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blk-mq: Add a kick_requeue_list argument to blk_mq_requeue_request()

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Most blk_mq_requeue_request() and blk_mq_add_to_requeue_list() calls
are followed by kicking the requeue list. Hence add an argument to
these two functions that allows to kick the requeue list. This was
proposed by Christoph Hellwig.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Bart Van Assche 2016-10-28 17:21:41 -07:00 committed by Jens Axboe
parent 6a83e74d21
commit 2b053aca76
7 changed files with 15 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
block/blk-flush.c
View File

@ -134,10 +134,7 @@ static void blk_flush_restore_request(struct request *rq)
static bool blk_flush_queue_rq(struct request *rq, bool add_front)
{
if (rq->q->mq_ops) {
struct request_queue *q = rq->q;
blk_mq_add_to_requeue_list(rq, add_front);
blk_mq_kick_requeue_list(q);
blk_mq_add_to_requeue_list(rq, add_front, true);
return false;
} else {
if (add_front)

10
block/blk-mq.c
View File

@ -492,12 +492,12 @@ static void __blk_mq_requeue_request(struct request *rq)
}
}
void blk_mq_requeue_request(struct request *rq)
void blk_mq_requeue_request(struct request *rq, bool kick_requeue_list)
{
__blk_mq_requeue_request(rq);
BUG_ON(blk_queued_rq(rq));
blk_mq_add_to_requeue_list(rq, true);
blk_mq_add_to_requeue_list(rq, true, kick_requeue_list);
}
EXPORT_SYMBOL(blk_mq_requeue_request);
@ -531,7 +531,8 @@ static void blk_mq_requeue_work(struct work_struct *work)
blk_mq_run_hw_queues(q, false);
}
void blk_mq_add_to_requeue_list(struct request *rq, bool at_head)
void blk_mq_add_to_requeue_list(struct request *rq, bool at_head,
bool kick_requeue_list)
{
struct request_queue *q = rq->q;
unsigned long flags;
@ -550,6 +551,9 @@ void blk_mq_add_to_requeue_list(struct request *rq, bool at_head)
list_add_tail(&rq->queuelist, &q->requeue_list);
}
spin_unlock_irqrestore(&q->requeue_lock, flags);
if (kick_requeue_list)
blk_mq_kick_requeue_list(q);
}
EXPORT_SYMBOL(blk_mq_add_to_requeue_list);

2
drivers/block/xen-blkfront.c
View File

@ -2043,7 +2043,7 @@ static int blkif_recover(struct blkfront_info *info)
/* Requeue pending requests (flush or discard) */
list_del_init(&req->queuelist);
BUG_ON(req->nr_phys_segments > segs);
blk_mq_requeue_request(req);
blk_mq_requeue_request(req, false);
}
blk_mq_start_stopped_hw_queues(info->rq, true);
blk_mq_kick_requeue_list(info->rq);

2
drivers/md/dm-rq.c
View File

@ -347,7 +347,7 @@ EXPORT_SYMBOL(dm_mq_kick_requeue_list);
static void dm_mq_delay_requeue_request(struct request *rq, unsigned long msecs)
{
blk_mq_requeue_request(rq);
blk_mq_requeue_request(rq, false);
__dm_mq_kick_requeue_list(rq->q, msecs);
}

2
drivers/nvme/host/core.c
View File

@ -203,7 +203,7 @@ void nvme_requeue_req(struct request *req)
{
unsigned long flags;
blk_mq_requeue_request(req);
blk_mq_requeue_request(req, false);
spin_lock_irqsave(req->q->queue_lock, flags);
if (!blk_queue_stopped(req->q))
blk_mq_kick_requeue_list(req->q);

4
drivers/scsi/scsi_lib.c
View File

@ -86,10 +86,8 @@ scsi_set_blocked(struct scsi_cmnd *cmd, int reason)
static void scsi_mq_requeue_cmd(struct scsi_cmnd *cmd)
{
struct scsi_device *sdev = cmd->device;
struct request_queue *q = cmd->request->q;
blk_mq_requeue_request(cmd->request);
blk_mq_kick_requeue_list(q);
blk_mq_requeue_request(cmd->request, true);
put_device(&sdev->sdev_gendev);
}

5
include/linux/blk-mq.h
View File

@ -218,8 +218,9 @@ void blk_mq_start_request(struct request *rq);
void blk_mq_end_request(struct request *rq, int error);
void __blk_mq_end_request(struct request *rq, int error);
void blk_mq_requeue_request(struct request *rq);
void blk_mq_add_to_requeue_list(struct request *rq, bool at_head);
void blk_mq_requeue_request(struct request *rq, bool kick_requeue_list);
void blk_mq_add_to_requeue_list(struct request *rq, bool at_head,
bool kick_requeue_list);
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);