dev_priv->savePFA_WIN_SZ = I915_READ(PFA_WIN_SZ);
dev_priv->savePFA_WIN_POS = I915_READ(PFA_WIN_POS);
+ dev_priv->saveTRANSACONF = I915_READ(TRANSACONF);
dev_priv->saveTRANS_HTOTAL_A = I915_READ(TRANS_HTOTAL_A);
dev_priv->saveTRANS_HBLANK_A = I915_READ(TRANS_HBLANK_A);
dev_priv->saveTRANS_HSYNC_A = I915_READ(TRANS_HSYNC_A);
dev_priv->saveBCLRPAT_B = I915_READ(BCLRPAT_B);
if (IS_IGDNG(dev)) {
+ dev_priv->savePIPEB_DATA_M1 = I915_READ(PIPEB_DATA_M1);
+ dev_priv->savePIPEB_DATA_N1 = I915_READ(PIPEB_DATA_N1);
+ dev_priv->savePIPEB_LINK_M1 = I915_READ(PIPEB_LINK_M1);
+ dev_priv->savePIPEB_LINK_N1 = I915_READ(PIPEB_LINK_N1);
+
dev_priv->saveFDI_TXB_CTL = I915_READ(FDI_TXB_CTL);
dev_priv->saveFDI_RXB_CTL = I915_READ(FDI_RXB_CTL);
dev_priv->savePFB_WIN_SZ = I915_READ(PFB_WIN_SZ);
dev_priv->savePFB_WIN_POS = I915_READ(PFB_WIN_POS);
+ dev_priv->saveTRANSBCONF = I915_READ(TRANSBCONF);
dev_priv->saveTRANS_HTOTAL_B = I915_READ(TRANS_HTOTAL_B);
dev_priv->saveTRANS_HBLANK_B = I915_READ(TRANS_HBLANK_B);
dev_priv->saveTRANS_HSYNC_B = I915_READ(TRANS_HSYNC_B);
fpb1_reg = FPB1;
}
+ if (IS_IGDNG(dev)) {
+ I915_WRITE(PCH_DREF_CONTROL, dev_priv->savePCH_DREF_CONTROL);
+ I915_WRITE(DISP_ARB_CTL, dev_priv->saveDISP_ARB_CTL);
+ }
+
/* Pipe & plane A info */
/* Prime the clock */
if (dev_priv->saveDPLL_A & DPLL_VCO_ENABLE) {
I915_WRITE(BCLRPAT_A, dev_priv->saveBCLRPAT_A);
if (IS_IGDNG(dev)) {
+ I915_WRITE(PIPEA_DATA_M1, dev_priv->savePIPEA_DATA_M1);
+ I915_WRITE(PIPEA_DATA_N1, dev_priv->savePIPEA_DATA_N1);
+ I915_WRITE(PIPEA_LINK_M1, dev_priv->savePIPEA_LINK_M1);
+ I915_WRITE(PIPEA_LINK_N1, dev_priv->savePIPEA_LINK_N1);
+
I915_WRITE(FDI_RXA_CTL, dev_priv->saveFDI_RXA_CTL);
I915_WRITE(FDI_TXA_CTL, dev_priv->saveFDI_TXA_CTL);
I915_WRITE(PFA_WIN_SZ, dev_priv->savePFA_WIN_SZ);
I915_WRITE(PFA_WIN_POS, dev_priv->savePFA_WIN_POS);
+ I915_WRITE(TRANSACONF, dev_priv->saveTRANSACONF);
I915_WRITE(TRANS_HTOTAL_A, dev_priv->saveTRANS_HTOTAL_A);
I915_WRITE(TRANS_HBLANK_A, dev_priv->saveTRANS_HBLANK_A);
I915_WRITE(TRANS_HSYNC_A, dev_priv->saveTRANS_HSYNC_A);
/* Actually enable it */
I915_WRITE(dpll_b_reg, dev_priv->saveDPLL_B);
DRM_UDELAY(150);
- if (IS_I965G(dev))
+ if (IS_I965G(dev) && !IS_IGDNG(dev))
I915_WRITE(DPLL_B_MD, dev_priv->saveDPLL_B_MD);
DRM_UDELAY(150);
I915_WRITE(BCLRPAT_B, dev_priv->saveBCLRPAT_B);
if (IS_IGDNG(dev)) {
+ I915_WRITE(PIPEB_DATA_M1, dev_priv->savePIPEB_DATA_M1);
+ I915_WRITE(PIPEB_DATA_N1, dev_priv->savePIPEB_DATA_N1);
+ I915_WRITE(PIPEB_LINK_M1, dev_priv->savePIPEB_LINK_M1);
+ I915_WRITE(PIPEB_LINK_N1, dev_priv->savePIPEB_LINK_N1);
+
I915_WRITE(FDI_RXB_CTL, dev_priv->saveFDI_RXB_CTL);
I915_WRITE(FDI_TXB_CTL, dev_priv->saveFDI_TXB_CTL);
I915_WRITE(PFB_WIN_SZ, dev_priv->savePFB_WIN_SZ);
I915_WRITE(PFB_WIN_POS, dev_priv->savePFB_WIN_POS);
+ I915_WRITE(TRANSBCONF, dev_priv->saveTRANSBCONF);
I915_WRITE(TRANS_HTOTAL_B, dev_priv->saveTRANS_HTOTAL_B);
I915_WRITE(TRANS_HBLANK_B, dev_priv->saveTRANS_HBLANK_B);
I915_WRITE(TRANS_HSYNC_B, dev_priv->saveTRANS_HSYNC_B);
} while (time_after(timeout, jiffies));
}
- if ((I915_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) ==
- CRT_HOTPLUG_MONITOR_COLOR)
+ if ((I915_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) !=
+ CRT_HOTPLUG_MONITOR_NONE)
return true;
return false;
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
intel_clock_t clock;
- int max_n;
- bool found;
int err_most = 47;
- found = false;
+ int err_min = 10000;
/* eDP has only 2 clock choice, no n/m/p setting */
if (HAS_eDP)
}
memset(best_clock, 0, sizeof(*best_clock));
- max_n = limit->n.max;
for (clock.p1 = limit->p1.max; clock.p1 >= limit->p1.min; clock.p1--) {
/* based on hardware requriment prefer smaller n to precision */
- for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
+ for (clock.n = limit->n.min; clock.n <= limit->n.max; clock.n++) {
/* based on hardware requirment prefere larger m1,m2 */
for (clock.m1 = limit->m1.max;
clock.m1 >= limit->m1.min; clock.m1--) {
this_err = abs((10000 - (target*10000/clock.dot)));
if (this_err < err_most) {
*best_clock = clock;
- err_most = this_err;
- max_n = clock.n;
- found = true;
/* found on first matching */
goto out;
+ } else if (this_err < err_min) {
+ *best_clock = clock;
+ err_min = this_err;
}
}
}
}
}
out:
- return found;
+ return true;
}
/* DisplayPort has only two frequencies, 162MHz and 270MHz */
struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
u32 temp;
- if (mode != DRM_MODE_DPMS_ON) {
- temp = I915_READ(hdmi_priv->sdvox_reg);
+ temp = I915_READ(hdmi_priv->sdvox_reg);
+
+ /* HW workaround, need to toggle enable bit off and on for 12bpc, but
+ * we do this anyway which shows more stable in testing.
+ */
+ if (IS_IGDNG(dev)) {
I915_WRITE(hdmi_priv->sdvox_reg, temp & ~SDVO_ENABLE);
+ POSTING_READ(hdmi_priv->sdvox_reg);
+ }
+
+ if (mode != DRM_MODE_DPMS_ON) {
+ temp &= ~SDVO_ENABLE;
} else {
- temp = I915_READ(hdmi_priv->sdvox_reg);
- I915_WRITE(hdmi_priv->sdvox_reg, temp | SDVO_ENABLE);
+ temp |= SDVO_ENABLE;
}
+
+ I915_WRITE(hdmi_priv->sdvox_reg, temp);
POSTING_READ(hdmi_priv->sdvox_reg);
+
+ /* HW workaround, need to write this twice for issue that may result
+ * in first write getting masked.
+ */
+ if (IS_IGDNG(dev)) {
+ I915_WRITE(hdmi_priv->sdvox_reg, temp);
+ POSTING_READ(hdmi_priv->sdvox_reg);
+ }
}
static void intel_hdmi_save(struct drm_connector *connector)
base += 3;
break;
case ATOM_IIO_WRITE:
+ (void)ctx->card->reg_read(ctx->card, CU16(base + 1));
ctx->card->reg_write(ctx->card, CU16(base + 1), temp);
base += 3;
break;
* AGP
*/
int radeon_agp_init(struct radeon_device *rdev);
+void radeon_agp_resume(struct radeon_device *rdev);
void radeon_agp_fini(struct radeon_device *rdev);
#endif
}
+void radeon_agp_resume(struct radeon_device *rdev)
+{
+#if __OS_HAS_AGP
+ int r;
+ if (rdev->flags & RADEON_IS_AGP) {
+ r = radeon_agp_init(rdev);
+ if (r)
+ dev_warn(rdev->dev, "radeon AGP reinit failed\n");
+ }
+#endif
+}
+
void radeon_agp_fini(struct radeon_device *rdev)
{
#if __OS_HAS_AGP
radeon_i2c_do_lock(radeon_connector, 0);
if (!radeon_connector->edid) {
- DRM_ERROR("DDC responded but not EDID found for %s\n",
- drm_get_connector_name(connector));
+ DRM_ERROR("%s: probed a monitor but no|invalid EDID\n",
+ drm_get_connector_name(connector));
+ ret = connector_status_connected;
} else {
radeon_connector->use_digital = !!(radeon_connector->edid->input & DRM_EDID_INPUT_DIGITAL);
radeon_i2c_do_lock(radeon_connector, 0);
if (!radeon_connector->edid) {
- DRM_ERROR("DDC responded but not EDID found for %s\n",
- drm_get_connector_name(connector));
+ DRM_ERROR("%s: probed a monitor but no|invalid EDID\n",
+ drm_get_connector_name(connector));
} else {
radeon_connector->use_digital = !!(radeon_connector->edid->input & DRM_EDID_INPUT_DIGITAL);
if (ret)
goto failed;
radeon_connector->dac_load_detect = true;
+ /* RS400,RC410,RS480 chipset seems to report a lot
+ * of false positive on load detect, we haven't yet
+ * found a way to make load detect reliable on those
+ * chipset, thus just disable it for TV.
+ */
+ if (rdev->family == CHIP_RS400 || rdev->family == CHIP_RS480)
+ radeon_connector->dac_load_detect = false;
drm_connector_attach_property(&radeon_connector->base,
rdev->mode_info.load_detect_property,
1);
return -1;
}
pci_set_master(dev->pdev);
+ /* resume AGP if in use */
+ radeon_agp_resume(rdev);
radeon_resume(rdev);
radeon_restore_bios_scratch_regs(rdev);
fb_set_suspend(rdev->fbdev_info, 0);
void rv515_vga_render_disable(struct radeon_device *rdev)
{
- WREG32(R_000330_D1VGA_CONTROL, 0);
- WREG32(R_000338_D2VGA_CONTROL, 0);
WREG32(R_000300_VGA_RENDER_CONTROL,
RREG32(R_000300_VGA_RENDER_CONTROL) & C_000300_VGA_VSTATUS_CNTL);
}
save->d2crtc_control = RREG32(R_006880_D2CRTC_CONTROL);
/* Stop all video */
- WREG32(R_000330_D1VGA_CONTROL, 0);
WREG32(R_0068E8_D2CRTC_UPDATE_LOCK, 0);
WREG32(R_000300_VGA_RENDER_CONTROL, 0);
WREG32(R_0060E8_D1CRTC_UPDATE_LOCK, 1);
WREG32(R_006880_D2CRTC_CONTROL, 0);
WREG32(R_0060E8_D1CRTC_UPDATE_LOCK, 0);
WREG32(R_0068E8_D2CRTC_UPDATE_LOCK, 0);
+ WREG32(R_000330_D1VGA_CONTROL, 0);
+ WREG32(R_000338_D2VGA_CONTROL, 0);
}
void rv515_mc_resume(struct radeon_device *rdev, struct rv515_mc_save *save)
WREG32(R_000328_VGA_HDP_CONTROL, save->vga_hdp_control);
mdelay(1);
/* Restore video state */
+ WREG32(R_000330_D1VGA_CONTROL, save->d1vga_control);
+ WREG32(R_000338_D2VGA_CONTROL, save->d2vga_control);
WREG32(R_0060E8_D1CRTC_UPDATE_LOCK, 1);
WREG32(R_0068E8_D2CRTC_UPDATE_LOCK, 1);
WREG32(R_006080_D1CRTC_CONTROL, save->d1crtc_control);
WREG32(R_006880_D2CRTC_CONTROL, save->d2crtc_control);
WREG32(R_0060E8_D1CRTC_UPDATE_LOCK, 0);
WREG32(R_0068E8_D2CRTC_UPDATE_LOCK, 0);
- WREG32(R_000330_D1VGA_CONTROL, save->d1vga_control);
- WREG32(R_000338_D2VGA_CONTROL, save->d2vga_control);
WREG32(R_000300_VGA_RENDER_CONTROL, save->vga_render_control);
}
*/
#undef START_IN_KERNEL_MODE
-#define DRV_VER "0.5.17"
+#define DRV_VER "0.5.18"
/*
* According to the Atom N270 datasheet,
* measured by the on-die thermal monitor are within 0 <= Tj <= 90. So,
* assume 89°C is critical temperature.
*/
-#define ACERHDF_TEMP_CRIT 89
+#define ACERHDF_TEMP_CRIT 89000
#define ACERHDF_FAN_OFF 0
#define ACERHDF_FAN_AUTO 1
* No matter what value the user puts into the fanon variable, turn on the fan
* at 80 degree Celsius to prevent hardware damage
*/
-#define ACERHDF_MAX_FANON 80
+#define ACERHDF_MAX_FANON 80000
/*
* Maximum interval between two temperature checks is 15 seconds, as the die
#endif
static unsigned int interval = 10;
-static unsigned int fanon = 63;
-static unsigned int fanoff = 58;
+static unsigned int fanon = 63000;
+static unsigned int fanoff = 58000;
static unsigned int verbose;
static unsigned int fanstate = ACERHDF_FAN_AUTO;
static char force_bios[16];
if (ec_read(bios_cfg->tempreg, &read_temp))
return -EINVAL;
- *temp = read_temp;
+ *temp = read_temp * 1000;
return 0;
}
| (__bv1) << 8 | (__bv2) }
#define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \
- __eid1, __eid2, __ev1, __ev2) \
+ __eid, __ev1, __ev2) \
{ .vendor = (__v), \
.bios = TPID(__bid1, __bid2), \
- .ec = TPID(__eid1, __eid2), \
+ .ec = __eid, \
.quirks = (__ev1) << 24 | (__ev2) << 16 \
| (__bv1) << 8 | (__bv2) }
#define TPV_QI0(__id1, __id2, __bv1, __bv2) \
TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
+/* Outdated IBM BIOSes often lack the EC id string */
#define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
- __bv1, __bv2, __id1, __id2, __ev1, __ev2)
+ __bv1, __bv2, TPID(__id1, __id2), \
+ __ev1, __ev2), \
+ TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \
+ __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
+ __ev1, __ev2)
+/* Outdated IBM BIOSes often lack the EC id string */
#define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \
__eid1, __eid2, __ev1, __ev2) \
TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
- __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
+ __bv1, __bv2, TPID(__eid1, __eid2), \
+ __ev1, __ev2), \
+ TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \
+ __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \
+ __ev1, __ev2)
#define TPV_QL0(__id1, __id2, __bv1, __bv2) \
TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
#define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \
- __bv1, __bv2, __id1, __id2, __ev1, __ev2)
+ __bv1, __bv2, TPID(__id1, __id2), \
+ __ev1, __ev2)
#define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \
__eid1, __eid2, __ev1, __ev2) \
TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \
- __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
+ __bv1, __bv2, TPID(__eid1, __eid2), \
+ __ev1, __ev2)
static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
/* Numeric models ------------------ */
* Doing it this way makes the syscall restartable in case of EINTR
*/
rc = brightness_set(level);
- return (rc == -EINTR)? ERESTARTSYS : rc;
+ return (rc == -EINTR)? -ERESTARTSYS : rc;
}
static struct ibm_struct brightness_driver_data = {
return ret;
}
-struct const ethtool_ops cvm_oct_ethtool_ops = {
+const struct ethtool_ops cvm_oct_ethtool_ops = {
.get_drvinfo = cvm_oct_get_drvinfo,
.get_settings = cvm_oct_get_settings,
.set_settings = cvm_oct_set_settings,
cvmx_write_csr(CVMX_SPXX_INT_MSK(interface), 0);
cvmx_write_csr(CVMX_STXX_INT_MSK(interface), 0);
}
- free_irq(8 + 46, &number_spi_ports);
+ free_irq(OCTEON_IRQ_RML, &number_spi_ports);
}
}
"\tallows packets to be sent without lock contention in the packet\n"
"\tscheduler resulting in some cases in improved throughput.\n");
+
+/*
+ * The offset from mac_addr_base that should be used for the next port
+ * that is configured. By convention, if any mgmt ports exist on the
+ * chip, they get the first mac addresses, The ports controlled by
+ * this driver are numbered sequencially following any mgmt addresses
+ * that may exist.
