From 2849450ad39d2e699fda2d5c6f41e05d87fd7004 Mon Sep 17 00:00:00 2001 From: Mike Snitzer Date: Wed, 14 Sep 2016 13:28:30 -0400 Subject: 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 Signed-off-by: Jens Axboe --- block/blk-mq.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) (limited to 'block') 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); -- cgit v1.2.3-58-ga151