printk(KERN_INFO " sector %llu, nr/cnr %u/%u\n",
(unsigned long long)blk_rq_pos(rq),
blk_rq_sectors(rq), blk_rq_cur_sectors(rq));
- printk(KERN_INFO " bio %p, biotail %p, buffer %p, len %u\n",
- rq->bio, rq->biotail, rq->buffer, blk_rq_bytes(rq));
+ printk(KERN_INFO " bio %p, biotail %p, len %u\n",
+ rq->bio, rq->biotail, blk_rq_bytes(rq));
if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
printk(KERN_INFO " cdb: ");
struct blk_mq_hw_ctx *hctx;
int i;
- queue_for_each_hw_ctx(q, hctx, i)
- cancel_delayed_work_sync(&hctx->delayed_work);
+ queue_for_each_hw_ctx(q, hctx, i) {
+ cancel_delayed_work_sync(&hctx->run_work);
+ cancel_delayed_work_sync(&hctx->delay_work);
+ }
} else {
cancel_delayed_work_sync(&q->delay_work);
}
if (!q)
return NULL;
- if (percpu_counter_init(&q->mq_usage_counter, 0))
- goto fail_q;
-
q->id = ida_simple_get(&blk_queue_ida, 0, 0, gfp_mask);
if (q->id < 0)
- goto fail_c;
+ goto fail_q;
q->backing_dev_info.ra_pages =
(VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
bdi_destroy(&q->backing_dev_info);
fail_id:
ida_simple_remove(&blk_queue_ida, q->id);
-fail_c:
- percpu_counter_destroy(&q->mq_usage_counter);
fail_q:
kmem_cache_free(blk_requestq_cachep, q);
return NULL;
__freed_request(rl, sync ^ 1);
}
+int blk_update_nr_requests(struct request_queue *q, unsigned int nr)
+{
+ struct request_list *rl;
+
+ spin_lock_irq(q->queue_lock);
+ q->nr_requests = nr;
+ blk_queue_congestion_threshold(q);
+
+ /* congestion isn't cgroup aware and follows root blkcg for now */
+ rl = &q->root_rl;
+
+ if (rl->count[BLK_RW_SYNC] >= queue_congestion_on_threshold(q))
+ blk_set_queue_congested(q, BLK_RW_SYNC);
+ else if (rl->count[BLK_RW_SYNC] < queue_congestion_off_threshold(q))
+ blk_clear_queue_congested(q, BLK_RW_SYNC);
+
+ if (rl->count[BLK_RW_ASYNC] >= queue_congestion_on_threshold(q))
+ blk_set_queue_congested(q, BLK_RW_ASYNC);
+ else if (rl->count[BLK_RW_ASYNC] < queue_congestion_off_threshold(q))
+ blk_clear_queue_congested(q, BLK_RW_ASYNC);
+
+ blk_queue_for_each_rl(rl, q) {
+ if (rl->count[BLK_RW_SYNC] >= q->nr_requests) {
+ blk_set_rl_full(rl, BLK_RW_SYNC);
+ } else {
+ blk_clear_rl_full(rl, BLK_RW_SYNC);
+ wake_up(&rl->wait[BLK_RW_SYNC]);
+ }
+
+ if (rl->count[BLK_RW_ASYNC] >= q->nr_requests) {
+ blk_set_rl_full(rl, BLK_RW_ASYNC);
+ } else {
+ blk_clear_rl_full(rl, BLK_RW_ASYNC);
+ wake_up(&rl->wait[BLK_RW_ASYNC]);
+ }
+ }
+
+ spin_unlock_irq(q->queue_lock);
+ return 0;
+}
+
/*
* Determine if elevator data should be initialized when allocating the
* request associated with @bio.
struct request *blk_get_request(struct request_queue *q, int rw, gfp_t gfp_mask)
{
if (q->mq_ops)
- return blk_mq_alloc_request(q, rw, gfp_mask);
+ return blk_mq_alloc_request(q, rw, gfp_mask, false);
else
return blk_old_get_request(q, rw, gfp_mask);
}
static void part_round_stats_single(int cpu, struct hd_struct *part,
unsigned long now)
{
+ int inflight;
+
if (now == part->stamp)
return;
- if (part_in_flight(part)) {
+ inflight = part_in_flight(part);
+ if (inflight) {
__part_stat_add(cpu, part, time_in_queue,
- part_in_flight(part) * (now - part->stamp));
+ inflight * (now - part->stamp));
__part_stat_add(cpu, part, io_ticks, (now - part->stamp));
}
part->stamp = now;
rq->__data_len = rq->resid_len = len;
rq->nr_phys_segments = 1;
- rq->buffer = bio_data(bio);
}
EXPORT_SYMBOL_GPL(blk_add_request_payload);
bio->bi_next = req->bio;
req->bio = bio;
- /*
- * may not be valid. if the low level driver said
- * it didn't need a bounce buffer then it better
- * not touch req->buffer either...