+ */
+static unsigned int cvm_oct_mac_addr_offset;
+
/**
* Periodic timer to check auto negotiation
*/
*/
int cvm_oct_common_init(struct net_device *dev)
{
- static int count;
- char mac[8] = { 0x00, 0x00,
- octeon_bootinfo->mac_addr_base[0],
- octeon_bootinfo->mac_addr_base[1],
- octeon_bootinfo->mac_addr_base[2],
- octeon_bootinfo->mac_addr_base[3],
- octeon_bootinfo->mac_addr_base[4],
- octeon_bootinfo->mac_addr_base[5] + count
- };
struct octeon_ethernet *priv = netdev_priv(dev);
+ struct sockaddr sa;
+ u64 mac = ((u64)(octeon_bootinfo->mac_addr_base[0] & 0xff) << 40) |
+ ((u64)(octeon_bootinfo->mac_addr_base[1] & 0xff) << 32) |
+ ((u64)(octeon_bootinfo->mac_addr_base[2] & 0xff) << 24) |
+ ((u64)(octeon_bootinfo->mac_addr_base[3] & 0xff) << 16) |
+ ((u64)(octeon_bootinfo->mac_addr_base[4] & 0xff) << 8) |
+ (u64)(octeon_bootinfo->mac_addr_base[5] & 0xff);
+
+ mac += cvm_oct_mac_addr_offset;
+ sa.sa_data[0] = (mac >> 40) & 0xff;
+ sa.sa_data[1] = (mac >> 32) & 0xff;
+ sa.sa_data[2] = (mac >> 24) & 0xff;
+ sa.sa_data[3] = (mac >> 16) & 0xff;
+ sa.sa_data[4] = (mac >> 8) & 0xff;
+ sa.sa_data[5] = mac & 0xff;
+
+ if (cvm_oct_mac_addr_offset >= octeon_bootinfo->mac_addr_count)
+ printk(KERN_DEBUG "%s: Using MAC outside of the assigned range:"
+ " %02x:%02x:%02x:%02x:%02x:%02x\n", dev->name,
+ sa.sa_data[0] & 0xff, sa.sa_data[1] & 0xff,
+ sa.sa_data[2] & 0xff, sa.sa_data[3] & 0xff,
+ sa.sa_data[4] & 0xff, sa.sa_data[5] & 0xff);
+ cvm_oct_mac_addr_offset++;
/*
* Force the interface to use the POW send if always_use_pow
if (priv->queue != -1 && USE_HW_TCPUDP_CHECKSUM)
dev->features |= NETIF_F_IP_CSUM;
- count++;
-
/* We do our own locking, Linux doesn't need to */
dev->features |= NETIF_F_LLTX;
SET_ETHTOOL_OPS(dev, &cvm_oct_ethtool_ops);
cvm_oct_mdio_setup_device(dev);
- dev->netdev_ops->ndo_set_mac_address(dev, mac);
+ dev->netdev_ops->ndo_set_mac_address(dev, &sa);
dev->netdev_ops->ndo_change_mtu(dev, dev->mtu);
/*
pr_notice("cavium-ethernet %s\n", OCTEON_ETHERNET_VERSION);
+ if (OCTEON_IS_MODEL(OCTEON_CN52XX))
+ cvm_oct_mac_addr_offset = 2; /* First two are the mgmt ports. */
+ else if (OCTEON_IS_MODEL(OCTEON_CN56XX))
+ cvm_oct_mac_addr_offset = 1; /* First one is the mgmt port. */
+ else
+ cvm_oct_mac_addr_offset = 0;
+
cvm_oct_proc_initialize();
cvm_oct_rx_initialize();
cvm_oct_configure_common_hw();
BUG_ON(!vcookie->fscache);
- if (PageFsCache(page)) {
- if (fscache_check_page_write(vcookie->fscache, page)) {
- if (!(gfp & __GFP_WAIT))
- return 0;
- fscache_wait_on_page_write(vcookie->fscache, page);
- }
-
- fscache_uncache_page(vcookie->fscache, page);
- ClearPageFsCache(page);
- }
-
- return 1;
+ return fscache_maybe_release_page(vnode->cache, page, gfp);
}
void __v9fs_fscache_invalidate_page(struct page *page)
fscache_wait_on_page_write(vcookie->fscache, page);
BUG_ON(!PageLocked(page));
fscache_uncache_page(vcookie->fscache, page);
- ClearPageFsCache(page);
}
}
struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
fscache_wait_on_page_write(vnode->cache, page);
fscache_uncache_page(vnode->cache, page);
- ClearPageFsCache(page);
}
#endif
/* deny if page is being written to the cache and the caller hasn't
* elected to wait */
#ifdef CONFIG_AFS_FSCACHE
- if (PageFsCache(page)) {
- if (fscache_check_page_write(vnode->cache, page)) {
- if (!(gfp_flags & __GFP_WAIT)) {
- _leave(" = F [cache busy]");
- return 0;
- }
- fscache_wait_on_page_write(vnode->cache, page);
- }
-
- fscache_uncache_page(vnode->cache, page);
- ClearPageFsCache(page);
+ if (!fscache_maybe_release_page(vnode->cache, page, gfp_flags)) {
+ _leave(" = F [cache busy]");
+ return 0;
}
#endif
/*
* attempt to look up the nominated node in this cache
+ * - return -ETIMEDOUT to be scheduled again
*/
-static void cachefiles_lookup_object(struct fscache_object *_object)
+static int cachefiles_lookup_object(struct fscache_object *_object)
{
struct cachefiles_lookup_data *lookup_data;
struct cachefiles_object *parent, *object;
object->fscache.cookie->def->type != FSCACHE_COOKIE_TYPE_INDEX)
cachefiles_attr_changed(&object->fscache);
- if (ret < 0) {
- printk(KERN_WARNING "CacheFiles: Lookup failed error %d\n",
- ret);
+ if (ret < 0 && ret != -ETIMEDOUT) {
+ if (ret != -ENOBUFS)
+ printk(KERN_WARNING
+ "CacheFiles: Lookup failed error %d\n", ret);
fscache_object_lookup_error(&object->fscache);
}
_leave(" [%d]", ret);
+ return ret;
}
/*
}
cache = object->fscache.cache;
+ fscache_object_destroy(&object->fscache);
kmem_cache_free(cachefiles_object_jar, object);
fscache_object_destroyed(cache);
}
if (oi_size == ni_size)
return 0;
- newattrs.ia_size = ni_size;
- newattrs.ia_valid = ATTR_SIZE;
-
cachefiles_begin_secure(cache, &saved_cred);
mutex_lock(&object->backer->d_inode->i_mutex);
+
+ /* if there's an extension to a partial page at the end of the backing
+ * file, we need to discard the partial page so that we pick up new
+ * data after it */
+ if (oi_size & ~PAGE_MASK && ni_size > oi_size) {
+ _debug("discard tail %llx", oi_size);
+ newattrs.ia_valid = ATTR_SIZE;
+ newattrs.ia_size = oi_size & PAGE_MASK;
+ ret = notify_change(object->backer, &newattrs);
+ if (ret < 0)
+ goto truncate_failed;
+ }
+
+ newattrs.ia_valid = ATTR_SIZE;
+ newattrs.ia_size = ni_size;
ret = notify_change(object->backer, &newattrs);
+
+truncate_failed:
mutex_unlock(&object->backer->d_inode->i_mutex);
cachefiles_end_secure(cache, saved_cred);
#include <linux/security.h>
#include "internal.h"
-static int cachefiles_wait_bit(void *flags)
+#define CACHEFILES_KEYBUF_SIZE 512
+
+/*
+ * dump debugging info about an object
+ */
+static noinline
+void __cachefiles_printk_object(struct cachefiles_object *object,
+ const char *prefix,
+ u8 *keybuf)
{
- schedule();
- return 0;
+ struct fscache_cookie *cookie;
+ unsigned keylen, loop;
+
+ printk(KERN_ERR "%sobject: OBJ%x\n",
+ prefix, object->fscache.debug_id);
+ printk(KERN_ERR "%sobjstate=%s fl=%lx swfl=%lx ev=%lx[%lx]\n",
+ prefix, fscache_object_states[object->fscache.state],
+ object->fscache.flags, object->fscache.work.flags,
+ object->fscache.events,
+ object->fscache.event_mask & FSCACHE_OBJECT_EVENTS_MASK);
+ printk(KERN_ERR "%sops=%u inp=%u exc=%u\n",
+ prefix, object->fscache.n_ops, object->fscache.n_in_progress,
+ object->fscache.n_exclusive);
+ printk(KERN_ERR "%sparent=%p\n",
+ prefix, object->fscache.parent);
+
+ spin_lock(&object->fscache.lock);
+ cookie = object->fscache.cookie;
+ if (cookie) {
+ printk(KERN_ERR "%scookie=%p [pr=%p nd=%p fl=%lx]\n",
+ prefix,
+ object->fscache.cookie,
+ object->fscache.cookie->parent,
+ object->fscache.cookie->netfs_data,
+ object->fscache.cookie->flags);
+ if (keybuf)
+ keylen = cookie->def->get_key(cookie->netfs_data, keybuf,
+ CACHEFILES_KEYBUF_SIZE);
+ else
+ keylen = 0;
+ } else {
+ printk(KERN_ERR "%scookie=NULL\n", prefix);
+ keylen = 0;
+ }
+ spin_unlock(&object->fscache.lock);
+
+ if (keylen) {
+ printk(KERN_ERR "%skey=[%u] '", prefix, keylen);
+ for (loop = 0; loop < keylen; loop++)
+ printk("%02x", keybuf[loop]);
+ printk("'\n");
+ }
+}
+
+/*
+ * dump debugging info about a pair of objects
+ */
+static noinline void cachefiles_printk_object(struct cachefiles_object *object,
+ struct cachefiles_object *xobject)
+{
+ u8 *keybuf;
+
+ keybuf = kmalloc(CACHEFILES_KEYBUF_SIZE, GFP_NOIO);
+ if (object)
+ __cachefiles_printk_object(object, "", keybuf);
+ if (xobject)
+ __cachefiles_printk_object(xobject, "x", keybuf);
+ kfree(keybuf);
}
/*
* record the fact that an object is now active
*/
-static void cachefiles_mark_object_active(struct cachefiles_cache *cache,
- struct cachefiles_object *object)
+static int cachefiles_mark_object_active(struct cachefiles_cache *cache,
+ struct cachefiles_object *object)
{
struct cachefiles_object *xobject;
struct rb_node **_p, *_parent = NULL;
try_again:
write_lock(&cache->active_lock);
- if (test_and_set_bit(CACHEFILES_OBJECT_ACTIVE, &object->flags))
+ if (test_and_set_bit(CACHEFILES_OBJECT_ACTIVE, &object->flags)) {
+ printk(KERN_ERR "CacheFiles: Error: Object already active\n");
+ cachefiles_printk_object(object, NULL);
BUG();
+ }
dentry = object->dentry;
_p = &cache->active_nodes.rb_node;
rb_insert_color(&object->active_node, &cache->active_nodes);
write_unlock(&cache->active_lock);
- _leave("");
- return;
+ _leave(" = 0");
+ return 0;
/* an old object from a previous incarnation is hogging the slot - we
* need to wait for it to be destroyed */
printk(KERN_ERR "\n");
printk(KERN_ERR "CacheFiles: Error:"
" Unexpected object collision\n");
- printk(KERN_ERR "xobject: OBJ%x\n",
- xobject->fscache.debug_id);
- printk(KERN_ERR "xobjstate=%s\n",
- fscache_object_states[xobject->fscache.state]);
- printk(KERN_ERR "xobjflags=%lx\n", xobject->fscache.flags);
- printk(KERN_ERR "xobjevent=%lx [%lx]\n",
- xobject->fscache.events, xobject->fscache.event_mask);
- printk(KERN_ERR "xops=%u inp=%u exc=%u\n",
- xobject->fscache.n_ops, xobject->fscache.n_in_progress,
- xobject->fscache.n_exclusive);
- printk(KERN_ERR "xcookie=%p [pr=%p nd=%p fl=%lx]\n",
- xobject->fscache.cookie,
- xobject->fscache.cookie->parent,
- xobject->fscache.cookie->netfs_data,
- xobject->fscache.cookie->flags);
- printk(KERN_ERR "xparent=%p\n",
- xobject->fscache.parent);
- printk(KERN_ERR "object: OBJ%x\n",
- object->fscache.debug_id);
- printk(KERN_ERR "cookie=%p [pr=%p nd=%p fl=%lx]\n",
- object->fscache.cookie,
- object->fscache.cookie->parent,
- object->fscache.cookie->netfs_data,
- object->fscache.cookie->flags);
- printk(KERN_ERR "parent=%p\n",
- object->fscache.parent);
+ cachefiles_printk_object(object, xobject);
BUG();
}
atomic_inc(&xobject->usage);
write_unlock(&cache->active_lock);
- _debug(">>> wait");
- wait_on_bit(&xobject->flags, CACHEFILES_OBJECT_ACTIVE,
- cachefiles_wait_bit, TASK_UNINTERRUPTIBLE);
- _debug("<<< waited");
+ if (test_bit(CACHEFILES_OBJECT_ACTIVE, &xobject->flags)) {
+ wait_queue_head_t *wq;
+
+ signed long timeout = 60 * HZ;
+ wait_queue_t wait;
+ bool requeue;
+
+ /* if the object we're waiting for is queued for processing,
+ * then just put ourselves on the queue behind it */
+ if (slow_work_is_queued(&xobject->fscache.work)) {
+ _debug("queue OBJ%x behind OBJ%x immediately",
+ object->fscache.debug_id,
+ xobject->fscache.debug_id);
+ goto requeue;
+ }
+
+ /* otherwise we sleep until either the object we're waiting for
+ * is done, or the slow-work facility wants the thread back to
+ * do other work */
+ wq = bit_waitqueue(&xobject->flags, CACHEFILES_OBJECT_ACTIVE);
+ init_wait(&wait);
+ requeue = false;
+ do {
+ prepare_to_wait(wq, &wait, TASK_UNINTERRUPTIBLE);
+ if (!test_bit(CACHEFILES_OBJECT_ACTIVE, &xobject->flags))
+ break;
+ requeue = slow_work_sleep_till_thread_needed(
+ &object->fscache.work, &timeout);
+ } while (timeout > 0 && !requeue);
+ finish_wait(wq, &wait);
+
+ if (requeue &&
+ test_bit(CACHEFILES_OBJECT_ACTIVE, &xobject->flags)) {
+ _debug("queue OBJ%x behind OBJ%x after wait",
+ object->fscache.debug_id,
+ xobject->fscache.debug_id);
+ goto requeue;
+ }
+
+ if (timeout <= 0) {
+ printk(KERN_ERR "\n");
+ printk(KERN_ERR "CacheFiles: Error: Overlong"
+ " wait for old active object to go away\n");
+ cachefiles_printk_object(object, xobject);
+ goto requeue;
+ }
+ }
+
+ ASSERT(!test_bit(CACHEFILES_OBJECT_ACTIVE, &xobject->flags));
cache->cache.ops->put_object(&xobject->fscache);
goto try_again;
+
+requeue:
+ clear_bit(CACHEFILES_OBJECT_ACTIVE, &object->flags);
+ cache->cache.ops->put_object(&xobject->fscache);
+ _leave(" = -ETIMEDOUT");
+ return -ETIMEDOUT;
}
/*
dir = dget_parent(object->dentry);
- mutex_lock(&dir->d_inode->i_mutex);
+ mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
ret = cachefiles_bury_object(cache, dir, object->dentry);
dput(dir);
/* search the current directory for the element name */
_debug("lookup '%s'", name);
- mutex_lock(&dir->d_inode->i_mutex);
+ mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
start = jiffies;
next = lookup_one_len(name, dir, nlen);
}
/* note that we're now using this object */
- cachefiles_mark_object_active(cache, object);
+ ret = cachefiles_mark_object_active(cache, object);
mutex_unlock(&dir->d_inode->i_mutex);
dput(dir);
dir = NULL;
+ if (ret == -ETIMEDOUT)
+ goto mark_active_timed_out;
+
_debug("=== OBTAINED_OBJECT ===");
if (object->new) {
cachefiles_io_error(cache, "Create/mkdir failed");
goto error;
+mark_active_timed_out:
+ _debug("mark active timed out");
+ goto release_dentry;
+
check_error:
_debug("check error %d", ret);
write_lock(&cache->active_lock);
clear_bit(CACHEFILES_OBJECT_ACTIVE, &object->flags);
wake_up_bit(&object->flags, CACHEFILES_OBJECT_ACTIVE);
write_unlock(&cache->active_lock);
-
+release_dentry:
dput(object->dentry);
object->dentry = NULL;
goto error_out;
error_out2:
dput(dir);
error_out:
- if (ret == -ENOSPC)
- ret = -ENOBUFS;
-
_leave(" = error %d", -ret);
return ret;
}
_debug("--- monitor %p %lx ---", page, page->flags);
- if (!PageUptodate(page) && !PageError(page))
- dump_stack();
+ if (!PageUptodate(page) && !PageError(page)) {
+ /* unlocked, not uptodate and not erronous? */
+ _debug("page probably truncated");
+ }
/* remove from the waitqueue */
list_del(&wait->task_list);
return 0;
}
+/*
+ * handle a probably truncated page
+ * - check to see if the page is still relevant and reissue the read if
+ * possible
+ * - return -EIO on error, -ENODATA if the page is gone, -EINPROGRESS if we
+ * must wait again and 0 if successful
+ */
+static int cachefiles_read_reissue(struct cachefiles_object *object,
+ struct cachefiles_one_read *monitor)
+{
+ struct address_space *bmapping = object->backer->d_inode->i_mapping;
+ struct page *backpage = monitor->back_page, *backpage2;
+ int ret;
+
+ kenter("{ino=%lx},{%lx,%lx}",
+ object->backer->d_inode->i_ino,
+ backpage->index, backpage->flags);
+
+ /* skip if the page was truncated away completely */
+ if (backpage->mapping != bmapping) {
+ kleave(" = -ENODATA [mapping]");
+ return -ENODATA;
+ }
+
+ backpage2 = find_get_page(bmapping, backpage->index);
+ if (!backpage2) {
+ kleave(" = -ENODATA [gone]");
+ return -ENODATA;
+ }
+
+ if (backpage != backpage2) {
+ put_page(backpage2);
+ kleave(" = -ENODATA [different]");
+ return -ENODATA;
+ }
+
+ /* the page is still there and we already have a ref on it, so we don't
+ * need a second */
+ put_page(backpage2);
+
+ INIT_LIST_HEAD(&monitor->op_link);
+ add_page_wait_queue(backpage, &monitor->monitor);
+
+ if (trylock_page(backpage)) {
+ ret = -EIO;
+ if (PageError(backpage))
+ goto unlock_discard;
+ ret = 0;
+ if (PageUptodate(backpage))
+ goto unlock_discard;
+
+ kdebug("reissue read");
+ ret = bmapping->a_ops->readpage(NULL, backpage);
+ if (ret < 0)
+ goto unlock_discard;
+ }
+
+ /* but the page may have been read before the monitor was installed, so
+ * the monitor may miss the event - so we have to ensure that we do get
+ * one in such a case */
+ if (trylock_page(backpage)) {
+ _debug("jumpstart %p {%lx}", backpage, backpage->flags);
+ unlock_page(backpage);
+ }
+
+ /* it'll reappear on the todo list */
+ kleave(" = -EINPROGRESS");
+ return -EINPROGRESS;
+
+unlock_discard:
+ unlock_page(backpage);
+ spin_lock_irq(&object->work_lock);
+ list_del(&monitor->op_link);
+ spin_unlock_irq(&object->work_lock);
+ kleave(" = %d", ret);
+ return ret;
+}
+
/*
* copy data from backing pages to netfs pages to complete a read operation
* - driven by FS-Cache's thread pool
_debug("- copy {%lu}", monitor->back_page->index);
- error = -EIO;
+ recheck:
if (PageUptodate(monitor->back_page)) {
copy_highpage(monitor->netfs_page, monitor->back_page);
pagevec_add(&pagevec, monitor->netfs_page);
fscache_mark_pages_cached(monitor->op, &pagevec);
error = 0;
- }
-
- if (error)
+ } else if (!PageError(monitor->back_page)) {
+ /* the page has probably been truncated */
+ error = cachefiles_read_reissue(object, monitor);
+ if (error == -EINPROGRESS)
+ goto next;
+ goto recheck;
+ } else {
cachefiles_io_error_obj(
object,
"Readpage failed on backing file %lx",
(unsigned long) monitor->back_page->flags);
+ error = -EIO;
+ }
page_cache_release(monitor->back_page);
fscache_put_retrieval(op);
kfree(monitor);
+ next:
/* let the thread pool have some air occasionally */
max--;
if (max < 0 || need_resched()) {
shift = PAGE_SHIFT - inode->i_sb->s_blocksize_bits;
- op->op.flags = FSCACHE_OP_FAST;
+ op->op.flags &= FSCACHE_OP_KEEP_FLAGS;
+ op->op.flags |= FSCACHE_OP_FAST;
op->op.processor = cachefiles_read_copier;
pagevec_init(&pagevec, 0);
pagevec_init(&pagevec, 0);
- op->op.flags = FSCACHE_OP_FAST;
+ op->op.flags &= FSCACHE_OP_KEEP_FLAGS;
+ op->op.flags |= FSCACHE_OP_FAST;
op->op.processor = cachefiles_read_copier;
INIT_LIST_HEAD(&backpages);
struct cachefiles_cache *cache;
mm_segment_t old_fs;
struct file *file;
- loff_t pos;
+ loff_t pos, eof;
+ size_t len;
void *data;
int ret;
ret = -EIO;
if (file->f_op->write) {
pos = (loff_t) page->index << PAGE_SHIFT;
+
+ /* we mustn't write more data than we have, so we have
+ * to beware of a partial page at EOF */
+ eof = object->fscache.store_limit_l;
+ len = PAGE_SIZE;
+ if (eof & ~PAGE_MASK) {
+ ASSERTCMP(pos, <, eof);
+ if (eof - pos < PAGE_SIZE) {
+ _debug("cut short %llx to %llx",
+ pos, eof);
+ len = eof - pos;
+ ASSERTCMP(pos + len, ==, eof);
+ }
+ }
+
data = kmap(page);
old_fs = get_fs();
set_fs(KERNEL_DS);
ret = file->f_op->write(
- file, (const void __user *) data, PAGE_SIZE,
- &pos);
+ file, (const void __user *) data, len, &pos);
set_fs(old_fs);
kunmap(page);
- if (ret != PAGE_SIZE)
+ if (ret != len)
ret = -EIO;
}
fput(file);
if (rc)
goto out_unregister_key_type;
#endif
- rc = slow_work_register_user();
+ rc = slow_work_register_user(THIS_MODULE);
if (rc)
goto out_unregister_resolver_key;
enabled by setting bits in /sys/modules/fscache/parameter/debug.
