[PATCH] Make sure to always check upper bits of tv_nsec in timespec_valid.

[pandora-kernel.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 0dc848b..1cbcf65 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -471,14 +471,15 @@ running once the system is up.
                        arch/i386/kernel/cpu/cpufreq/elanfreq.c.
 
        elevator=       [IOSCHED]
-                       Format: {"as" | "cfq" | "deadline" | "noop"}
+                       Format: {"anticipatory" | "cfq" | "deadline" | "noop"}
                        See Documentation/block/as-iosched.txt and
                        Documentation/block/deadline-iosched.txt for details.
 
-       elfcorehdr=     [IA-32]
+       elfcorehdr=     [IA-32, X86_64]
                        Specifies physical address of start of kernel core
-                       image elf header.
-                       See Documentation/kdump.txt for details.
+                       image elf header. Generally kexec loader will
+                       pass this option to capture kernel.
+                       See Documentation/kdump/kdump.txt for details.
 
        enforcing       [SELINUX] Set initial enforcing status.
                        Format: {"0" | "1"}
@@ -711,9 +712,17 @@ running once the system is up.
        load_ramdisk=   [RAM] List of ramdisks to load from floppy
                        See Documentation/ramdisk.txt.
 
-       lockd.udpport=  [NFS]
+       lockd.nlm_grace_period=P  [NFS] Assign grace period.
+                       Format: <integer>
+
+       lockd.nlm_tcpport=N     [NFS] Assign TCP port.
+                       Format: <integer>
 
-       lockd.tcpport=  [NFS]
+       lockd.nlm_timeout=T     [NFS] Assign timeout value.
+                       Format: <integer>
+
+       lockd.nlm_udpport=M     [NFS] Assign UDP port.
+                       Format: <integer>
 
        logibm.irq=     [HW,MOUSE] Logitech Bus Mouse Driver
                        Format: <irq>
@@ -832,7 +841,7 @@ running once the system is up.
        mem=nopentium   [BUGS=IA-32] Disable usage of 4MB pages for kernel
                        memory.
 
-       memmap=exactmap [KNL,IA-32] Enable setting of an exact
+       memmap=exactmap [KNL,IA-32,X86_64] Enable setting of an exact
                        E820 memory map, as specified by the user.
                        Such memmap=exactmap lines can be constructed based on
                        BIOS output or other requirements. See the memmap=nn@ss
@@ -855,6 +864,49 @@ running once the system is up.
 
        mga=            [HW,DRM]
 
+       migration_cost=
+                       [KNL,SMP] debug: override scheduler migration costs
+                       Format: <level-1-usecs>,<level-2-usecs>,...
+                       This debugging option can be used to override the
+                       default scheduler migration cost matrix. The numbers
+                       are indexed by 'CPU domain distance'.
+                       E.g. migration_cost=1000,2000,3000 on an SMT NUMA
+                       box will set up an intra-core migration cost of
+                       1 msec, an inter-core migration cost of 2 msecs,
+                       and an inter-node migration cost of 3 msecs.
+
+                       WARNING: using the wrong values here can break
+                       scheduler performance, so it's only for scheduler
+                       development purposes, not production environments.
+
+       migration_debug=
+                       [KNL,SMP] migration cost auto-detect verbosity
+                       Format=<0|1|2>
+                       If a system's migration matrix reported at bootup
+                       seems erroneous then this option can be used to
+                       increase verbosity of the detection process.
+                       We default to 0 (no extra messages), 1 will print
+                       some more information, and 2 will be really
+                       verbose (probably only useful if you also have a
+                       serial console attached to the system).
+
+       migration_factor=
+                       [KNL,SMP] multiply/divide migration costs by a factor
+                       Format=<percent>
+                       This debug option can be used to proportionally
+                       increase or decrease the auto-detected migration
+                       costs for all entries of the migration matrix.
+                       E.g. migration_factor=150 will increase migration
+                       costs by 50%. (and thus the scheduler will be less
+                       eager migrating cache-hot tasks)
+                       migration_factor=80 will decrease migration costs
+                       by 20%. (thus the scheduler will be more eager to
+                       migrate tasks)
+
+                       WARNING: using the wrong values here can break
+                       scheduler performance, so it's only for scheduler
+                       development purposes, not production environments.
+
        mousedev.tap_time=
                        [MOUSE] Maximum time between finger touching and
                        leaving touchpad surface for touch to be considered