- */
- req->buffer = bio_data(bio);
req->__sector = bio->bi_iter.bi_sector;
req->__data_len += bio->bi_iter.bi_size;
req->ioprio = ioprio_best(req->ioprio, bio_prio(bio));
* added on the elevator at this point. In addition, we don't have
* reliable access to the elevator outside queue lock. Only check basic
* merging parameters without querying the elevator.
+ *
+ * Caller must ensure !blk_queue_nomerges(q) beforehand.
*/
bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio,
unsigned int *request_count)
bool ret = false;
struct list_head *plug_list;
- if (blk_queue_nomerges(q))
- goto out;
-
plug = current->plug;
if (!plug)
goto out;
* Check if we can merge with the plugged list before grabbing
* any locks.
*/
- if (blk_attempt_plug_merge(q, bio, &request_count))
+ if (!blk_queue_nomerges(q) &&
+ blk_attempt_plug_merge(q, bio, &request_count))
return;
spin_lock_irq(q->queue_lock);
struct dentry *dir = fault_create_debugfs_attr("fail_make_request",
NULL, &fail_make_request);
- return IS_ERR(dir) ? PTR_ERR(dir) : 0;
+ return PTR_ERR_OR_ZERO(dir);
}
late_initcall(fail_make_request_debugfs);
}
req->__data_len -= total_bytes;
- req->buffer = bio_data(req->bio);
/* update sector only for requests with clear definition of sector */
if (req->cmd_type == REQ_TYPE_FS)
/*
* queue lock must be held
*/
-static void blk_finish_request(struct request *req, int error)
+void blk_finish_request(struct request *req, int error)
{
if (blk_rq_tagged(req))
blk_queue_end_tag(req->q, req);
__blk_put_request(req->q, req);
}
}
+EXPORT_SYMBOL(blk_finish_request);
/**
* blk_end_bidi_request - Complete a bidi request
/* Bit 0 (R/W) is identical in rq->cmd_flags and bio->bi_rw */
rq->cmd_flags |= bio->bi_rw & REQ_WRITE;
- if (bio_has_data(bio)) {
+ if (bio_has_data(bio))
rq->nr_phys_segments = bio_phys_segments(q, bio);
- rq->buffer = bio_data(bio);
- }
+
rq->__data_len = bio->bi_iter.bi_size;
rq->bio = rq->biotail = bio;
/*
* Copy attributes of the original request to the clone request.
- * The actual data parts (e.g. ->cmd, ->buffer, ->sense) are not copied.
+ * The actual data parts (e.g. ->cmd, ->sense) are not copied.
*/
static void __blk_rq_prep_clone(struct request *dst, struct request *src)
{
*
* Description:
* Clones bios in @rq_src to @rq, and copies attributes of @rq_src to @rq.
- * The actual data parts of @rq_src (e.g. ->cmd, ->buffer, ->sense)
+ * The actual data parts of @rq_src (e.g. ->cmd, ->sense)
* are not copied, and copying such parts is the caller's responsibility.
* Also, pages which the original bios are pointing to are not copied
* and the cloned bios just point same pages.
}
EXPORT_SYMBOL_GPL(blk_rq_prep_clone);
-int kblockd_schedule_work(struct request_queue *q, struct work_struct *work)
+int kblockd_schedule_work(struct work_struct *work)
{
return queue_work(kblockd_workqueue, work);
}
EXPORT_SYMBOL(kblockd_schedule_work);
-int kblockd_schedule_delayed_work(struct request_queue *q,
- struct delayed_work *dwork, unsigned long delay)
+int kblockd_schedule_delayed_work(struct delayed_work *dwork,
+ unsigned long delay)
{
return queue_delayed_work(kblockd_workqueue, dwork, delay);
}
EXPORT_SYMBOL(kblockd_schedule_delayed_work);
-#define PLUG_MAGIC 0x91827364
+int kblockd_schedule_delayed_work_on(int cpu, struct delayed_work *dwork,
+ unsigned long delay)
+{
+ return queue_delayed_work_on(cpu, kblockd_workqueue, dwork, delay);
+}
+EXPORT_SYMBOL(kblockd_schedule_delayed_work_on);
/**
* blk_start_plug - initialize blk_plug and track it inside the task_struct
{
struct task_struct *tsk = current;
- plug->magic = PLUG_MAGIC;
INIT_LIST_HEAD(&plug->list);
INIT_LIST_HEAD(&plug->mq_list);
INIT_LIST_HEAD(&plug->cb_list);
LIST_HEAD(list);
unsigned int depth;
- BUG_ON(plug->magic != PLUG_MAGIC);
-
flush_plug_callbacks(plug, from_schedule);
if (!list_empty(&plug->mq_list))
git.openpandora.org / pandora-kernel.git / blobdiff