See Documentation/filesystems/caching/fscache.txt for more information.
+
+config FSCACHE_OBJECT_LIST
+ bool "Maintain global object list for debugging purposes"
+ depends on FSCACHE && PROC_FS
+ help
+ Maintain a global list of active fscache objects that can be
+ retrieved through /proc/fs/fscache/objects for debugging purposes
fscache-$(CONFIG_PROC_FS) += proc.o
fscache-$(CONFIG_FSCACHE_STATS) += stats.o
fscache-$(CONFIG_FSCACHE_HISTOGRAM) += histogram.o
+fscache-$(CONFIG_FSCACHE_OBJECT_LIST) += object-list.o
obj-$(CONFIG_FSCACHE) := fscache.o
spin_lock(&cache->object_list_lock);
list_add_tail(&ifsdef->cache_link, &cache->object_list);
spin_unlock(&cache->object_list_lock);
+ fscache_objlist_add(ifsdef);
/* add the cache's netfs definition index object to the top level index
* cookie as a known backing object */
/* make sure all pages pinned by operations on behalf of the netfs are
* written to disk */
+ fscache_stat(&fscache_n_cop_sync_cache);
cache->ops->sync_cache(cache);
+ fscache_stat_d(&fscache_n_cop_sync_cache);
/* dissociate all the netfs pages backed by this cache from the block
* mappings in the cache */
+ fscache_stat(&fscache_n_cop_dissociate_pages);
cache->ops->dissociate_pages(cache);
+ fscache_stat_d(&fscache_n_cop_dissociate_pages);
/* we now have to destroy all the active objects pertaining to this
* cache - which we do by passing them off to thread pool to be
memset(cookie, 0, sizeof(*cookie));
spin_lock_init(&cookie->lock);
+ spin_lock_init(&cookie->stores_lock);
INIT_HLIST_HEAD(&cookie->backing_objects);
}
cookie->netfs_data = netfs_data;
cookie->flags = 0;
- INIT_RADIX_TREE(&cookie->stores, GFP_NOFS);
+ /* radix tree insertion won't use the preallocation pool unless it's
+ * told it may not wait */
+ INIT_RADIX_TREE(&cookie->stores, GFP_NOFS & ~__GFP_WAIT);
switch (cookie->def->type) {
case FSCACHE_COOKIE_TYPE_INDEX:
/* ask the cache to allocate an object (we may end up with duplicate
* objects at this stage, but we sort that out later) */
+ fscache_stat(&fscache_n_cop_alloc_object);
object = cache->ops->alloc_object(cache, cookie);
+ fscache_stat_d(&fscache_n_cop_alloc_object);
if (IS_ERR(object)) {
fscache_stat(&fscache_n_object_no_alloc);
ret = PTR_ERR(object);
/* only attach if we managed to allocate all we needed, otherwise
* discard the object we just allocated and instead use the one
* attached to the cookie */
- if (fscache_attach_object(cookie, object) < 0)
+ if (fscache_attach_object(cookie, object) < 0) {
+ fscache_stat(&fscache_n_cop_put_object);
cache->ops->put_object(object);
+ fscache_stat_d(&fscache_n_cop_put_object);
+ }
_leave(" = 0");
return 0;
return 0;
error_put:
+ fscache_stat(&fscache_n_cop_put_object);
cache->ops->put_object(object);
+ fscache_stat_d(&fscache_n_cop_put_object);
error:
_leave(" = %d", ret);
return ret;
object->cookie = cookie;
atomic_inc(&cookie->usage);
hlist_add_head(&object->cookie_link, &cookie->backing_objects);
+
+ fscache_objlist_add(object);
ret = 0;
cant_attach_object:
unsigned long event;
fscache_stat(&fscache_n_relinquishes);
+ if (retire)
+ fscache_stat(&fscache_n_relinquishes_retire);
if (!cookie) {
fscache_stat(&fscache_n_relinquishes_null);
event = retire ? FSCACHE_OBJECT_EV_RETIRE : FSCACHE_OBJECT_EV_RELEASE;
- /* detach pointers back to the netfs */
spin_lock(&cookie->lock);
- cookie->netfs_data = NULL;
- cookie->def = NULL;
-
/* break links with all the active objects */
while (!hlist_empty(&cookie->backing_objects)) {
object = hlist_entry(cookie->backing_objects.first,
BUG();
}
+ /* detach pointers back to the netfs */
+ cookie->netfs_data = NULL;
+ cookie->def = NULL;
+
spin_unlock(&cookie->lock);
if (cookie->parent) {
* - cache->object_list_lock
* - object->lock
* - object->parent->lock
+ * - cookie->stores_lock
* - fscache_thread_lock
*
*/
/*
* object.c
*/
+extern const char fscache_object_states_short[FSCACHE_OBJECT__NSTATES][5];
+
extern void fscache_withdrawing_object(struct fscache_cache *,
struct fscache_object *);
extern void fscache_enqueue_object(struct fscache_object *);
+/*
+ * object-list.c
+ */
+#ifdef CONFIG_FSCACHE_OBJECT_LIST
+extern const struct file_operations fscache_objlist_fops;
+
+extern void fscache_objlist_add(struct fscache_object *);
+#else
+#define fscache_objlist_add(object) do {} while(0)
+#endif
+
/*
* operation.c
*/
struct fscache_operation *);
extern int fscache_submit_op(struct fscache_object *,
struct fscache_operation *);
+extern int fscache_cancel_op(struct fscache_operation *);
extern void fscache_abort_object(struct fscache_object *);
extern void fscache_start_operations(struct fscache_object *);
extern void fscache_operation_gc(struct work_struct *);
extern atomic_t fscache_n_op_deferred_release;
extern atomic_t fscache_n_op_release;
extern atomic_t fscache_n_op_gc;
+extern atomic_t fscache_n_op_cancelled;
+extern atomic_t fscache_n_op_rejected;
extern atomic_t fscache_n_attr_changed;
extern atomic_t fscache_n_attr_changed_ok;
extern atomic_t fscache_n_allocs_ok;
extern atomic_t fscache_n_allocs_wait;
extern atomic_t fscache_n_allocs_nobufs;
+extern atomic_t fscache_n_allocs_intr;
+extern atomic_t fscache_n_allocs_object_dead;
extern atomic_t fscache_n_alloc_ops;
extern atomic_t fscache_n_alloc_op_waits;
extern atomic_t fscache_n_retrievals_nobufs;
extern atomic_t fscache_n_retrievals_intr;
extern atomic_t fscache_n_retrievals_nomem;
+extern atomic_t fscache_n_retrievals_object_dead;
extern atomic_t fscache_n_retrieval_ops;
extern atomic_t fscache_n_retrieval_op_waits;
extern atomic_t fscache_n_stores_oom;
extern atomic_t fscache_n_store_ops;
extern atomic_t fscache_n_store_calls;
+extern atomic_t fscache_n_store_pages;
+extern atomic_t fscache_n_store_radix_deletes;
+extern atomic_t fscache_n_store_pages_over_limit;
+
+extern atomic_t fscache_n_store_vmscan_not_storing;
+extern atomic_t fscache_n_store_vmscan_gone;
+extern atomic_t fscache_n_store_vmscan_busy;
+extern atomic_t fscache_n_store_vmscan_cancelled;
extern atomic_t fscache_n_marks;
extern atomic_t fscache_n_uncaches;
extern atomic_t fscache_n_relinquishes;
extern atomic_t fscache_n_relinquishes_null;
extern atomic_t fscache_n_relinquishes_waitcrt;
+extern atomic_t fscache_n_relinquishes_retire;
extern atomic_t fscache_n_cookie_index;
extern atomic_t fscache_n_cookie_data;
extern atomic_t fscache_n_object_lookups;
extern atomic_t fscache_n_object_lookups_negative;
extern atomic_t fscache_n_object_lookups_positive;
+extern atomic_t fscache_n_object_lookups_timed_out;
extern atomic_t fscache_n_object_created;
extern atomic_t fscache_n_object_avail;
extern atomic_t fscache_n_object_dead;
extern atomic_t fscache_n_checkaux_update;
extern atomic_t fscache_n_checkaux_obsolete;
+extern atomic_t fscache_n_cop_alloc_object;
+extern atomic_t fscache_n_cop_lookup_object;
+extern atomic_t fscache_n_cop_lookup_complete;
+extern atomic_t fscache_n_cop_grab_object;
+extern atomic_t fscache_n_cop_update_object;
+extern atomic_t fscache_n_cop_drop_object;
+extern atomic_t fscache_n_cop_put_object;
+extern atomic_t fscache_n_cop_sync_cache;
+extern atomic_t fscache_n_cop_attr_changed;
+extern atomic_t fscache_n_cop_read_or_alloc_page;
+extern atomic_t fscache_n_cop_read_or_alloc_pages;
+extern atomic_t fscache_n_cop_allocate_page;
+extern atomic_t fscache_n_cop_allocate_pages;
+extern atomic_t fscache_n_cop_write_page;
+extern atomic_t fscache_n_cop_uncache_page;
+extern atomic_t fscache_n_cop_dissociate_pages;
+
static inline void fscache_stat(atomic_t *stat)
{
atomic_inc(stat);
}
+static inline void fscache_stat_d(atomic_t *stat)
+{
+ atomic_dec(stat);
+}
+
+#define __fscache_stat(stat) (stat)
+
extern const struct file_operations fscache_stats_fops;
#else
+#define __fscache_stat(stat) (NULL)
#define fscache_stat(stat) do {} while (0)
+#define fscache_stat_d(stat) do {} while (0)
#endif
/*
{
int ret;
- ret = slow_work_register_user();
+ ret = slow_work_register_user(THIS_MODULE);
if (ret < 0)
goto error_slow_work;
error_cookie_jar:
fscache_proc_cleanup();
error_proc:
- slow_work_unregister_user();
+ slow_work_unregister_user(THIS_MODULE);
error_slow_work:
return ret;
}
kobject_put(fscache_root);
kmem_cache_destroy(fscache_cookie_jar);
fscache_proc_cleanup();
- slow_work_unregister_user();
+ slow_work_unregister_user(THIS_MODULE);
printk(KERN_NOTICE "FS-Cache: Unloaded\n");
}
--- /dev/null
+/* Global fscache object list maintainer and viewer
+ *
+ * Copyright (C) 2009 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#define FSCACHE_DEBUG_LEVEL COOKIE
+#include <linux/module.h>
+#include <linux/seq_file.h>
+#include <linux/key.h>
+#include <keys/user-type.h>
+#include "internal.h"
+
+static struct rb_root fscache_object_list;
+static DEFINE_RWLOCK(fscache_object_list_lock);
+
+struct fscache_objlist_data {
+ unsigned long config; /* display configuration */
+#define FSCACHE_OBJLIST_CONFIG_KEY 0x00000001 /* show object keys */
+#define FSCACHE_OBJLIST_CONFIG_AUX 0x00000002 /* show object auxdata */
+#define FSCACHE_OBJLIST_CONFIG_COOKIE 0x00000004 /* show objects with cookies */
+#define FSCACHE_OBJLIST_CONFIG_NOCOOKIE 0x00000008 /* show objects without cookies */
+#define FSCACHE_OBJLIST_CONFIG_BUSY 0x00000010 /* show busy objects */
+#define FSCACHE_OBJLIST_CONFIG_IDLE 0x00000020 /* show idle objects */
+#define FSCACHE_OBJLIST_CONFIG_PENDWR 0x00000040 /* show objects with pending writes */
+#define FSCACHE_OBJLIST_CONFIG_NOPENDWR 0x00000080 /* show objects without pending writes */
+#define FSCACHE_OBJLIST_CONFIG_READS 0x00000100 /* show objects with active reads */
+#define FSCACHE_OBJLIST_CONFIG_NOREADS 0x00000200 /* show objects without active reads */
+#define FSCACHE_OBJLIST_CONFIG_EVENTS 0x00000400 /* show objects with events */
+#define FSCACHE_OBJLIST_CONFIG_NOEVENTS 0x00000800 /* show objects without no events */
+#define FSCACHE_OBJLIST_CONFIG_WORK 0x00001000 /* show objects with slow work */
+#define FSCACHE_OBJLIST_CONFIG_NOWORK 0x00002000 /* show objects without slow work */
+
+ u8 buf[512]; /* key and aux data buffer */
+};
+
+/*
+ * Add an object to the object list
+ * - we use the address of the fscache_object structure as the key into the
+ * tree
+ */
+void fscache_objlist_add(struct fscache_object *obj)
+{
+ struct fscache_object *xobj;
+ struct rb_node **p = &fscache_object_list.rb_node, *parent = NULL;
+
+ write_lock(&fscache_object_list_lock);
+
+ while (*p) {
+ parent = *p;
+ xobj = rb_entry(parent, struct fscache_object, objlist_link);
+
+ if (obj < xobj)
+ p = &(*p)->rb_left;
+ else if (obj > xobj)
+ p = &(*p)->rb_right;
+ else
+ BUG();
+ }
+
+ rb_link_node(&obj->objlist_link, parent, p);
+ rb_insert_color(&obj->objlist_link, &fscache_object_list);
+
+ write_unlock(&fscache_object_list_lock);
+}
+
+/**
+ * fscache_object_destroy - Note that a cache object is about to be destroyed
+ * @object: The object to be destroyed
+ *
+ * Note the imminent destruction and deallocation of a cache object record.
+ */
+void fscache_object_destroy(struct fscache_object *obj)
+{
+ write_lock(&fscache_object_list_lock);
+
+ BUG_ON(RB_EMPTY_ROOT(&fscache_object_list));
+ rb_erase(&obj->objlist_link, &fscache_object_list);
+
+ write_unlock(&fscache_object_list_lock);
+}
+EXPORT_SYMBOL(fscache_object_destroy);
+
+/*
+ * find the object in the tree on or after the specified index
+ */
+static struct fscache_object *fscache_objlist_lookup(loff_t *_pos)
+{
+ struct fscache_object *pobj, *obj, *minobj = NULL;
+ struct rb_node *p;
+ unsigned long pos;
+
+ if (*_pos >= (unsigned long) ERR_PTR(-ENOENT))
+ return NULL;
+ pos = *_pos;
+
+ /* banners (can't represent line 0 by pos 0 as that would involve
+ * returning a NULL pointer) */
+ if (pos == 0)
+ return (struct fscache_object *) ++(*_pos);
+ if (pos < 3)
+ return (struct fscache_object *)pos;
+
+ pobj = (struct fscache_object *)pos;
+ p = fscache_object_list.rb_node;
+ while (p) {
+ obj = rb_entry(p, struct fscache_object, objlist_link);
+ if (pobj < obj) {
+ if (!minobj || minobj > obj)
+ minobj = obj;
+ p = p->rb_left;
+ } else if (pobj > obj) {
+ p = p->rb_right;
+ } else {
+ minobj = obj;
+ break;
+ }
+ obj = NULL;
+ }
+
+ if (!minobj)
+ *_pos = (unsigned long) ERR_PTR(-ENOENT);
+ else if (minobj != obj)
+ *_pos = (unsigned long) minobj;
+ return minobj;
+}
+
+/*
+ * set up the iterator to start reading from the first line
+ */
+static void *fscache_objlist_start(struct seq_file *m, loff_t *_pos)
+ __acquires(&fscache_object_list_lock)
+{
+ read_lock(&fscache_object_list_lock);
+ return fscache_objlist_lookup(_pos);
+}
+
+/*
+ * move to the next line
+ */
+static void *fscache_objlist_next(struct seq_file *m, void *v, loff_t *_pos)
+{
+ (*_pos)++;
+ return fscache_objlist_lookup(_pos);
+}
+
+/*
+ * clean up after reading
+ */
+static void fscache_objlist_stop(struct seq_file *m, void *v)
+ __releases(&fscache_object_list_lock)
+{
+ read_unlock(&fscache_object_list_lock);
+}
+
+/*
+ * display an object
+ */
+static int fscache_objlist_show(struct seq_file *m, void *v)
+{
+ struct fscache_objlist_data *data = m->private;
+ struct fscache_object *obj = v;
+ unsigned long config = data->config;
+ uint16_t keylen, auxlen;
+ char _type[3], *type;
+ bool no_cookie;
+ u8 *buf = data->buf, *p;
+
+ if ((unsigned long) v == 1) {
+ seq_puts(m, "OBJECT PARENT STAT CHLDN OPS OOP IPR EX READS"
+ " EM EV F S"
+ " | NETFS_COOKIE_DEF TY FL NETFS_DATA");
+ if (config & (FSCACHE_OBJLIST_CONFIG_KEY |
+ FSCACHE_OBJLIST_CONFIG_AUX))
+ seq_puts(m, " ");
+ if (config & FSCACHE_OBJLIST_CONFIG_KEY)
+ seq_puts(m, "OBJECT_KEY");
+ if ((config & (FSCACHE_OBJLIST_CONFIG_KEY |
+ FSCACHE_OBJLIST_CONFIG_AUX)) ==
+ (FSCACHE_OBJLIST_CONFIG_KEY | FSCACHE_OBJLIST_CONFIG_AUX))
+ seq_puts(m, ", ");
+ if (config & FSCACHE_OBJLIST_CONFIG_AUX)
+ seq_puts(m, "AUX_DATA");
+ seq_puts(m, "\n");
+ return 0;
+ }
+
+ if ((unsigned long) v == 2) {
+ seq_puts(m, "======== ======== ==== ===== === === === == ====="
+ " == == = ="
+ " | ================ == == ================");
+ if (config & (FSCACHE_OBJLIST_CONFIG_KEY |
+ FSCACHE_OBJLIST_CONFIG_AUX))
+ seq_puts(m, " ================");
+ seq_puts(m, "\n");
+ return 0;
+ }
+
+ /* filter out any unwanted objects */
+#define FILTER(criterion, _yes, _no) \
+ do { \
+ unsigned long yes = FSCACHE_OBJLIST_CONFIG_##_yes; \
+ unsigned long no = FSCACHE_OBJLIST_CONFIG_##_no; \
+ if (criterion) { \
+ if (!(config & yes)) \
+ return 0; \
+ } else { \
+ if (!(config & no)) \
+ return 0; \
+ } \
+ } while(0)
+
+ if (~config) {
+ FILTER(obj->cookie,
+ COOKIE, NOCOOKIE);
+ FILTER(obj->state != FSCACHE_OBJECT_ACTIVE ||
+ obj->n_ops != 0 ||
+ obj->n_obj_ops != 0 ||
+ obj->flags ||
+ !list_empty(&obj->dependents),
+ BUSY, IDLE);
+ FILTER(test_bit(FSCACHE_OBJECT_PENDING_WRITE, &obj->flags),
+ PENDWR, NOPENDWR);
+ FILTER(atomic_read(&obj->n_reads),
+ READS, NOREADS);
+ FILTER(obj->events & obj->event_mask,
+ EVENTS, NOEVENTS);
+ FILTER(obj->work.flags & ~(1UL << SLOW_WORK_VERY_SLOW),
+ WORK, NOWORK);
+ }
+
+ seq_printf(m,
+ "%8x %8x %s %5u %3u %3u %3u %2u %5u %2lx %2lx %1lx %1lx | ",
+ obj->debug_id,
+ obj->parent ? obj->parent->debug_id : -1,
+ fscache_object_states_short[obj->state],
+ obj->n_children,
+ obj->n_ops,
+ obj->n_obj_ops,
+ obj->n_in_progress,
+ obj->n_exclusive,
+ atomic_read(&obj->n_reads),
+ obj->event_mask & FSCACHE_OBJECT_EVENTS_MASK,
+ obj->events,
+ obj->flags,
+ obj->work.flags);
+
+ no_cookie = true;
+ keylen = auxlen = 0;
+ if (obj->cookie) {
+ spin_lock(&obj->lock);
+ if (obj->cookie) {
+ switch (obj->cookie->def->type) {
+ case 0:
+ type = "IX";
+ break;
+ case 1:
+ type = "DT";
+ break;
+ default:
+ sprintf(_type, "%02u",
+ obj->cookie->def->type);
+ type = _type;
+ break;
+ }
+
+ seq_printf(m, "%-16s %s %2lx %16p",
