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| author | Mike Snitzer <snitzer@redhat.com> | 2016-09-14 13:28:30 -0400 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-09-14 11:48:34 -0600 |
| commit | 2849450ad39d2e699fda2d5c6f41e05d87fd7004 (patch) | |
| tree | 086e7fd583a30bdefcfe01bd3fef60eeda4ad742 | |
| parent | c5c5ca777469f0ff854f1da0aff9b3a9051b3ef7 (diff) | |
| download | linux-2849450ad39d2e699fda2d5c6f41e05d87fd7004.tar.gz linux-2849450ad39d2e699fda2d5c6f41e05d87fd7004.tar.bz2 linux-2849450ad39d2e699fda2d5c6f41e05d87fd7004.zip | |
blk-mq: introduce blk_mq_delay_kick_requeue_list()
blk_mq_delay_kick_requeue_list() provides the ability to kick the
q->requeue_list after a specified time. To do this the request_queue's
'requeue_work' member was changed to a delayed_work.
blk_mq_delay_kick_requeue_list() allows DM to defer processing requeued
requests while it doesn't make sense to immediately requeue them
(e.g. when all paths in a DM multipath have failed).
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | block/blk-mq.c | 16 | ||||
| -rw-r--r-- | include/linux/blk-mq.h | 1 | ||||
| -rw-r--r-- | include/linux/blkdev.h | 2 |
3 files changed, 14 insertions, 5 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index eea0d230faa1..7ddc7969fba4 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -502,7 +502,7 @@ EXPORT_SYMBOL(blk_mq_requeue_request); static void blk_mq_requeue_work(struct work_struct *work) { struct request_queue *q = - container_of(work, struct request_queue, requeue_work); + container_of(work, struct request_queue, requeue_work.work); LIST_HEAD(rq_list); struct request *rq, *next; unsigned long flags; @@ -557,16 +557,24 @@ EXPORT_SYMBOL(blk_mq_add_to_requeue_list); void blk_mq_cancel_requeue_work(struct request_queue *q) { - cancel_work_sync(&q->requeue_work); + cancel_delayed_work_sync(&q->requeue_work); } EXPORT_SYMBOL_GPL(blk_mq_cancel_requeue_work); void blk_mq_kick_requeue_list(struct request_queue *q) { - kblockd_schedule_work(&q->requeue_work); + kblockd_schedule_delayed_work(&q->requeue_work, 0); } EXPORT_SYMBOL(blk_mq_kick_requeue_list); +void blk_mq_delay_kick_requeue_list(struct request_queue *q, + unsigned long msecs) +{ + kblockd_schedule_delayed_work(&q->requeue_work, + msecs_to_jiffies(msecs)); +} +EXPORT_SYMBOL(blk_mq_delay_kick_requeue_list); + void blk_mq_abort_requeue_list(struct request_queue *q) { unsigned long flags; @@ -2084,7 +2092,7 @@ struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set, q->sg_reserved_size = INT_MAX; - INIT_WORK(&q->requeue_work, blk_mq_requeue_work); + INIT_DELAYED_WORK(&q->requeue_work, blk_mq_requeue_work); INIT_LIST_HEAD(&q->requeue_list); spin_lock_init(&q->requeue_lock); diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index ff14f68067aa..60ef14cbcd2d 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -233,6 +233,7 @@ void blk_mq_requeue_request(struct request *rq); void blk_mq_add_to_requeue_list(struct request *rq, bool at_head); void blk_mq_cancel_requeue_work(struct request_queue *q); void blk_mq_kick_requeue_list(struct request_queue *q); +void blk_mq_delay_kick_requeue_list(struct request_queue *q, unsigned long msecs); void blk_mq_abort_requeue_list(struct request_queue *q); void blk_mq_complete_request(struct request *rq, int error); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 69aae720f4ef..c47c358ba052 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -449,7 +449,7 @@ struct request_queue { struct list_head requeue_list; spinlock_t requeue_lock; - struct work_struct requeue_work; + struct delayed_work requeue_work; struct mutex sysfs_lock; |