+ obj->cookie->def->name,
+ type,
+ obj->cookie->flags,
+ obj->cookie->netfs_data);
+
+ if (obj->cookie->def->get_key &&
+ config & FSCACHE_OBJLIST_CONFIG_KEY)
+ keylen = obj->cookie->def->get_key(
+ obj->cookie->netfs_data,
+ buf, 400);
+
+ if (obj->cookie->def->get_aux &&
+ config & FSCACHE_OBJLIST_CONFIG_AUX)
+ auxlen = obj->cookie->def->get_aux(
+ obj->cookie->netfs_data,
+ buf + keylen, 512 - keylen);
+
+ no_cookie = false;
+ }
+ spin_unlock(&obj->lock);
+
+ if (!no_cookie && (keylen > 0 || auxlen > 0)) {
+ seq_printf(m, " ");
+ for (p = buf; keylen > 0; keylen--)
+ seq_printf(m, "%02x", *p++);
+ if (auxlen > 0) {
+ if (config & FSCACHE_OBJLIST_CONFIG_KEY)
+ seq_printf(m, ", ");
+ for (; auxlen > 0; auxlen--)
+ seq_printf(m, "%02x", *p++);
+ }
+ }
+ }
+
+ if (no_cookie)
+ seq_printf(m, "<no_cookie>\n");
+ else
+ seq_printf(m, "\n");
+ return 0;
+}
+
+static const struct seq_operations fscache_objlist_ops = {
+ .start = fscache_objlist_start,
+ .stop = fscache_objlist_stop,
+ .next = fscache_objlist_next,
+ .show = fscache_objlist_show,
+};
+
+/*
+ * get the configuration for filtering the list
+ */
+static void fscache_objlist_config(struct fscache_objlist_data *data)
+{
+#ifdef CONFIG_KEYS
+ struct user_key_payload *confkey;
+ unsigned long config;
+ struct key *key;
+ const char *buf;
+ int len;
+
+ key = request_key(&key_type_user, "fscache:objlist", NULL);
+ if (IS_ERR(key))
+ goto no_config;
+
+ config = 0;
+ rcu_read_lock();
+
+ confkey = key->payload.data;
+ buf = confkey->data;
+
+ for (len = confkey->datalen - 1; len >= 0; len--) {
+ switch (buf[len]) {
+ case 'K': config |= FSCACHE_OBJLIST_CONFIG_KEY; break;
+ case 'A': config |= FSCACHE_OBJLIST_CONFIG_AUX; break;
+ case 'C': config |= FSCACHE_OBJLIST_CONFIG_COOKIE; break;
+ case 'c': config |= FSCACHE_OBJLIST_CONFIG_NOCOOKIE; break;
+ case 'B': config |= FSCACHE_OBJLIST_CONFIG_BUSY; break;
+ case 'b': config |= FSCACHE_OBJLIST_CONFIG_IDLE; break;
+ case 'W': config |= FSCACHE_OBJLIST_CONFIG_PENDWR; break;
+ case 'w': config |= FSCACHE_OBJLIST_CONFIG_NOPENDWR; break;
+ case 'R': config |= FSCACHE_OBJLIST_CONFIG_READS; break;
+ case 'r': config |= FSCACHE_OBJLIST_CONFIG_NOREADS; break;
+ case 'S': config |= FSCACHE_OBJLIST_CONFIG_WORK; break;
+ case 's': config |= FSCACHE_OBJLIST_CONFIG_NOWORK; break;
+ }
+ }
+
+ rcu_read_unlock();
+ key_put(key);
+
+ if (!(config & (FSCACHE_OBJLIST_CONFIG_COOKIE | FSCACHE_OBJLIST_CONFIG_NOCOOKIE)))
+ config |= FSCACHE_OBJLIST_CONFIG_COOKIE | FSCACHE_OBJLIST_CONFIG_NOCOOKIE;
+ if (!(config & (FSCACHE_OBJLIST_CONFIG_BUSY | FSCACHE_OBJLIST_CONFIG_IDLE)))
+ config |= FSCACHE_OBJLIST_CONFIG_BUSY | FSCACHE_OBJLIST_CONFIG_IDLE;
+ if (!(config & (FSCACHE_OBJLIST_CONFIG_PENDWR | FSCACHE_OBJLIST_CONFIG_NOPENDWR)))
+ config |= FSCACHE_OBJLIST_CONFIG_PENDWR | FSCACHE_OBJLIST_CONFIG_NOPENDWR;
+ if (!(config & (FSCACHE_OBJLIST_CONFIG_READS | FSCACHE_OBJLIST_CONFIG_NOREADS)))
+ config |= FSCACHE_OBJLIST_CONFIG_READS | FSCACHE_OBJLIST_CONFIG_NOREADS;
+ if (!(config & (FSCACHE_OBJLIST_CONFIG_EVENTS | FSCACHE_OBJLIST_CONFIG_NOEVENTS)))
+ config |= FSCACHE_OBJLIST_CONFIG_EVENTS | FSCACHE_OBJLIST_CONFIG_NOEVENTS;
+ if (!(config & (FSCACHE_OBJLIST_CONFIG_WORK | FSCACHE_OBJLIST_CONFIG_NOWORK)))
+ config |= FSCACHE_OBJLIST_CONFIG_WORK | FSCACHE_OBJLIST_CONFIG_NOWORK;
+
+ data->config = config;
+ return;
+
+no_config:
+#endif
+ data->config = ULONG_MAX;
+}
+
+/*
+ * open "/proc/fs/fscache/objects" to provide a list of active objects
+ * - can be configured by a user-defined key added to the caller's keyrings
+ */
+static int fscache_objlist_open(struct inode *inode, struct file *file)
+{
+ struct fscache_objlist_data *data;
+ struct seq_file *m;
+ int ret;
+
+ ret = seq_open(file, &fscache_objlist_ops);
+ if (ret < 0)
+ return ret;
+
+ m = file->private_data;
+
+ /* buffer for key extraction */
+ data = kmalloc(sizeof(struct fscache_objlist_data), GFP_KERNEL);
+ if (!data) {
+ seq_release(inode, file);
+ return -ENOMEM;
+ }
+
+ /* get the configuration key */
+ fscache_objlist_config(data);
+
+ m->private = data;
+ return 0;
+}
+
+/*
+ * clean up on close
+ */
+static int fscache_objlist_release(struct inode *inode, struct file *file)
+{
+ struct seq_file *m = file->private_data;
+
+ kfree(m->private);
+ m->private = NULL;
+ return seq_release(inode, file);
+}
+
+const struct file_operations fscache_objlist_fops = {
+ .owner = THIS_MODULE,
+ .open = fscache_objlist_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = fscache_objlist_release,
+};
#define FSCACHE_DEBUG_LEVEL COOKIE
#include <linux/module.h>
+#include <linux/seq_file.h>
#include "internal.h"
-const char *fscache_object_states[] = {
+const char *fscache_object_states[FSCACHE_OBJECT__NSTATES] = {
[FSCACHE_OBJECT_INIT] = "OBJECT_INIT",
[FSCACHE_OBJECT_LOOKING_UP] = "OBJECT_LOOKING_UP",
[FSCACHE_OBJECT_CREATING] = "OBJECT_CREATING",
};
EXPORT_SYMBOL(fscache_object_states);
+const char fscache_object_states_short[FSCACHE_OBJECT__NSTATES][5] = {
+ [FSCACHE_OBJECT_INIT] = "INIT",
+ [FSCACHE_OBJECT_LOOKING_UP] = "LOOK",
+ [FSCACHE_OBJECT_CREATING] = "CRTN",
+ [FSCACHE_OBJECT_AVAILABLE] = "AVBL",
+ [FSCACHE_OBJECT_ACTIVE] = "ACTV",
+ [FSCACHE_OBJECT_UPDATING] = "UPDT",
+ [FSCACHE_OBJECT_DYING] = "DYNG",
+ [FSCACHE_OBJECT_LC_DYING] = "LCDY",
+ [FSCACHE_OBJECT_ABORT_INIT] = "ABTI",
+ [FSCACHE_OBJECT_RELEASING] = "RELS",
+ [FSCACHE_OBJECT_RECYCLING] = "RCYC",
+ [FSCACHE_OBJECT_WITHDRAWING] = "WTHD",
+ [FSCACHE_OBJECT_DEAD] = "DEAD",
+};
+
static void fscache_object_slow_work_put_ref(struct slow_work *);
static int fscache_object_slow_work_get_ref(struct slow_work *);
static void fscache_object_slow_work_execute(struct slow_work *);
+#ifdef CONFIG_SLOW_WORK_PROC
+static void fscache_object_slow_work_desc(struct slow_work *, struct seq_file *);
+#endif
static void fscache_initialise_object(struct fscache_object *);
static void fscache_lookup_object(struct fscache_object *);
static void fscache_object_available(struct fscache_object *);
static void fscache_dequeue_object(struct fscache_object *);
const struct slow_work_ops fscache_object_slow_work_ops = {
+ .owner = THIS_MODULE,
.get_ref = fscache_object_slow_work_get_ref,
.put_ref = fscache_object_slow_work_put_ref,
.execute = fscache_object_slow_work_execute,
+#ifdef CONFIG_SLOW_WORK_PROC
+ .desc = fscache_object_slow_work_desc,
+#endif
};
EXPORT_SYMBOL(fscache_object_slow_work_ops);
static void fscache_object_state_machine(struct fscache_object *object)
{
enum fscache_object_state new_state;
+ struct fscache_cookie *cookie;
ASSERT(object != NULL);
case FSCACHE_OBJECT_UPDATING:
clear_bit(FSCACHE_OBJECT_EV_UPDATE, &object->events);
fscache_stat(&fscache_n_updates_run);
+ fscache_stat(&fscache_n_cop_update_object);
object->cache->ops->update_object(object);
+ fscache_stat_d(&fscache_n_cop_update_object);
goto active_transit;
/* handle an object dying during lookup or creation */
case FSCACHE_OBJECT_LC_DYING:
object->event_mask &= ~(1 << FSCACHE_OBJECT_EV_UPDATE);
+ fscache_stat(&fscache_n_cop_lookup_complete);
object->cache->ops->lookup_complete(object);
+ fscache_stat_d(&fscache_n_cop_lookup_complete);
spin_lock(&object->lock);
object->state = FSCACHE_OBJECT_DYING;
- if (test_and_clear_bit(FSCACHE_COOKIE_CREATING,
- &object->cookie->flags))
- wake_up_bit(&object->cookie->flags,
- FSCACHE_COOKIE_CREATING);
+ cookie = object->cookie;
+ if (cookie) {
+ if (test_and_clear_bit(FSCACHE_COOKIE_LOOKING_UP,
+ &cookie->flags))
+ wake_up_bit(&cookie->flags,
+ FSCACHE_COOKIE_LOOKING_UP);
+ if (test_and_clear_bit(FSCACHE_COOKIE_CREATING,
+ &cookie->flags))
+ wake_up_bit(&cookie->flags,
+ FSCACHE_COOKIE_CREATING);
+ }
spin_unlock(&object->lock);
fscache_done_parent_op(object);
}
spin_unlock(&object->lock);
fscache_enqueue_dependents(object);
+ fscache_start_operations(object);
goto terminal_transit;
/* handle an abort during initialisation */
_enter("{OBJ%x}", object->debug_id);
- clear_bit(FSCACHE_OBJECT_EV_REQUEUE, &object->events);
-
start = jiffies;
fscache_object_state_machine(object);
fscache_hist(fscache_objs_histogram, start);
if (object->events & object->event_mask)
fscache_enqueue_object(object);
+ clear_bit(FSCACHE_OBJECT_EV_REQUEUE, &object->events);
+}
+
+/*
+ * describe an object for slow-work debugging
+ */
+#ifdef CONFIG_SLOW_WORK_PROC
+static void fscache_object_slow_work_desc(struct slow_work *work,
+ struct seq_file *m)
+{
+ struct fscache_object *object =
+ container_of(work, struct fscache_object, work);
+
+ seq_printf(m, "FSC: OBJ%x: %s",
+ object->debug_id,
+ fscache_object_states_short[object->state]);
}
+#endif
/*
* initialise an object
* binding on to us, so we need to make sure we don't
* add ourself to the list multiple times */
if (list_empty(&object->dep_link)) {
+ fscache_stat(&fscache_n_cop_grab_object);
object->cache->ops->grab_object(object);
+ fscache_stat_d(&fscache_n_cop_grab_object);
list_add(&object->dep_link,
&parent->dependents);
{
struct fscache_cookie *cookie = object->cookie;
struct fscache_object *parent;
+ int ret;
_enter("");
object->cache->tag->name);
fscache_stat(&fscache_n_object_lookups);
- object->cache->ops->lookup_object(object);
+ fscache_stat(&fscache_n_cop_lookup_object);
+ ret = object->cache->ops->lookup_object(object);
+ fscache_stat_d(&fscache_n_cop_lookup_object);
if (test_bit(FSCACHE_OBJECT_EV_ERROR, &object->events))
set_bit(FSCACHE_COOKIE_UNAVAILABLE, &cookie->flags);
+ if (ret == -ETIMEDOUT) {
+ /* probably stuck behind another object, so move this one to
+ * the back of the queue */
+ fscache_stat(&fscache_n_object_lookups_timed_out);
+ set_bit(FSCACHE_OBJECT_EV_REQUEUE, &object->events);
+ }
+
_leave("");
}
spin_lock(&object->lock);
- if (test_and_clear_bit(FSCACHE_COOKIE_CREATING, &object->cookie->flags))
+ if (object->cookie &&
+ test_and_clear_bit(FSCACHE_COOKIE_CREATING, &object->cookie->flags))
wake_up_bit(&object->cookie->flags, FSCACHE_COOKIE_CREATING);
fscache_done_parent_op(object);
}
spin_unlock(&object->lock);
+ fscache_stat(&fscache_n_cop_lookup_complete);
object->cache->ops->lookup_complete(object);
+ fscache_stat_d(&fscache_n_cop_lookup_complete);
fscache_enqueue_dependents(object);
fscache_hist(fscache_obj_instantiate_histogram, object->lookup_jif);
_enter("{OBJ%x,%d}", object->debug_id, object->n_children);
+ ASSERTCMP(object->cookie, ==, NULL);
+ ASSERT(hlist_unhashed(&object->cookie_link));
+
spin_lock(&cache->object_list_lock);
list_del_init(&object->cache_link);
spin_unlock(&cache->object_list_lock);
+ fscache_stat(&fscache_n_cop_drop_object);
cache->ops->drop_object(object);
+ fscache_stat_d(&fscache_n_cop_drop_object);
if (parent) {
_debug("release parent OBJ%x {%d}",
}
/* this just shifts the object release to the slow work processor */
+ fscache_stat(&fscache_n_cop_put_object);
object->cache->ops->put_object(object);
+ fscache_stat_d(&fscache_n_cop_put_object);
_leave("");
}
{
struct fscache_object *object =
container_of(work, struct fscache_object, work);
+ int ret;
- return object->cache->ops->grab_object(object) ? 0 : -EAGAIN;
+ fscache_stat(&fscache_n_cop_grab_object);
+ ret = object->cache->ops->grab_object(object) ? 0 : -EAGAIN;
+ fscache_stat_d(&fscache_n_cop_grab_object);
+ return ret;
}
/*
struct fscache_object *object =
container_of(work, struct fscache_object, work);
- return object->cache->ops->put_object(object);
+ fscache_stat(&fscache_n_cop_put_object);
+ object->cache->ops->put_object(object);
+ fscache_stat_d(&fscache_n_cop_put_object);
}
/*
/* sort onto appropriate lists */
fscache_enqueue_object(dep);
+ fscache_stat(&fscache_n_cop_put_object);
dep->cache->ops->put_object(dep);
+ fscache_stat_d(&fscache_n_cop_put_object);
if (!list_empty(&object->dependents))
cond_resched_lock(&object->lock);
#define FSCACHE_DEBUG_LEVEL OPERATION
#include <linux/module.h>
+#include <linux/seq_file.h>
#include "internal.h"
atomic_t fscache_op_debug_id;
_enter("{OBJ%x OP%x,%u}",
op->object->debug_id, op->debug_id, atomic_read(&op->usage));
+ fscache_set_op_state(op, "EnQ");
+
+ ASSERT(list_empty(&op->pend_link));
ASSERT(op->processor != NULL);
ASSERTCMP(op->object->state, >=, FSCACHE_OBJECT_AVAILABLE);
ASSERTCMP(atomic_read(&op->usage), >, 0);
- if (list_empty(&op->pend_link)) {
- switch (op->flags & FSCACHE_OP_TYPE) {
- case FSCACHE_OP_FAST:
- _debug("queue fast");
- atomic_inc(&op->usage);
- if (!schedule_work(&op->fast_work))
- fscache_put_operation(op);
- break;
- case FSCACHE_OP_SLOW:
- _debug("queue slow");
- slow_work_enqueue(&op->slow_work);
- break;
- case FSCACHE_OP_MYTHREAD:
- _debug("queue for caller's attention");
- break;
- default:
- printk(KERN_ERR "FS-Cache: Unexpected op type %lx",
- op->flags);
- BUG();
- break;
- }
- fscache_stat(&fscache_n_op_enqueue);
+ fscache_stat(&fscache_n_op_enqueue);
+ switch (op->flags & FSCACHE_OP_TYPE) {
+ case FSCACHE_OP_FAST:
+ _debug("queue fast");
+ atomic_inc(&op->usage);
+ if (!schedule_work(&op->fast_work))
+ fscache_put_operation(op);
+ break;
+ case FSCACHE_OP_SLOW:
+ _debug("queue slow");
+ slow_work_enqueue(&op->slow_work);
+ break;
+ case FSCACHE_OP_MYTHREAD:
+ _debug("queue for caller's attention");
+ break;
+ default:
+ printk(KERN_ERR "FS-Cache: Unexpected op type %lx",
+ op->flags);
+ BUG();
+ break;
}
}
EXPORT_SYMBOL(fscache_enqueue_operation);
static void fscache_run_op(struct fscache_object *object,
struct fscache_operation *op)
{
+ fscache_set_op_state(op, "Run");
+
object->n_in_progress++;
if (test_and_clear_bit(FSCACHE_OP_WAITING, &op->flags))
wake_up_bit(&op->flags, FSCACHE_OP_WAITING);
_enter("{OBJ%x OP%x},", object->debug_id, op->debug_id);
+ fscache_set_op_state(op, "SubmitX");
+
spin_lock(&object->lock);
ASSERTCMP(object->n_ops, >=, object->n_in_progress);
ASSERTCMP(object->n_ops, >=, object->n_exclusive);
+ ASSERT(list_empty(&op->pend_link));
ret = -ENOBUFS;
if (fscache_object_is_active(object)) {
ASSERTCMP(atomic_read(&op->usage), >, 0);
+ fscache_set_op_state(op, "Submit");
+
spin_lock(&object->lock);
ASSERTCMP(object->n_ops, >=, object->n_in_progress);
ASSERTCMP(object->n_ops, >=, object->n_exclusive);
+ ASSERT(list_empty(&op->pend_link));
ostate = object->state;
smp_rmb();
list_add_tail(&op->pend_link, &object->pending_ops);
fscache_stat(&fscache_n_op_pend);
ret = 0;
+ } else if (object->state == FSCACHE_OBJECT_DYING ||
+ object->state == FSCACHE_OBJECT_LC_DYING ||
+ object->state == FSCACHE_OBJECT_WITHDRAWING) {
+ fscache_stat(&fscache_n_op_rejected);
+ ret = -ENOBUFS;
} else if (!test_bit(FSCACHE_IOERROR, &object->cache->flags)) {
fscache_report_unexpected_submission(object, op, ostate);
ASSERT(!fscache_object_is_active(object));
stop = true;
}
list_del_init(&op->pend_link);
- object->n_in_progress++;
-
- if (test_and_clear_bit(FSCACHE_OP_WAITING, &op->flags))
- wake_up_bit(&op->flags, FSCACHE_OP_WAITING);
- if (op->processor)
- fscache_enqueue_operation(op);
+ fscache_run_op(object, op);
/* the pending queue was holding a ref on the object */
fscache_put_operation(op);
object->n_in_progress, object->debug_id);
}
+/*
+ * cancel an operation that's pending on an object
+ */
+int fscache_cancel_op(struct fscache_operation *op)
+{
+ struct fscache_object *object = op->object;
+ int ret;
+
+ _enter("OBJ%x OP%x}", op->object->debug_id, op->debug_id);
+
+ spin_lock(&object->lock);
+
+ ret = -EBUSY;
+ if (!list_empty(&op->pend_link)) {
+ fscache_stat(&fscache_n_op_cancelled);
+ list_del_init(&op->pend_link);
+ object->n_ops--;
+ if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags))
+ object->n_exclusive--;
+ if (test_and_clear_bit(FSCACHE_OP_WAITING, &op->flags))
+ wake_up_bit(&op->flags, FSCACHE_OP_WAITING);
+ fscache_put_operation(op);
+ ret = 0;
+ }
+
+ spin_unlock(&object->lock);
+ _leave(" = %d", ret);
+ return ret;
+}
+
/*
* release an operation
* - queues pending ops if this is the last in-progress op
if (!atomic_dec_and_test(&op->usage))
return;
+ fscache_set_op_state(op, "Put");
+
_debug("PUT OP");
if (test_and_set_bit(FSCACHE_OP_DEAD, &op->flags))
BUG();
object = op->object;
+ if (test_bit(FSCACHE_OP_DEC_READ_CNT, &op->flags))
+ atomic_dec(&object->n_reads);
+
/* now... we may get called with the object spinlock held, so we
* complete the cleanup here only if we can immediately acquire the
* lock, and defer it otherwise */
_leave("");
}
+/*
+ * describe an operation for slow-work debugging
+ */
+#ifdef CONFIG_SLOW_WORK_PROC
+static void fscache_op_desc(struct slow_work *work, struct seq_file *m)
+{
+ struct fscache_operation *op =
+ container_of(work, struct fscache_operation, slow_work);
+
+ seq_printf(m, "FSC: OBJ%x OP%x: %s/%s fl=%lx",
+ op->object->debug_id, op->debug_id,
+ op->name, op->state, op->flags);
+}
+#endif
+
const struct slow_work_ops fscache_op_slow_work_ops = {
+ .owner = THIS_MODULE,
.get_ref = fscache_op_get_ref,
.put_ref = fscache_op_put_ref,
.execute = fscache_op_execute,
+#ifdef CONFIG_SLOW_WORK_PROC
+ .desc = fscache_op_desc,
+#endif
};
EXPORT_SYMBOL(__fscache_wait_on_page_write);
/*
- * note that a page has finished being written to the cache
+ * decide whether a page can be released, possibly by cancelling a store to it
+ * - we're allowed to sleep if __GFP_WAIT is flagged
*/
-static void fscache_end_page_write(struct fscache_cookie *cookie, struct page *page)
+bool __fscache_maybe_release_page(struct fscache_cookie *cookie,
+ struct page *page,
+ gfp_t gfp)
{
struct page *xpage;
+ void *val;
+
+ _enter("%p,%p,%x", cookie, page, gfp);
+
+ rcu_read_lock();
+ val = radix_tree_lookup(&cookie->stores, page->index);
+ if (!val) {
+ rcu_read_unlock();
+ fscache_stat(&fscache_n_store_vmscan_not_storing);
+ __fscache_uncache_page(cookie, page);
+ return true;
+ }
+
+ /* see if the page is actually undergoing storage - if so we can't get
+ * rid of it till the cache has finished with it */
+ if (radix_tree_tag_get(&cookie->stores, page->index,
+ FSCACHE_COOKIE_STORING_TAG)) {
+ rcu_read_unlock();
+ goto page_busy;
+ }
+
+ /* the page is pending storage, so we attempt to cancel the store and
+ * discard the store request so that the page can be reclaimed */
+ spin_lock(&cookie->stores_lock);
+ rcu_read_unlock();
+
+ if (radix_tree_tag_get(&cookie->stores, page->index,
+ FSCACHE_COOKIE_STORING_TAG)) {
+ /* the page started to undergo storage whilst we were looking,
+ * so now we can only wait or return */
+ spin_unlock(&cookie->stores_lock);
+ goto page_busy;
+ }
- spin_lock(&cookie->lock);
xpage = radix_tree_delete(&cookie->stores, page->index);
- spin_unlock(&cookie->lock);
- ASSERT(xpage != NULL);
+ spin_unlock(&cookie->stores_lock);
+
+ if (xpage) {
+ fscache_stat(&fscache_n_store_vmscan_cancelled);
+ fscache_stat(&fscache_n_store_radix_deletes);
+ ASSERTCMP(xpage, ==, page);
+ } else {
+ fscache_stat(&fscache_n_store_vmscan_gone);
+ }
wake_up_bit(&cookie->flags, 0);
+ if (xpage)
+ page_cache_release(xpage);
+ __fscache_uncache_page(cookie, page);
+ return true;
+
+page_busy:
+ /* we might want to wait here, but that could deadlock the allocator as
+ * the slow-work threads writing to the cache may all end up sleeping
+ * on memory allocation */
+ fscache_stat(&fscache_n_store_vmscan_busy);
+ return false;
+}
+EXPORT_SYMBOL(__fscache_maybe_release_page);
+
+/*
+ * note that a page has finished being written to the cache
+ */
+static void fscache_end_page_write(struct fscache_object *object,
+ struct page *page)
+{
+ struct fscache_cookie *cookie;
+ struct page *xpage = NULL;
+
+ spin_lock(&object->lock);
+ cookie = object->cookie;
+ if (cookie) {
+ /* delete the page from the tree if it is now no longer
+ * pending */
+ spin_lock(&cookie->stores_lock);
+ radix_tree_tag_clear(&cookie->stores, page->index,
+ FSCACHE_COOKIE_STORING_TAG);
+ if (!radix_tree_tag_get(&cookie->stores, page->index,
+ FSCACHE_COOKIE_PENDING_TAG)) {
+ fscache_stat(&fscache_n_store_radix_deletes);
+ xpage = radix_tree_delete(&cookie->stores, page->index);
+ }
+ spin_unlock(&cookie->stores_lock);
+ wake_up_bit(&cookie->flags, 0);
+ }
+ spin_unlock(&object->lock);
+ if (xpage)
+ page_cache_release(xpage);
}
/*
static void fscache_attr_changed_op(struct fscache_operation *op)
{
struct fscache_object *object = op->object;
+ int ret;
_enter("{OBJ%x OP%x}", object->debug_id, op->debug_id);
fscache_stat(&fscache_n_attr_changed_calls);
- if (fscache_object_is_active(object) &&
- object->cache->ops->attr_changed(object) < 0)
- fscache_abort_object(object);
+ if (fscache_object_is_active(object)) {
+ fscache_set_op_state(op, "CallFS");
+ fscache_stat(&fscache_n_cop_attr_changed);
+ ret = object->cache->ops->attr_changed(object);
+ fscache_stat_d(&fscache_n_cop_attr_changed);
+ fscache_set_op_state(op, "Done");
+ if (ret < 0)
+ fscache_abort_object(object);
+ }
_leave("");
}
fscache_operation_init(op, NULL);
fscache_operation_init_slow(op, fscache_attr_changed_op);
op->flags = FSCACHE_OP_SLOW | (1 << FSCACHE_OP_EXCLUSIVE);
+ fscache_set_op_name(op, "Attr");
spin_lock(&cookie->lock);
op->start_time = jiffies;
INIT_WORK(&op->op.fast_work, fscache_retrieval_work);
INIT_LIST_HEAD(&op->to_do);
+ fscache_set_op_name(&op->op, "Retr");
return op;
}
return 0;
}
+/*
+ * wait for an object to become active (or dead)
+ */
+static int fscache_wait_for_retrieval_activation(struct fscache_object *object,
+ struct fscache_retrieval *op,
+ atomic_t *stat_op_waits,
+ atomic_t *stat_object_dead)
+{
+ int ret;
+
+ if (!test_bit(FSCACHE_OP_WAITING, &op->op.flags))
+ goto check_if_dead;
+
+ _debug(">>> WT");
+ fscache_stat(stat_op_waits);
+ if (wait_on_bit(&op->op.flags, FSCACHE_OP_WAITING,
+ fscache_wait_bit_interruptible,
+ TASK_INTERRUPTIBLE) < 0) {
+ ret = fscache_cancel_op(&op->op);
+ if (ret == 0)
+ return -ERESTARTSYS;
+
+ /* it's been removed from the pending queue by another party,
+ * so we should get to run shortly */
+ wait_on_bit(&op->op.flags, FSCACHE_OP_WAITING,
+ fscache_wait_bit, TASK_UNINTERRUPTIBLE);
+ }
+ _debug("<<< GO");
+
+check_if_dead:
+ if (unlikely(fscache_object_is_dead(object))) {
+ fscache_stat(stat_object_dead);
+ return -ENOBUFS;
+ }
+ return 0;
+}
+
/*
* read a page from the cache or allocate a block in which to store it
* - we return:
_leave(" = -ENOMEM");
return -ENOMEM;
}
+ fscache_set_op_name(&op->op, "RetrRA1");
spin_lock(&cookie->lock);
ASSERTCMP(object->state, >, FSCACHE_OBJECT_LOOKING_UP);
+ atomic_inc(&object->n_reads);
+ set_bit(FSCACHE_OP_DEC_READ_CNT, &op->op.flags);
+
if (fscache_submit_op(object, &op->op) < 0)
goto nobufs_unlock;
spin_unlock(&cookie->lock);
/* we wait for the operation to become active, and then process it
* *here*, in this thread, and not in the thread pool */
- if (test_bit(FSCACHE_OP_WAITING, &op->op.flags)) {
- _debug(">>> WT");
- fscache_stat(&fscache_n_retrieval_op_waits);
- wait_on_bit(&op->op.flags, FSCACHE_OP_WAITING,
- fscache_wait_bit, TASK_UNINTERRUPTIBLE);
- _debug("<<< GO");
- }
+ ret = fscache_wait_for_retrieval_activation(
+ object, op,
+ __fscache_stat(&fscache_n_retrieval_op_waits),
+ __fscache_stat(&fscache_n_retrievals_object_dead));
+ if (ret < 0)
+ goto error;
/* ask the cache to honour the operation */
if (test_bit(FSCACHE_COOKIE_NO_DATA_YET, &object->cookie->flags)) {
+ fscache_stat(&fscache_n_cop_allocate_page);
ret = object->cache->ops->allocate_page(op, page, gfp);
+ fscache_stat_d(&fscache_n_cop_allocate_page);
if (ret == 0)
ret = -ENODATA;
} else {
+ fscache_stat(&fscache_n_cop_read_or_alloc_page);
ret = object->cache->ops->read_or_alloc_page(op, page, gfp);
+ fscache_stat_d(&fscache_n_cop_read_or_alloc_page);
}
+error:
if (ret == -ENOMEM)
fscache_stat(&fscache_n_retrievals_nomem);
else if (ret == -ERESTARTSYS)
void *context,
gfp_t gfp)
{
- fscache_pages_retrieval_func_t func;
struct fscache_retrieval *op;
struct fscache_object *object;
int ret;
op = fscache_alloc_retrieval(mapping, end_io_func, context);
if (!op)
return -ENOMEM;
+ fscache_set_op_name(&op->op, "RetrRAN");
spin_lock(&cookie->lock);
object = hlist_entry(cookie->backing_objects.first,
struct fscache_object, cookie_link);
+ atomic_inc(&object->n_reads);
+ set_bit(FSCACHE_OP_DEC_READ_CNT, &op->op.flags);
+
if (fscache_submit_op(object, &op->op) < 0)
goto nobufs_unlock;
spin_unlock(&cookie->lock);
/* we wait for the operation to become active, and then process it
* *here*, in this thread, and not in the thread pool */
- if (test_bit(FSCACHE_OP_WAITING, &op->op.flags)) {
- _debug(">>> WT");
- fscache_stat(&fscache_n_retrieval_op_waits);
- wait_on_bit(&op->op.flags, FSCACHE_OP_WAITING,
- fscache_wait_bit, TASK_UNINTERRUPTIBLE);
- _debug("<<< GO");
- }
+ ret = fscache_wait_for_retrieval_activation(
+ object, op,
+ __fscache_stat(&fscache_n_retrieval_op_waits),
+ __fscache_stat(&fscache_n_retrievals_object_dead));
+ if (ret < 0)
+ goto error;
/* ask the cache to honour the operation */
- if (test_bit(FSCACHE_COOKIE_NO_DATA_YET, &object->cookie->flags))
- func = object->cache->ops->allocate_pages;
- else
- func = object->cache->ops->read_or_alloc_pages;
- ret = func(op, pages, nr_pages, gfp);
+ if (test_bit(FSCACHE_COOKIE_NO_DATA_YET, &object->cookie->flags)) {
+ fscache_stat(&fscache_n_cop_allocate_pages);
+ ret = object->cache->ops->allocate_pages(
+ op, pages, nr_pages, gfp);
+ fscache_stat_d(&fscache_n_cop_allocate_pages);
+ } else {
+ fscache_stat(&fscache_n_cop_read_or_alloc_pages);
+ ret = object->cache->ops->read_or_alloc_pages(
+ op, pages, nr_pages, gfp);
+ fscache_stat_d(&fscache_n_cop_read_or_alloc_pages);
+ }
+error:
if (ret == -ENOMEM)
fscache_stat(&fscache_n_retrievals_nomem);
else if (ret == -ERESTARTSYS)
op = fscache_alloc_retrieval(page->mapping, NULL, NULL);
if (!op)
return -ENOMEM;
+ fscache_set_op_name(&op->op, "RetrAL1");
spin_lock(&cookie->lock);
fscache_stat(&fscache_n_alloc_ops);
- if (test_bit(FSCACHE_OP_WAITING, &op->op.flags)) {
- _debug(">>> WT");
- fscache_stat(&fscache_n_alloc_op_waits);
- wait_on_bit(&op->op.flags, FSCACHE_OP_WAITING,
- fscache_wait_bit, TASK_UNINTERRUPTIBLE);
- _debug("<<< GO");
- }
+ ret = fscache_wait_for_retrieval_activation(
+ object, op,
+ __fscache_stat(&fscache_n_alloc_op_waits),
+ __fscache_stat(&fscache_n_allocs_object_dead));
+ if (ret < 0)
+ goto error;
/* ask the cache to honour the operation */
+ fscache_stat(&fscache_n_cop_allocate_page);
ret = object->cache->ops->allocate_page(op, page, gfp);
+ fscache_stat_d(&fscache_n_cop_allocate_page);
- if (ret < 0)
+error:
+ if (ret == -ERESTARTSYS)
+ fscache_stat(&fscache_n_allocs_intr);
+ else if (ret < 0)
fscache_stat(&fscache_n_allocs_nobufs);
else
fscache_stat(&fscache_n_allocs_ok);
struct fscache_storage *op =
container_of(_op, struct fscache_storage, op);
struct fscache_object *object = op->op.object;
- struct fscache_cookie *cookie = object->cookie;
+ struct fscache_cookie *cookie;
struct page *page;
unsigned n;
void *results[1];
_enter("{OP%x,%d}", op->op.debug_id, atomic_read(&op->op.usage));
- spin_lock(&cookie->lock);
+ fscache_set_op_state(&op->op, "GetPage");
+
spin_lock(&object->lock);
+ cookie = object->cookie;
- if (!fscache_object_is_active(object)) {
+ if (!fscache_object_is_active(object) || !cookie) {
spin_unlock(&object->lock);
- spin_unlock(&cookie->lock);
_leave("");
return;
}
+ spin_lock(&cookie->stores_lock);
+
fscache_stat(&fscache_n_store_calls);
/* find a page to store */
goto superseded;
page = results[0];
_debug("gang %d [%lx]", n, page->index);
- if (page->index > op->store_limit)
+ if (page->index > op->store_limit) {
+ fscache_stat(&fscache_n_store_pages_over_limit);
goto superseded;
+ }
- radix_tree_tag_clear(&cookie->stores, page->index,
- FSCACHE_COOKIE_PENDING_TAG);
+ if (page) {
+ radix_tree_tag_set(&cookie->stores, page->index,
+ FSCACHE_COOKIE_STORING_TAG);
+ radix_tree_tag_clear(&cookie->stores, page->index,
+ FSCACHE_COOKIE_PENDING_TAG);
+ }
+ spin_unlock(&cookie->stores_lock);
spin_unlock(&object->lock);
- spin_unlock(&cookie->lock);
if (page) {
+ fscache_set_op_state(&op->op, "Store");
+ fscache_stat(&fscache_n_store_pages);
+ fscache_stat(&fscache_n_cop_write_page);
ret = object->cache->ops->write_page(op, page);
- fscache_end_page_write(cookie, page);
- page_cache_release(page);
- if (ret < 0)
+ fscache_stat_d(&fscache_n_cop_write_page);
+ fscache_set_op_state(&op->op, "EndWrite");
+ fscache_end_page_write(object, page);
+ if (ret < 0) {
+ fscache_set_op_state(&op->op, "Abort");
fscache_abort_object(object);
- else
+ } else {
fscache_enqueue_operation(&op->op);
+ }
}
_leave("");
/* this writer is going away and there aren't any more things to
* write */
_debug("cease");
+ spin_unlock(&cookie->stores_lock);
clear_bit(FSCACHE_OBJECT_PENDING_WRITE, &object->flags);
spin_unlock(&object->lock);
- spin_unlock(&cookie->lock);
_leave("");
}
fscache_operation_init(&op->op, fscache_release_write_op);
fscache_operation_init_slow(&op->op, fscache_write_op);
op->op.flags = FSCACHE_OP_SLOW | (1 << FSCACHE_OP_WAITING);
+ fscache_set_op_name(&op->op, "Write1");
ret = radix_tree_preload(gfp & ~__GFP_HIGHMEM);
if (ret < 0)
/* add the page to the pending-storage radix tree on the backing
* object */
spin_lock(&object->lock);
+ spin_lock(&cookie->stores_lock);
_debug("store limit %llx", (unsigned long long) object->store_limit);
if (test_and_set_bit(FSCACHE_OBJECT_PENDING_WRITE, &object->flags))
goto already_pending;
+ spin_unlock(&cookie->stores_lock);
spin_unlock(&object->lock);
op->op.debug_id = atomic_inc_return(&fscache_op_debug_id);
already_queued:
fscache_stat(&fscache_n_stores_again);
already_pending:
+ spin_unlock(&cookie->stores_lock);
spin_unlock(&object->lock);
spin_unlock(&cookie->lock);
radix_tree_preload_end();
return 0;
submit_failed:
+ spin_lock(&cookie->stores_lock);
radix_tree_delete(&cookie->stores, page->index);
+ spin_unlock(&cookie->stores_lock);
page_cache_release(page);
ret = -ENOBUFS;
goto nobufs;
if (TestClearPageFsCache(page) &&
object->cache->ops->uncache_page) {
/* the cache backend releases the cookie lock */
+ fscache_stat(&fscache_n_cop_uncache_page);
object->cache->ops->uncache_page(object, page);
+ fscache_stat_d(&fscache_n_cop_uncache_page);
goto done;
}
goto error_histogram;
#endif
+#ifdef CONFIG_FSCACHE_OBJECT_LIST
+ if (!proc_create("fs/fscache/objects", S_IFREG | 0444, NULL,
+ &fscache_objlist_fops))
+ goto error_objects;
+#endif
+
_leave(" = 0");
return 0;
+#ifdef CONFIG_FSCACHE_OBJECT_LIST
+error_objects:
+#endif
#ifdef CONFIG_FSCACHE_HISTOGRAM
+ remove_proc_entry("fs/fscache/histogram", NULL);
error_histogram:
#endif
#ifdef CONFIG_FSCACHE_STATS
*/
void fscache_proc_cleanup(void)
{
+#ifdef CONFIG_FSCACHE_OBJECT_LIST
+ remove_proc_entry("fs/fscache/objects", NULL);
+#endif
#ifdef CONFIG_FSCACHE_HISTOGRAM
remove_proc_entry("fs/fscache/histogram", NULL);
#endif
atomic_t fscache_n_op_deferred_release;
atomic_t fscache_n_op_release;
atomic_t fscache_n_op_gc;
+atomic_t fscache_n_op_cancelled;
+atomic_t fscache_n_op_rejected;
atomic_t fscache_n_attr_changed;
atomic_t fscache_n_attr_changed_ok;
atomic_t fscache_n_allocs_ok;
atomic_t fscache_n_allocs_wait;
atomic_t fscache_n_allocs_nobufs;
+atomic_t fscache_n_allocs_intr;
+atomic_t fscache_n_allocs_object_dead;
atomic_t fscache_n_alloc_ops;
atomic_t fscache_n_alloc_op_waits;
atomic_t fscache_n_retrievals_nobufs;
atomic_t fscache_n_retrievals_intr;
atomic_t fscache_n_retrievals_nomem;
+atomic_t fscache_n_retrievals_object_dead;
atomic_t fscache_n_retrieval_ops;
atomic_t fscache_n_retrieval_op_waits;
atomic_t fscache_n_stores_oom;
atomic_t fscache_n_store_ops;
atomic_t fscache_n_store_calls;
+atomic_t fscache_n_store_pages;
+atomic_t fscache_n_store_radix_deletes;
+atomic_t fscache_n_store_pages_over_limit;
+
+atomic_t fscache_n_store_vmscan_not_storing;
+atomic_t fscache_n_store_vmscan_gone;
+atomic_t fscache_n_store_vmscan_busy;
+atomic_t fscache_n_store_vmscan_cancelled;
atomic_t fscache_n_marks;
atomic_t fscache_n_uncaches;
atomic_t fscache_n_relinquishes;
atomic_t fscache_n_relinquishes_null;
atomic_t fscache_n_relinquishes_waitcrt;
+atomic_t fscache_n_relinquishes_retire;
atomic_t fscache_n_cookie_index;
atomic_t fscache_n_cookie_data;
atomic_t fscache_n_object_lookups;
atomic_t fscache_n_object_lookups_negative;
atomic_t fscache_n_object_lookups_positive;
+atomic_t fscache_n_object_lookups_timed_out;
atomic_t fscache_n_object_created;
atomic_t fscache_n_object_avail;
atomic_t fscache_n_object_dead;
atomic_t fscache_n_checkaux_update;
atomic_t fscache_n_checkaux_obsolete;
+atomic_t fscache_n_cop_alloc_object;
+atomic_t fscache_n_cop_lookup_object;
+atomic_t fscache_n_cop_lookup_complete;
+atomic_t fscache_n_cop_grab_object;
+atomic_t fscache_n_cop_update_object;
+atomic_t fscache_n_cop_drop_object;
+atomic_t fscache_n_cop_put_object;
+atomic_t fscache_n_cop_sync_cache;
+atomic_t fscache_n_cop_attr_changed;
+atomic_t fscache_n_cop_read_or_alloc_page;
+atomic_t fscache_n_cop_read_or_alloc_pages;
+atomic_t fscache_n_cop_allocate_page;
+atomic_t fscache_n_cop_allocate_pages;
+atomic_t fscache_n_cop_write_page;
+atomic_t fscache_n_cop_uncache_page;
+atomic_t fscache_n_cop_dissociate_pages;
+
/*
* display the general statistics
*/
atomic_read(&fscache_n_acquires_nobufs),
atomic_read(&fscache_n_acquires_oom));
- seq_printf(m, "Lookups: n=%u neg=%u pos=%u crt=%u\n",
+ seq_printf(m, "Lookups: n=%u neg=%u pos=%u crt=%u tmo=%u\n",
atomic_read(&fscache_n_object_lookups),
atomic_read(&fscache_n_object_lookups_negative),
atomic_read(&fscache_n_object_lookups_positive),
+ atomic_read(&fscache_n_object_lookups_timed_out),
atomic_read(&fscache_n_object_created));
seq_printf(m, "Updates: n=%u nul=%u run=%u\n",
atomic_read(&fscache_n_updates_null),
atomic_read(&fscache_n_updates_run));
- seq_printf(m, "Relinqs: n=%u nul=%u wcr=%u\n",
+ seq_printf(m, "Relinqs: n=%u nul=%u wcr=%u rtr=%u\n",
atomic_read(&fscache_n_relinquishes),
atomic_read(&fscache_n_relinquishes_null),
- atomic_read(&fscache_n_relinquishes_waitcrt));
+ atomic_read(&fscache_n_relinquishes_waitcrt),
+ atomic_read(&fscache_n_relinquishes_retire));
seq_printf(m, "AttrChg: n=%u ok=%u nbf=%u oom=%u run=%u\n",
atomic_read(&fscache_n_attr_changed),
atomic_read(&fscache_n_attr_changed_nomem),
atomic_read(&fscache_n_attr_changed_calls));
- seq_printf(m, "Allocs : n=%u ok=%u wt=%u nbf=%u\n",
+ seq_printf(m, "Allocs : n=%u ok=%u wt=%u nbf=%u int=%u\n",
atomic_read(&fscache_n_allocs),
atomic_read(&fscache_n_allocs_ok),
atomic_read(&fscache_n_allocs_wait),
- atomic_read(&fscache_n_allocs_nobufs));
- seq_printf(m, "Allocs : ops=%u owt=%u\n",
+ atomic_read(&fscache_n_allocs_nobufs),
+ atomic_read(&fscache_n_allocs_intr));
+ seq_printf(m, "Allocs : ops=%u owt=%u abt=%u\n",
atomic_read(&fscache_n_alloc_ops),
- atomic_read(&fscache_n_alloc_op_waits));
+ atomic_read(&fscache_n_alloc_op_waits),
+ atomic_read(&fscache_n_allocs_object_dead));
seq_printf(m, "Retrvls: n=%u ok=%u wt=%u nod=%u nbf=%u"
" int=%u oom=%u\n",
atomic_read(&fscache_n_retrievals_nobufs),
atomic_read(&fscache_n_retrievals_intr),
atomic_read(&fscache_n_retrievals_nomem));
- seq_printf(m, "Retrvls: ops=%u owt=%u\n",
+ seq_printf(m, "Retrvls: ops=%u owt=%u abt=%u\n",
atomic_read(&fscache_n_retrieval_ops),
- atomic_read(&fscache_n_retrieval_op_waits));
+ atomic_read(&fscache_n_retrieval_op_waits),
+ atomic_read(&fscache_n_retrievals_object_dead));
seq_printf(m, "Stores : n=%u ok=%u agn=%u nbf=%u oom=%u\n",
atomic_read(&fscache_n_stores),
atomic_read(&fscache_n_stores_again),
atomic_read(&fscache_n_stores_nobufs),
atomic_read(&fscache_n_stores_oom));
- seq_printf(m, "Stores : ops=%u run=%u\n",
+ seq_printf(m, "Stores : ops=%u run=%u pgs=%u rxd=%u olm=%u\n",
atomic_read(&fscache_n_store_ops),
- atomic_read(&fscache_n_store_calls));
+ atomic_read(&fscache_n_store_calls),
+ atomic_read(&fscache_n_store_pages),
+ atomic_read(&fscache_n_store_radix_deletes),
+ atomic_read(&fscache_n_store_pages_over_limit));
- seq_printf(m, "Ops : pend=%u run=%u enq=%u\n",
+ seq_printf(m, "VmScan : nos=%u gon=%u bsy=%u can=%u\n",
+ atomic_read(&fscache_n_store_vmscan_not_storing),
+ atomic_read(&fscache_n_store_vmscan_gone),
+ atomic_read(&fscache_n_store_vmscan_busy),
+ atomic_read(&fscache_n_store_vmscan_cancelled));
+
+ seq_printf(m, "Ops : pend=%u run=%u enq=%u can=%u rej=%u\n",
atomic_read(&fscache_n_op_pend),
atomic_read(&fscache_n_op_run),
- atomic_read(&fscache_n_op_enqueue));
+ atomic_read(&fscache_n_op_enqueue),
+ atomic_read(&fscache_n_op_cancelled),
+ atomic_read(&fscache_n_op_rejected));
seq_printf(m, "Ops : dfr=%u rel=%u gc=%u\n",
atomic_read(&fscache_n_op_deferred_release),
atomic_read(&fscache_n_op_release),
atomic_read(&fscache_n_op_gc));
+
+ seq_printf(m, "CacheOp: alo=%d luo=%d luc=%d gro=%d\n",
+ atomic_read(&fscache_n_cop_alloc_object),
+ atomic_read(&fscache_n_cop_lookup_object),
+ atomic_read(&fscache_n_cop_lookup_complete),
+ atomic_read(&fscache_n_cop_grab_object));
+ seq_printf(m, "CacheOp: upo=%d dro=%d pto=%d atc=%d syn=%d\n",
+ atomic_read(&fscache_n_cop_update_object),
+ atomic_read(&fscache_n_cop_drop_object),
+ atomic_read(&fscache_n_cop_put_object),
+ atomic_read(&fscache_n_cop_attr_changed),
+ atomic_read(&fscache_n_cop_sync_cache));
+ seq_printf(m, "CacheOp: rap=%d ras=%d alp=%d als=%d wrp=%d ucp=%d dsp=%d\n",
+ atomic_read(&fscache_n_cop_read_or_alloc_page),
+ atomic_read(&fscache_n_cop_read_or_alloc_pages),
+ atomic_read(&fscache_n_cop_allocate_page),
+ atomic_read(&fscache_n_cop_allocate_pages),
+ atomic_read(&fscache_n_cop_write_page),
+ atomic_read(&fscache_n_cop_uncache_page),
+ atomic_read(&fscache_n_cop_dissociate_pages));
return 0;
}
if (error)
goto fail_unregister;
- error = slow_work_register_user();
+ error = slow_work_register_user(THIS_MODULE);
if (error)
goto fail_slow;
gfs2_unregister_debugfs();
unregister_filesystem(&gfs2_fs_type);
unregister_filesystem(&gfs2meta_fs_type);
- slow_work_unregister_user();
+ slow_work_unregister_user(THIS_MODULE);
kmem_cache_destroy(gfs2_quotad_cachep);
kmem_cache_destroy(gfs2_rgrpd_cachep);
* of the GNU General Public License version 2.
*/
+#include <linux/module.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
}
struct slow_work_ops gfs2_recover_ops = {
+ .owner = THIS_MODULE,
.get_ref = gfs2_recover_get_ref,
.put_ref = gfs2_recover_put_ref,
.execute = gfs2_recover_work,
/* XXX FIXME: Where a single physical node actually shows up in two
frags, we read it twice. Don't do that. */
- /* Now we're pointing at the first frag which overlaps our page */
+ /* Now we're pointing at the first frag which overlaps our page
+ * (or perhaps is before it, if we've been asked to read off the
+ * end of the file). */
while(offset < end) {
D2(printk(KERN_DEBUG "jffs2_read_inode_range: offset %d, end %d\n", offset, end));
- if (unlikely(!frag || frag->ofs > offset)) {
+ if (unlikely(!frag || frag->ofs > offset ||
+ frag->ofs + frag->size <= offset)) {
uint32_t holesize = end - offset;
- if (frag) {
+ if (frag && frag->ofs > offset) {
D1(printk(KERN_NOTICE "Eep. Hole in ino #%u fraglist. frag->ofs = 0x%08x, offset = 0x%08x\n", f->inocache->ino, frag->ofs, offset));
holesize = min(holesize, frag->ofs - offset);
}
BUG_ON(!cookie);
- if (fscache_check_page_write(cookie, page)) {
- if (!(gfp & __GFP_WAIT))
- return 0;
- fscache_wait_on_page_write(cookie, page);
- }
-
if (PageFsCache(page)) {
dfprintk(FSCACHE, "NFS: fscache releasepage (0x%p/0x%p/0x%p)\n",
cookie, page, nfsi);
- fscache_uncache_page(cookie, page);
+ if (!fscache_maybe_release_page(cookie, page, gfp))
+ return 0;
+
nfs_add_fscache_stats(page->mapping->host,
NFSIOS_FSCACHE_PAGES_UNCACHED, 1);
}
#define FSCACHE_OP_WAITING 4 /* cleared when op is woken */
#define FSCACHE_OP_EXCLUSIVE 5 /* exclusive op, other ops must wait */
#define FSCACHE_OP_DEAD 6 /* op is now dead */
+#define FSCACHE_OP_DEC_READ_CNT 7 /* decrement object->n_reads on destruction */
+#define FSCACHE_OP_KEEP_FLAGS 0xc0 /* flags to keep when repurposing an op */
atomic_t usage;
unsigned debug_id; /* debugging ID */
/* operation releaser */
fscache_operation_release_t release;
+
+#ifdef CONFIG_SLOW_WORK_PROC
+ const char *name; /* operation name */
+ const char *state; /* operation state */
+#define fscache_set_op_name(OP, N) do { (OP)->name = (N); } while(0)
+#define fscache_set_op_state(OP, S) do { (OP)->state = (S); } while(0)
+#else
+#define fscache_set_op_name(OP, N) do { } while(0)
+#define fscache_set_op_state(OP, S) do { } while(0)
+#endif
};
extern atomic_t fscache_op_debug_id;
op->debug_id = atomic_inc_return(&fscache_op_debug_id);
op->release = release;
INIT_LIST_HEAD(&op->pend_link);
+ fscache_set_op_state(op, "Init");
}
/**
struct fscache_object *(*alloc_object)(struct fscache_cache *cache,
struct fscache_cookie *cookie);
- /* look up the object for a cookie */
- void (*lookup_object)(struct fscache_object *object);
+ /* look up the object for a cookie
+ * - return -ETIMEDOUT to be requeued
+ */
+ int (*lookup_object)(struct fscache_object *object);
/* finished looking up */
void (*lookup_complete)(struct fscache_object *object);
atomic_t usage; /* number of users of this cookie */
atomic_t n_children; /* number of children of this cookie */
spinlock_t lock;
+ spinlock_t stores_lock; /* lock on page store tree */
struct hlist_head backing_objects; /* object(s) backing this file/index */
const struct fscache_cookie_def *def; /* definition */
struct fscache_cookie *parent; /* parent of this entry */
void *netfs_data; /* back pointer to netfs */
struct radix_tree_root stores; /* pages to be stored on this cookie */
#define FSCACHE_COOKIE_PENDING_TAG 0 /* pages tag: pending write to cache */
+#define FSCACHE_COOKIE_STORING_TAG 1 /* pages tag: writing to cache */
unsigned long flags;
#define FSCACHE_COOKIE_LOOKING_UP 0 /* T if non-index cookie being looked up still */
FSCACHE_OBJECT_RECYCLING, /* retiring object */
FSCACHE_OBJECT_WITHDRAWING, /* withdrawing object */
FSCACHE_OBJECT_DEAD, /* object is now dead */
+ FSCACHE_OBJECT__NSTATES
} state;
int debug_id; /* debugging ID */
int n_obj_ops; /* number of object ops outstanding on object */
int n_in_progress; /* number of ops in progress */
int n_exclusive; /* number of exclusive ops queued */
+ atomic_t n_reads; /* number of read ops in progress */
spinlock_t lock; /* state and operations lock */
unsigned long lookup_jif; /* time at which lookup started */
#define FSCACHE_OBJECT_EV_RELEASE 4 /* T if netfs requested object release */
#define FSCACHE_OBJECT_EV_RETIRE 5 /* T if netfs requested object retirement */
#define FSCACHE_OBJECT_EV_WITHDRAW 6 /* T if cache requested object withdrawal */
+#define FSCACHE_OBJECT_EVENTS_MASK 0x7f /* mask of all events*/
unsigned long flags;
#define FSCACHE_OBJECT_LOCK 0 /* T if object is busy being processed */
struct list_head dependents; /* FIFO of dependent objects */
struct list_head dep_link; /* link in parent's dependents list */
struct list_head pending_ops; /* unstarted operations on this object */
+#ifdef CONFIG_FSCACHE_OBJECT_LIST
+ struct rb_node objlist_link; /* link in global object list */
+#endif
pgoff_t store_limit; /* current storage limit */
+ loff_t store_limit_l; /* current storage limit */
};
extern const char *fscache_object_states[];
(obj)->state >= FSCACHE_OBJECT_AVAILABLE && \
(obj)->state < FSCACHE_OBJECT_DYING)
+#define fscache_object_is_dead(obj) \
+ (test_bit(FSCACHE_IOERROR, &(obj)->cache->flags) && \
+ (obj)->state >= FSCACHE_OBJECT_DYING)
+
extern const struct slow_work_ops fscache_object_slow_work_ops;
/**
object->events = object->event_mask = 0;
object->flags = 0;
object->store_limit = 0;
+ object->store_limit_l = 0;
object->cache = cache;
object->cookie = cookie;
object->parent = NULL;
extern void fscache_object_lookup_negative(struct fscache_object *object);
extern void fscache_obtained_object(struct fscache_object *object);
+#ifdef CONFIG_FSCACHE_OBJECT_LIST
+extern void fscache_object_destroy(struct fscache_object *object);
+#else
+#define fscache_object_destroy(object) do {} while(0)
+#endif
+
/**
* fscache_object_destroyed - Note destruction of an object in a cache
* @cache: The cache from which the object came
static inline
void fscache_set_store_limit(struct fscache_object *object, loff_t i_size)
{
+ object->store_limit_l = i_size;
object->store_limit = i_size >> PAGE_SHIFT;
if (i_size & ~PAGE_MASK)
object->store_limit++;
extern void __fscache_uncache_page(struct fscache_cookie *, struct page *);
extern bool __fscache_check_page_write(struct fscache_cookie *, struct page *);
extern void __fscache_wait_on_page_write(struct fscache_cookie *, struct page *);
+extern bool __fscache_maybe_release_page(struct fscache_cookie *, struct page *,
+ gfp_t);
/**
* fscache_register_netfs - Register a filesystem as desiring caching services
__fscache_wait_on_page_write(cookie, page);
}
+/**
+ * fscache_maybe_release_page - Consider releasing a page, cancelling a store
+ * @cookie: The cookie representing the cache object
+ * @page: The netfs page that is being cached.
+ * @gfp: The gfp flags passed to releasepage()
+ *
+ * Consider releasing a page for the vmscan algorithm, on behalf of the netfs's
+ * releasepage() call. A storage request on the page may cancelled if it is
+ * not currently being processed.
+ *
+ * The function returns true if the page no longer has a storage request on it,
+ * and false if a storage request is left in place. If true is returned, the
+ * page will have been passed to fscache_uncache_page(). If false is returned
+ * the page cannot be freed yet.
+ */
+static inline
+bool fscache_maybe_release_page(struct fscache_cookie *cookie,
+ struct page *page,
+ gfp_t gfp)
+{
+ if (fscache_cookie_valid(cookie) && PageFsCache(page))
+ return __fscache_maybe_release_page(cookie, page, gfp);
+ return false;
+}
+
#endif /* _LINUX_FSCACHE_H */
#ifdef CONFIG_SLOW_WORK
#include <linux/sysctl.h>
+#include <linux/timer.h>
struct slow_work;
+#ifdef CONFIG_SLOW_WORK_PROC
+struct seq_file;
+#endif
/*
* The operations used to support slow work items
*/
struct slow_work_ops {
+ /* owner */
+ struct module *owner;
+
/* get a ref on a work item
* - return 0 if successful, -ve if not
*/
/* execute a work item */
void (*execute)(struct slow_work *work);
+
+#ifdef CONFIG_SLOW_WORK_PROC
+ /* describe a work item for /proc */
+ void (*desc)(struct slow_work *work, struct seq_file *m);
+#endif
};
/*
* queued
*/
struct slow_work {
+ struct module *owner; /* the owning module */
unsigned long flags;
#define SLOW_WORK_PENDING 0 /* item pending (further) execution */
#define SLOW_WORK_EXECUTING 1 /* item currently executing */
#define SLOW_WORK_ENQ_DEFERRED 2 /* item enqueue deferred */
#define SLOW_WORK_VERY_SLOW 3 /* item is very slow */
+#define SLOW_WORK_CANCELLING 4 /* item is being cancelled, don't enqueue */
+#define SLOW_WORK_DELAYED 5 /* item is struct delayed_slow_work with active timer */
const struct slow_work_ops *ops; /* operations table for this item */
struct list_head link; /* link in queue */
+#ifdef CONFIG_SLOW_WORK_PROC
+ struct timespec mark; /* jiffies at which queued or exec begun */
+#endif
+};
+
+struct delayed_slow_work {
+ struct slow_work work;
+ struct timer_list timer;
};
/**
INIT_LIST_HEAD(&work->link);
}
+/**
+ * slow_work_init - Initialise a delayed slow work item
+ * @work: The work item to initialise
+ * @ops: The operations to use to handle the slow work item
+ *
+ * Initialise a delayed slow work item.
+ */
+static inline void delayed_slow_work_init(struct delayed_slow_work *dwork,
+ const struct slow_work_ops *ops)
+{
+ init_timer(&dwork->timer);
+ slow_work_init(&dwork->work, ops);
+}
+
/**
* vslow_work_init - Initialise a very slow work item
* @work: The work item to initialise
INIT_LIST_HEAD(&work->link);
}
+/**
+ * slow_work_is_queued - Determine if a slow work item is on the work queue
+ * work: The work item to test
+ *
+ * Determine if the specified slow-work item is on the work queue. This
+ * returns true if it is actually on the queue.
+ *
+ * If the item is executing and has been marked for requeue when execution
+ * finishes, then false will be returned.
+ *
+ * Anyone wishing to wait for completion of execution can wait on the
+ * SLOW_WORK_EXECUTING bit.
+ */
+static inline bool slow_work_is_queued(struct slow_work *work)
+{
+ unsigned long flags = work->flags;
+ return flags & SLOW_WORK_PENDING && !(flags & SLOW_WORK_EXECUTING);
+}
+
extern int slow_work_enqueue(struct slow_work *work);
-extern int slow_work_register_user(void);
-extern void slow_work_unregister_user(void);
+extern void slow_work_cancel(struct slow_work *work);
+extern int slow_work_register_user(struct module *owner);
+extern void slow_work_unregister_user(struct module *owner);
+
+extern int delayed_slow_work_enqueue(struct delayed_slow_work *dwork,
+ unsigned long delay);
+
+static inline void delayed_slow_work_cancel(struct delayed_slow_work *dwork)
+{
+ slow_work_cancel(&dwork->work);
+}
+
+extern bool slow_work_sleep_till_thread_needed(struct slow_work *work,
+ signed long *_timeout);
#ifdef CONFIG_SYSCTL
extern ctl_table slow_work_sysctls[];
See Documentation/slow-work.txt.
+config SLOW_WORK_PROC
+ bool "Slow work debugging through /proc"
+ default n
+ depends on SLOW_WORK && PROC_FS
+ help
+ Display the contents of the slow work run queue through /proc,
+ including items currently executing.
+
+ See Documentation/slow-work.txt.
+
endmenu # General setup
config HAVE_GENERIC_DMA_COHERENT
obj-$(CONFIG_RING_BUFFER) += trace/
obj-$(CONFIG_SMP) += sched_cpupri.o
obj-$(CONFIG_SLOW_WORK) += slow-work.o
+obj-$(CONFIG_SLOW_WORK_PROC) += slow-work-proc.o
obj-$(CONFIG_PERF_EVENTS) += perf_event.o
ifneq ($(CONFIG_SCHED_OMIT_FRAME_POINTER),y)
--- /dev/null
+/* Slow work debugging
+ *
+ * Copyright (C) 2009 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/slow-work.h>
+#include <linux/fs.h>
+#include <linux/time.h>
+#include <linux/seq_file.h>
+#include "slow-work.h"
+
+#define ITERATOR_SHIFT (BITS_PER_LONG - 4)
+#define ITERATOR_SELECTOR (0xfUL << ITERATOR_SHIFT)
+#define ITERATOR_COUNTER (~ITERATOR_SELECTOR)
+
+void slow_work_new_thread_desc(struct slow_work *work, struct seq_file *m)
+{
+ seq_puts(m, "Slow-work: New thread");
+}
+
+/*
+ * Render the time mark field on a work item into a 5-char time with units plus
+ * a space
+ */
+static void slow_work_print_mark(struct seq_file *m, struct slow_work *work)
+{
+ struct timespec now, diff;
+
+ now = CURRENT_TIME;
+ diff = timespec_sub(now, work->mark);
+
+ if (diff.tv_sec < 0)
+ seq_puts(m, " -ve ");
+ else if (diff.tv_sec == 0 && diff.tv_nsec < 1000)
+ seq_printf(m, "%3luns ", diff.tv_nsec);
+ else if (diff.tv_sec == 0 && diff.tv_nsec < 1000000)
+ seq_printf(m, "%3luus ", diff.tv_nsec / 1000);
+ else if (diff.tv_sec == 0 && diff.tv_nsec < 1000000000)
+ seq_printf(m, "%3lums ", diff.tv_nsec / 1000000);
+ else if (diff.tv_sec <= 1)
+ seq_puts(m, " 1s ");
+ else if (diff.tv_sec < 60)
+ seq_printf(m, "%4lus ", diff.tv_sec);
+ else if (diff.tv_sec < 60 * 60)
+ seq_printf(m, "%4lum ", diff.tv_sec / 60);
+ else if (diff.tv_sec < 60 * 60 * 24)
+ seq_printf(m, "%4luh ", diff.tv_sec / 3600);
+ else
+ seq_puts(m, "exces ");
+}
+
+/*
+ * Describe a slow work item for /proc
+ */
+static int slow_work_runqueue_show(struct seq_file *m, void *v)
+{
+ struct slow_work *work;
+ struct list_head *p = v;
+ unsigned long id;
+
+ switch ((unsigned long) v) {
+ case 1:
+ seq_puts(m, "THR PID ITEM ADDR FL MARK DESC\n");
+ return 0;
+ case 2:
+ seq_puts(m, "=== ===== ================ == ===== ==========\n");
+ return 0;
+
+ case 3 ... 3 + SLOW_WORK_THREAD_LIMIT - 1:
+ id = (unsigned long) v - 3;
+
+ read_lock(&slow_work_execs_lock);
+ work = slow_work_execs[id];
+ if (work) {
+ smp_read_barrier_depends();
+
+ seq_printf(m, "%3lu %5d %16p %2lx ",
+ id, slow_work_pids[id], work, work->flags);
+ slow_work_print_mark(m, work);
+
+ if (work->ops->desc)
+ work->ops->desc(work, m);
+ seq_putc(m, '\n');
+ }
+ read_unlock(&slow_work_execs_lock);
+ return 0;
+
+ default:
+ work = list_entry(p, struct slow_work, link);
+ seq_printf(m, "%3s - %16p %2lx ",
+ work->flags & SLOW_WORK_VERY_SLOW ? "vsq" : "sq",
+ work, work->flags);
+ slow_work_print_mark(m, work);
+
+ if (work->ops->desc)
+ work->ops->desc(work, m);
+ seq_putc(m, '\n');
+ return 0;
+ }
+}
+
+/*
+ * map the iterator to a work item
+ */
+static void *slow_work_runqueue_index(struct seq_file *m, loff_t *_pos)
+{
+ struct list_head *p;
+ unsigned long count, id;
+
+ switch (*_pos >> ITERATOR_SHIFT) {
+ case 0x0:
+ if (*_pos == 0)
+ *_pos = 1;
+ if (*_pos < 3)
+ return (void *)(unsigned long) *_pos;
+ if (*_pos < 3 + SLOW_WORK_THREAD_LIMIT)
+ for (id = *_pos - 3;
+ id < SLOW_WORK_THREAD_LIMIT;
+ id++, (*_pos)++)
+ if (slow_work_execs[id])
+ return (void *)(unsigned long) *_pos;
+ *_pos = 0x1UL << ITERATOR_SHIFT;
+
+ case 0x1:
+ count = *_pos & ITERATOR_COUNTER;
+ list_for_each(p, &slow_work_queue) {
+ if (count == 0)
+ return p;
+ count--;
+ }
+ *_pos = 0x2UL << ITERATOR_SHIFT;
+
+ case 0x2:
+ count = *_pos & ITERATOR_COUNTER;
+ list_for_each(p, &vslow_work_queue) {
+ if (count == 0)
+ return p;
+ count--;
+ }
+ *_pos = 0x3UL << ITERATOR_SHIFT;
+
+ default:
+ return NULL;
+ }
+}
+
+/*
+ * set up the iterator to start reading from the first line
+ */
+static void *slow_work_runqueue_start(struct seq_file *m, loff_t *_pos)
+{
+ spin_lock_irq(&slow_work_queue_lock);
+ return slow_work_runqueue_index(m, _pos);
+}
+
+/*
+ * move to the next line
+ */
+static void *slow_work_runqueue_next(struct seq_file *m, void *v, loff_t *_pos)
+{
+ struct list_head *p = v;
+ unsigned long selector = *_pos >> ITERATOR_SHIFT;
+
+ (*_pos)++;
+ switch (selector) {
+ case 0x0:
+ return slow_work_runqueue_index(m, _pos);
+
+ case 0x1:
+ if (*_pos >> ITERATOR_SHIFT == 0x1) {
+ p = p->next;
+ if (p != &slow_work_queue)
+ return p;
+ }
+ *_pos = 0x2UL << ITERATOR_SHIFT;
+ p = &vslow_work_queue;
+
+ case 0x2:
+ if (*_pos >> ITERATOR_SHIFT == 0x2) {
+ p = p->next;
+ if (p != &vslow_work_queue)
+ return p;
+ }
+ *_pos = 0x3UL << ITERATOR_SHIFT;
+
+ default:
+ return NULL;
+ }
+}
+
+/*
+ * clean up after reading
+ */
+static void slow_work_runqueue_stop(struct seq_file *m, void *v)
+{
+ spin_unlock_irq(&slow_work_queue_lock);
+}
+
+static const struct seq_operations slow_work_runqueue_ops = {
+ .start = slow_work_runqueue_start,
+ .stop = slow_work_runqueue_stop,
+ .next = slow_work_runqueue_next,
+ .show = slow_work_runqueue_show,
+};
+
+/*
+ * open "/proc/slow_work_rq" to list queue contents
+ */
+static int slow_work_runqueue_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &slow_work_runqueue_ops);
+}
+
+const struct file_operations slow_work_runqueue_fops = {
+ .owner = THIS_MODULE,
+ .open = slow_work_runqueue_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/wait.h>
-
-#define SLOW_WORK_CULL_TIMEOUT (5 * HZ) /* cull threads 5s after running out of
- * things to do */
-#define SLOW_WORK_OOM_TIMEOUT (5 * HZ) /* can't start new threads for 5s after
- * OOM */
+#include <linux/proc_fs.h>
+#include "slow-work.h"
static void slow_work_cull_timeout(unsigned long);
static void slow_work_oom_timeout(unsigned long);
#ifdef CONFIG_SYSCTL
static const int slow_work_min_min_threads = 2;
-static int slow_work_max_max_threads = 255;
+static int slow_work_max_max_threads = SLOW_WORK_THREAD_LIMIT;
static const int slow_work_min_vslow = 1;
static const int slow_work_max_vslow = 99;
static DEFINE_TIMER(slow_work_oom_timer, slow_work_oom_timeout, 0, 0);
static struct slow_work slow_work_new_thread; /* new thread starter */
+/*
+ * slow work ID allocation (use slow_work_queue_lock)
+ */
+static DECLARE_BITMAP(slow_work_ids, SLOW_WORK_THREAD_LIMIT);
+
+/*
+ * Unregistration tracking to prevent put_ref() from disappearing during module
+ * unload
+ */
+#ifdef CONFIG_MODULES
+static struct module *slow_work_thread_processing[SLOW_WORK_THREAD_LIMIT];
+static struct module *slow_work_unreg_module;
+static struct slow_work *slow_work_unreg_work_item;
+static DECLARE_WAIT_QUEUE_HEAD(slow_work_unreg_wq);
+static DEFINE_MUTEX(slow_work_unreg_sync_lock);
+#endif
+
+/*
+ * Data for tracking currently executing items for indication through /proc
+ */
+#ifdef CONFIG_SLOW_WORK_PROC
+struct slow_work *slow_work_execs[SLOW_WORK_THREAD_LIMIT];
+pid_t slow_work_pids[SLOW_WORK_THREAD_LIMIT];
+DEFINE_RWLOCK(slow_work_execs_lock);
+#endif
+
/*
* The queues of work items and the lock governing access to them. These are
* shared between all the CPUs. It doesn't make sense to have per-CPU queues
* There are two queues of work items: one for slow work items, and one for
* very slow work items.
*/
-static LIST_HEAD(slow_work_queue);
-static LIST_HEAD(vslow_work_queue);
-static DEFINE_SPINLOCK(slow_work_queue_lock);
+LIST_HEAD(slow_work_queue);
+LIST_HEAD(vslow_work_queue);
+DEFINE_SPINLOCK(slow_work_queue_lock);
+
+/*
+ * The following are two wait queues that get pinged when a work item is placed
+ * on an empty queue. These allow work items that are hogging a thread by
+ * sleeping in a way that could be deferred to yield their thread and enqueue
+ * themselves.
+ */
+static DECLARE_WAIT_QUEUE_HEAD(slow_work_queue_waits_for_occupation);
+static DECLARE_WAIT_QUEUE_HEAD(vslow_work_queue_waits_for_occupation);
/*
* The thread controls. A variable used to signal to the threads that they
static int slow_work_user_count;
static DEFINE_MUTEX(slow_work_user_lock);
+static inline int slow_work_get_ref(struct slow_work *work)
+{
+ if (work->ops->get_ref)
+ return work->ops->get_ref(work);
+
+ return 0;
+}
+
+static inline void slow_work_put_ref(struct slow_work *work)
+{
+ if (work->ops->put_ref)
+ work->ops->put_ref(work);
+}
+
/*
* Calculate the maximum number of active threads in the pool that are
* permitted to process very slow work items.
* Attempt to execute stuff queued on a slow thread. Return true if we managed
* it, false if there was nothing to do.
*/
-static bool slow_work_execute(void)
+static noinline bool slow_work_execute(int id)
{
+#ifdef CONFIG_MODULES
+ struct module *module;
+#endif
struct slow_work *work = NULL;
unsigned vsmax;
bool very_slow;
} else {
very_slow = false; /* avoid the compiler warning */
}
+
+#ifdef CONFIG_MODULES
+ if (work)
+ slow_work_thread_processing[id] = work->owner;
+#endif
+ if (work) {
+ slow_work_mark_time(work);
+ slow_work_begin_exec(id, work);
+ }
+
spin_unlock_irq(&slow_work_queue_lock);
if (!work)
if (!test_and_clear_bit(SLOW_WORK_PENDING, &work->flags))
BUG();
- work->ops->execute(work);
+ /* don't execute if the work is in the process of being cancelled */
+ if (!test_bit(SLOW_WORK_CANCELLING, &work->flags))
+ work->ops->execute(work);
if (very_slow)
atomic_dec(&vslow_work_executing_count);
clear_bit_unlock(SLOW_WORK_EXECUTING, &work->flags);
+ /* wake up anyone waiting for this work to be complete */
+ wake_up_bit(&work->flags, SLOW_WORK_EXECUTING);
+
+ slow_work_end_exec(id, work);
+
/* if someone tried to enqueue the item whilst we were executing it,
* then it'll be left unenqueued to avoid multiple threads trying to
* execute it simultaneously
spin_unlock_irq(&slow_work_queue_lock);
}
- work->ops->put_ref(work);
+ /* sort out the race between module unloading and put_ref() */
+ slow_work_put_ref(work);
+
+#ifdef CONFIG_MODULES
+ module = slow_work_thread_processing[id];
+ slow_work_thread_processing[id] = NULL;
+ smp_mb();
+ if (slow_work_unreg_work_item == work ||
+ slow_work_unreg_module == module)
+ wake_up_all(&slow_work_unreg_wq);
+#endif
+
return true;
auto_requeue:
* - we transfer our ref on the item back to the appropriate queue
* - don't wake another thread up as we're awake already
*/
+ slow_work_mark_time(work);
if (test_bit(SLOW_WORK_VERY_SLOW, &work->flags))
list_add_tail(&work->link, &vslow_work_queue);
else
list_add_tail(&work->link, &slow_work_queue);
spin_unlock_irq(&slow_work_queue_lock);
+ slow_work_thread_processing[id] = NULL;
return true;
}
+/**
+ * slow_work_sleep_till_thread_needed - Sleep till thread needed by other work
+ * work: The work item under execution that wants to sleep
+ * _timeout: Scheduler sleep timeout
+ *
+ * Allow a requeueable work item to sleep on a slow-work processor thread until
+ * that thread is needed to do some other work or the sleep is interrupted by
+ * some other event.
+ *
+ * The caller must set up a wake up event before calling this and must have set
+ * the appropriate sleep mode (such as TASK_UNINTERRUPTIBLE) and tested its own
+ * condition before calling this function as no test is made here.
+ *
+ * False is returned if there is nothing on the queue; true is returned if the
+ * work item should be requeued
+ */
+bool slow_work_sleep_till_thread_needed(struct slow_work *work,
+ signed long *_timeout)
+{
+ wait_queue_head_t *wfo_wq;
+ struct list_head *queue;
+
+ DEFINE_WAIT(wait);
+
+ if (test_bit(SLOW_WORK_VERY_SLOW, &work->flags)) {
+ wfo_wq = &vslow_work_queue_waits_for_occupation;
+ queue = &vslow_work_queue;
+ } else {
+ wfo_wq = &slow_work_queue_waits_for_occupation;
+ queue = &slow_work_queue;
+ }
+
+ if (!list_empty(queue))
+ return true;
+
+ add_wait_queue_exclusive(wfo_wq, &wait);
+ if (list_empty(queue))
+ *_timeout = schedule_timeout(*_timeout);
+ finish_wait(wfo_wq, &wait);
+
+ return !list_empty(queue);
+}
+EXPORT_SYMBOL(slow_work_sleep_till_thread_needed);
+
/**
* slow_work_enqueue - Schedule a slow work item for processing
* @work: The work item to queue
* allowed to pick items to execute. This ensures that very slow items won't
* overly block ones that are just ordinarily slow.
*
- * Returns 0 if successful, -EAGAIN if not.
+ * Returns 0 if successful, -EAGAIN if not (or -ECANCELED if cancelled work is
+ * attempted queued)
*/
int slow_work_enqueue(struct slow_work *work)
{
+ wait_queue_head_t *wfo_wq;
+ struct list_head *queue;
unsigned long flags;
+ int ret;
+
+ if (test_bit(SLOW_WORK_CANCELLING, &work->flags))
+ return -ECANCELED;
BUG_ON(slow_work_user_count <= 0);
BUG_ON(!work);
BUG_ON(!work->ops);
- BUG_ON(!work->ops->get_ref);
/* when honouring an enqueue request, we only promise that we will run
* the work function in the future; we do not promise to run it once
* maintaining our promise
*/
if (!test_and_set_bit_lock(SLOW_WORK_PENDING, &work->flags)) {
+ if (test_bit(SLOW_WORK_VERY_SLOW, &work->flags)) {
+ wfo_wq = &vslow_work_queue_waits_for_occupation;
+ queue = &vslow_work_queue;
+ } else {
+ wfo_wq = &slow_work_queue_waits_for_occupation;
+ queue = &slow_work_queue;
+ }
+
spin_lock_irqsave(&slow_work_queue_lock, flags);
+ if (unlikely(test_bit(SLOW_WORK_CANCELLING, &work->flags)))
+ goto cancelled;
+
/* we promise that we will not attempt to execute the work
* function in more than one thread simultaneously
*
if (test_bit(SLOW_WORK_EXECUTING, &work->flags)) {
set_bit(SLOW_WORK_ENQ_DEFERRED, &work->flags);
} else {
- if (work->ops->get_ref(work) < 0)
- goto cant_get_ref;
- if (test_bit(SLOW_WORK_VERY_SLOW, &work->flags))
- list_add_tail(&work->link, &vslow_work_queue);
- else
- list_add_tail(&work->link, &slow_work_queue);
+ ret = slow_work_get_ref(work);
+ if (ret < 0)
+ goto failed;
+ slow_work_mark_time(work);
+ list_add_tail(&work->link, queue);
wake_up(&slow_work_thread_wq);
+
+ /* if someone who could be requeued is sleeping on a
+ * thread, then ask them to yield their thread */
+ if (work->link.prev == queue)
+ wake_up(wfo_wq);
}
spin_unlock_irqrestore(&slow_work_queue_lock, flags);
}
return 0;
-cant_get_ref:
+cancelled:
+ ret = -ECANCELED;
+failed:
spin_unlock_irqrestore(&slow_work_queue_lock, flags);
- return -EAGAIN;
+ return ret;
}
EXPORT_SYMBOL(slow_work_enqueue);
+static int slow_work_wait(void *word)
+{
+ schedule();
+ return 0;
+}
+
+/**
+ * slow_work_cancel - Cancel a slow work item
+ * @work: The work item to cancel
+ *
+ * This function will cancel a previously enqueued work item. If we cannot
+ * cancel the work item, it is guarenteed to have run when this function
+ * returns.
+ */
+void slow_work_cancel(struct slow_work *work)
+{
+ bool wait = true, put = false;
+
+ set_bit(SLOW_WORK_CANCELLING, &work->flags);
+ smp_mb();
+
+ /* if the work item is a delayed work item with an active timer, we
+ * need to wait for the timer to finish _before_ getting the spinlock,
+ * lest we deadlock against the timer routine
+ *
+ * the timer routine will leave DELAYED set if it notices the
+ * CANCELLING flag in time
+ */
+ if (test_bit(SLOW_WORK_DELAYED, &work->flags)) {
+ struct delayed_slow_work *dwork =
+ container_of(work, struct delayed_slow_work, work);
+ del_timer_sync(&dwork->timer);
+ }
+
+ spin_lock_irq(&slow_work_queue_lock);
+
+ if (test_bit(SLOW_WORK_DELAYED, &work->flags)) {
+ /* the timer routine aborted or never happened, so we are left
+ * holding the timer's reference on the item and should just
+ * drop the pending flag and wait for any ongoing execution to
+ * finish */
+ struct delayed_slow_work *dwork =
+ container_of(work, struct delayed_slow_work, work);
+
+ BUG_ON(timer_pending(&dwork->timer));
+ BUG_ON(!list_empty(&work->link));
+
+ clear_bit(SLOW_WORK_DELAYED, &work->flags);
+ put = true;
+ clear_bit(SLOW_WORK_PENDING, &work->flags);
+
+ } else if (test_bit(SLOW_WORK_PENDING, &work->flags) &&
+ !list_empty(&work->link)) {
+ /* the link in the pending queue holds a reference on the item
+ * that we will need to release */
+ list_del_init(&work->link);
+ wait = false;
+ put = true;
+ clear_bit(SLOW_WORK_PENDING, &work->flags);
+
+ } else if (test_and_clear_bit(SLOW_WORK_ENQ_DEFERRED, &work->flags)) {
+ /* the executor is holding our only reference on the item, so
+ * we merely need to wait for it to finish executing */
+ clear_bit(SLOW_WORK_PENDING, &work->flags);
+ }
+
+ spin_unlock_irq(&slow_work_queue_lock);
+
+ /* the EXECUTING flag is set by the executor whilst the spinlock is set
+ * and before the item is dequeued - so assuming the above doesn't
+ * actually dequeue it, simply waiting for the EXECUTING flag to be
+ * released here should be sufficient */
+ if (wait)
+ wait_on_bit(&work->flags, SLOW_WORK_EXECUTING, slow_work_wait,
+ TASK_UNINTERRUPTIBLE);
+
+ clear_bit(SLOW_WORK_CANCELLING, &work->flags);
+ if (put)
+ slow_work_put_ref(work);
+}
+EXPORT_SYMBOL(slow_work_cancel);
+
+/*
+ * Handle expiry of the delay timer, indicating that a delayed slow work item
+ * should now be queued if not cancelled
+ */
+static void delayed_slow_work_timer(unsigned long data)
+{
+ wait_queue_head_t *wfo_wq;
+ struct list_head *queue;
+ struct slow_work *work = (struct slow_work *) data;
+ unsigned long flags;
+ bool queued = false, put = false, first = false;
+
+ if (test_bit(SLOW_WORK_VERY_SLOW, &work->flags)) {
+ wfo_wq = &vslow_work_queue_waits_for_occupation;
+ queue = &vslow_work_queue;
+ } else {
+ wfo_wq = &slow_work_queue_waits_for_occupation;
+ queue = &slow_work_queue;
+ }
+
+ spin_lock_irqsave(&slow_work_queue_lock, flags);
+ if (likely(!test_bit(SLOW_WORK_CANCELLING, &work->flags))) {
+ clear_bit(SLOW_WORK_DELAYED, &work->flags);
+
+ if (test_bit(SLOW_WORK_EXECUTING, &work->flags)) {
+ /* we discard the reference the timer was holding in
+ * favour of the one the executor holds */
+ set_bit(SLOW_WORK_ENQ_DEFERRED, &work->flags);
+ put = true;
+ } else {
+ slow_work_mark_time(work);
+ list_add_tail(&work->link, queue);
+ queued = true;
+ if (work->link.prev == queue)
+ first = true;
+ }
+ }
+
+ spin_unlock_irqrestore(&slow_work_queue_lock, flags);
+ if (put)
+ slow_work_put_ref(work);
+ if (first)
+ wake_up(wfo_wq);
+ if (queued)
+ wake_up(&slow_work_thread_wq);
+}
+
+/**
+ * delayed_slow_work_enqueue - Schedule a delayed slow work item for processing
+ * @dwork: The delayed work item to queue
+ * @delay: When to start executing the work, in jiffies from now
+ *
+ * This is similar to slow_work_enqueue(), but it adds a delay before the work
+ * is actually queued for processing.
+ *
+ * The item can have delayed processing requested on it whilst it is being
+ * executed. The delay will begin immediately, and if it expires before the
+ * item finishes executing, the item will be placed back on the queue when it
+ * has done executing.
+ */
+int delayed_slow_work_enqueue(struct delayed_slow_work *dwork,
+ unsigned long delay)
+{
+ struct slow_work *work = &dwork->work;
+ unsigned long flags;
+ int ret;
+
+ if (delay == 0)
+ return slow_work_enqueue(&dwork->work);
+
+ BUG_ON(slow_work_user_count <= 0);
+ BUG_ON(!work);
+ BUG_ON(!work->ops);
+
+ if (test_bit(SLOW_WORK_CANCELLING, &work->flags))
+ return -ECANCELED;
+
+ if (!test_and_set_bit_lock(SLOW_WORK_PENDING, &work->flags)) {
+ spin_lock_irqsave(&slow_work_queue_lock, flags);
+
+ if (test_bit(SLOW_WORK_CANCELLING, &work->flags))
+ goto cancelled;
+
+ /* the timer holds a reference whilst it is pending */
+ ret = work->ops->get_ref(work);
+ if (ret < 0)
+ goto cant_get_ref;
+
+ if (test_and_set_bit(SLOW_WORK_DELAYED, &work->flags))
+ BUG();
+ dwork->timer.expires = jiffies + delay;
+ dwork->timer.data = (unsigned long) work;
+ dwork->timer.function = delayed_slow_work_timer;
+ add_timer(&dwork->timer);
+
+ spin_unlock_irqrestore(&slow_work_queue_lock, flags);
+ }
+
+ return 0;
+
+cancelled:
+ ret = -ECANCELED;
+cant_get_ref:
+ spin_unlock_irqrestore(&slow_work_queue_lock, flags);
+ return ret;
+}
+EXPORT_SYMBOL(delayed_slow_work_enqueue);
+
/*
* Schedule a cull of the thread pool at some time in the near future
*/
*/
static int slow_work_thread(void *_data)
{
- int vsmax;
+ int vsmax, id;
DEFINE_WAIT(wait);
set_freezable();
set_user_nice(current, -5);
+ /* allocate ourselves an ID */
+ spin_lock_irq(&slow_work_queue_lock);
+ id = find_first_zero_bit(slow_work_ids, SLOW_WORK_THREAD_LIMIT);
+ BUG_ON(id < 0 || id >= SLOW_WORK_THREAD_LIMIT);
+ __set_bit(id, slow_work_ids);
+ slow_work_set_thread_pid(id, current->pid);
+ spin_unlock_irq(&slow_work_queue_lock);
+
+ sprintf(current->comm, "kslowd%03u", id);
+
for (;;) {
vsmax = vslow_work_proportion;
vsmax *= atomic_read(&slow_work_thread_count);
vsmax *= atomic_read(&slow_work_thread_count);
vsmax /= 100;
- if (slow_work_available(vsmax) && slow_work_execute()) {
+ if (slow_work_available(vsmax) && slow_work_execute(id)) {
cond_resched();
if (list_empty(&slow_work_queue) &&
list_empty(&vslow_work_queue) &&
break;
}
+ spin_lock_irq(&slow_work_queue_lock);
+ slow_work_set_thread_pid(id, 0);
+ __clear_bit(id, slow_work_ids);
+ spin_unlock_irq(&slow_work_queue_lock);
+
if (atomic_dec_and_test(&slow_work_thread_count))
complete_and_exit(&slow_work_last_thread_exited, 0);
return 0;
wake_up(&slow_work_thread_wq);
}
-/*
- * Get a reference on slow work thread starter
- */
-static int slow_work_new_thread_get_ref(struct slow_work *work)
-{
- return 0;
-}
-
-/*
- * Drop a reference on slow work thread starter
- */
-static void slow_work_new_thread_put_ref(struct slow_work *work)
-{
-}
-
/*
* Start a new slow work thread
*/
}
static const struct slow_work_ops slow_work_new_thread_ops = {
- .get_ref = slow_work_new_thread_get_ref,
- .put_ref = slow_work_new_thread_put_ref,
+ .owner = THIS_MODULE,
.execute = slow_work_new_thread_execute,
+#ifdef CONFIG_SLOW_WORK_PROC
+ .desc = slow_work_new_thread_desc,
+#endif
};
/*
/**
* slow_work_register_user - Register a user of the facility
+ * @module: The module about to make use of the facility
*
* Register a user of the facility, starting up the initial threads if there
* aren't any other users at this point. This will return 0 if successful, or
* an error if not.
*/
-int slow_work_register_user(void)
+int slow_work_register_user(struct module *module)
{
struct task_struct *p;
int loop;
}
EXPORT_SYMBOL(slow_work_register_user);
+/*
+ * wait for all outstanding items from the calling module to complete
+ * - note that more items may be queued whilst we're waiting
+ */
+static void slow_work_wait_for_items(struct module *module)
+{
+ DECLARE_WAITQUEUE(myself, current);
+ struct slow_work *work;
+ int loop;
+
+ mutex_lock(&slow_work_unreg_sync_lock);
+ add_wait_queue(&slow_work_unreg_wq, &myself);
+
+ for (;;) {
+ spin_lock_irq(&slow_work_queue_lock);
+
+ /* first of all, we wait for the last queued item in each list
+ * to be processed */
+ list_for_each_entry_reverse(work, &vslow_work_queue, link) {
+ if (work->owner == module) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ slow_work_unreg_work_item = work;
+ goto do_wait;
+ }
+ }
+ list_for_each_entry_reverse(work, &slow_work_queue, link) {
+ if (work->owner == module) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ slow_work_unreg_work_item = work;
+ goto do_wait;
+ }
+ }
+
+ /* then we wait for the items being processed to finish */
+ slow_work_unreg_module = module;
+ smp_mb();
+ for (loop = 0; loop < SLOW_WORK_THREAD_LIMIT; loop++) {
+ if (slow_work_thread_processing[loop] == module)
+ goto do_wait;
+ }
+ spin_unlock_irq(&slow_work_queue_lock);
+ break; /* okay, we're done */
+
+ do_wait:
+ spin_unlock_irq(&slow_work_queue_lock);
+ schedule();
+ slow_work_unreg_work_item = NULL;
+ slow_work_unreg_module = NULL;
+ }
+
+ remove_wait_queue(&slow_work_unreg_wq, &myself);
+ mutex_unlock(&slow_work_unreg_sync_lock);
+}
+
/**
* slow_work_unregister_user - Unregister a user of the facility
+ * @module: The module whose items should be cleared
*
* Unregister a user of the facility, killing all the threads if this was the
* last one.
+ *
+ * This waits for all the work items belonging to the nominated module to go
+ * away before proceeding.
*/
-void slow_work_unregister_user(void)
+void slow_work_unregister_user(struct module *module)
{
+ /* first of all, wait for all outstanding items from the calling module
+ * to complete */
+ if (module)
+ slow_work_wait_for_items(module);
+
+ /* then we can actually go about shutting down the facility if need
+ * be */
mutex_lock(&slow_work_user_lock);
BUG_ON(slow_work_user_count <= 0);
#ifdef CONFIG_SYSCTL
if (slow_work_max_max_threads < nr_cpus * 2)
slow_work_max_max_threads = nr_cpus * 2;
+#endif
+#ifdef CONFIG_SLOW_WORK_PROC
+ proc_create("slow_work_rq", S_IFREG | 0400, NULL,
+ &slow_work_runqueue_fops);
#endif
return 0;
}
--- /dev/null
+/* Slow work private definitions
+ *
+ * Copyright (C) 2009 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#define SLOW_WORK_CULL_TIMEOUT (5 * HZ) /* cull threads 5s after running out of
+ * things to do */
+#define SLOW_WORK_OOM_TIMEOUT (5 * HZ) /* can't start new threads for 5s after
+ * OOM */
+
+#define SLOW_WORK_THREAD_LIMIT 255 /* abs maximum number of slow-work threads */
+
+/*
+ * slow-work.c
+ */
+#ifdef CONFIG_SLOW_WORK_PROC
+extern struct slow_work *slow_work_execs[];
+extern pid_t slow_work_pids[];
+extern rwlock_t slow_work_execs_lock;
+#endif
+
+extern struct list_head slow_work_queue;
+extern struct list_head vslow_work_queue;
+extern spinlock_t slow_work_queue_lock;
+
+/*
+ * slow-work-proc.c
+ */
+#ifdef CONFIG_SLOW_WORK_PROC
+extern const struct file_operations slow_work_runqueue_fops;
+
+extern void slow_work_new_thread_desc(struct slow_work *, struct seq_file *);
+#endif
+
+/*
+ * Helper functions
+ */
+static inline void slow_work_set_thread_pid(int id, pid_t pid)
+{
+#ifdef CONFIG_SLOW_WORK_PROC
+ slow_work_pids[id] = pid;
+#endif
+}
+
+static inline void slow_work_mark_time(struct slow_work *work)
+{
+#ifdef CONFIG_SLOW_WORK_PROC
+ work->mark = CURRENT_TIME;
+#endif
+}
+
+static inline void slow_work_begin_exec(int id, struct slow_work *work)
+{
+#ifdef CONFIG_SLOW_WORK_PROC
+ slow_work_execs[id] = work;
+#endif
+}
+
+static inline void slow_work_end_exec(int id, struct slow_work *work)
+{
+#ifdef CONFIG_SLOW_WORK_PROC
+ write_lock(&slow_work_execs_lock);
+ slow_work_execs[id] = NULL;
+ write_unlock(&slow_work_execs_lock);
+#endif
+}
* ensure that the addition of a single element in the tree cannot fail. On
* success, return zero, with preemption disabled. On error, return -ENOMEM
* with preemption not disabled.
+ *
+ * To make use of this facility, the radix tree must be initialised without
+ * __GFP_WAIT being passed to INIT_RADIX_TREE().
*/
int radix_tree_preload(gfp_t gfp_mask)
{
}
EXPORT_SYMBOL(radix_tree_tag_clear);
-#ifndef __KERNEL__ /* Only the test harness uses this at present */
/**
* radix_tree_tag_get - get a tag on a radix tree node
* @root: radix tree root
}
}
EXPORT_SYMBOL(radix_tree_tag_get);
-#endif
/**
* radix_tree_next_hole - find the next hole (not-present entry)
/*
* Finally, kill the kernel threads. We don't need to be RCU
- * safe anymore, since the bdi is gone from visibility.
+ * safe anymore, since the bdi is gone from visibility. Force
+ * unfreeze of the thread before calling kthread_stop(), otherwise
+ * it would never exet if it is currently stuck in the refrigerator.
*/
- list_for_each_entry(wb, &bdi->wb_list, list)
+ list_for_each_entry(wb, &bdi->wb_list, list) {
+ wb->task->flags &= ~PF_FROZEN;
kthread_stop(wb->task);
+ }
}
/*
$< -s $(Kconfig)
localmodconfig: $(obj)/streamline_config.pl $(obj)/conf
- $(Q)perl $< $(Kconfig) > .tmp.config
+ $(Q)perl $< $(srctree) $(Kconfig) > .tmp.config
$(Q)if [ -f .config ]; then \
cmp -s .tmp.config .config || \
(mv -f .config .config.old.1; \
$(Q)rm -f .tmp.config
localyesconfig: $(obj)/streamline_config.pl $(obj)/conf
- $(Q)perl $< $(Kconfig) > .tmp.config
+ $(Q)perl $< $(srctree) $(Kconfig) > .tmp.config
$(Q)sed -i s/=m/=y/ .tmp.config
$(Q)if [ -f .config ]; then \
cmp -s .tmp.config .config || \
# make oldconfig
#
my $config = ".config";
-my $linuxpath = ".";
my $uname = `uname -r`;
chomp $uname;
find_config;
-my @makefiles = `find $linuxpath -name Makefile`;
+# Get the build source and top level Kconfig file (passed in)
+my $ksource = $ARGV[0];
+my $kconfig = $ARGV[1];
+
+my @makefiles = `find $ksource -name Makefile`;
my %depends;
my %selects;
my %prompts;
my $var;
my $cont = 0;
-# Get the top level Kconfig file (passed in)
-my $kconfig = $ARGV[0];
-
# prevent recursion
my %read_kconfigs;
my $config;
my @kconfigs;
- open(KIN, $kconfig) || die "Can't open $kconfig";
+ open(KIN, "$ksource/$kconfig") || die "Can't open $kconfig";
while (<KIN>) {
chomp;
int err;
aaci_pcm_hw_free(substream);
+ if (aacirun->pcm_open) {
+ snd_ac97_pcm_close(aacirun->pcm);
+ aacirun->pcm_open = 0;
+ }
err = devdma_hw_alloc(NULL, substream,
params_buffer_bytes(params));
else
err = snd_ac97_pcm_open(aacirun->pcm, params_rate(params),
params_channels(params),
- aacirun->pcm->r[1].slots);
+ aacirun->pcm->r[0].slots);
if (err)
goto out;
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
- int i;
u16 reg;
/* Sync reg_cache with the hardware */
- for (reg = 0; reg < ARRAY_SIZE(tlv320aic23_reg); i++) {
+ for (reg = 0; reg < TLV320AIC23_RESET; reg++) {
u16 val = tlv320aic23_read_reg_cache(codec, reg);
tlv320aic23_write(codec, reg, val);
}
if (!w->power_check)
continue;
- power = w->power_check(w);
- if (power)
- sys_power = 1;
+ /* If we're suspending then pull down all the
+ * power. */
+ switch (event) {
+ case SND_SOC_DAPM_STREAM_SUSPEND:
+ power = 0;
+ break;
+
+ default:
+ power = w->power_check(w);
+ if (power)
+ sys_power = 1;
+ break;
+ }
if (w->power == power)
continue;
case SND_SOC_DAPM_STREAM_RESUME:
sys_power = 1;
break;
+ case SND_SOC_DAPM_STREAM_SUSPEND:
+ sys_power = 0;
+ break;
case SND_SOC_DAPM_STREAM_NOP:
sys_power = codec->bias_level != SND_SOC_BIAS_STANDBY;
+ break;
default:
break;
}
git.openpandora.org / pandora-kernel.git / commitdiff