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blk-mq: Avoid that blk_mq_delay_run_hw_queue() introduces unintended delays

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Make sure that calling blk_mq_run_hw_queue() or
blk_mq_kick_requeue_list() triggers a queue run without delay even
if blk_mq_delay_run_hw_queue() has been called recently and if its
delay has not yet expired.

Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Bart Van Assche 2018-01-19 08:58:55 -08:00 committed by Jens Axboe
parent c77ff7fd03
commit ae943d2062
1 changed files with 3 additions and 4 deletions
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7
block/blk-mq.c
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@ -785,7 +785,7 @@ EXPORT_SYMBOL(blk_mq_add_to_requeue_list);
void blk_mq_kick_requeue_list(struct request_queue *q) void blk_mq_kick_requeue_list(struct request_queue *q)
{ {
kblockd_schedule_delayed_work(&q->requeue_work, 0); kblockd_mod_delayed_work_on(WORK_CPU_UNBOUND, &q->requeue_work, 0);
} }
EXPORT_SYMBOL(blk_mq_kick_requeue_list); EXPORT_SYMBOL(blk_mq_kick_requeue_list);
@ -1401,9 +1401,8 @@ static void __blk_mq_delay_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async,
put_cpu(); put_cpu();
} }
kblockd_schedule_delayed_work_on(blk_mq_hctx_next_cpu(hctx), kblockd_mod_delayed_work_on(blk_mq_hctx_next_cpu(hctx), &hctx->run_work,
&hctx->run_work, msecs_to_jiffies(msecs));
msecs_to_jiffies(msecs));
} }
void blk_mq_delay_run_hw_queue(struct blk_mq_hw_ctx *hctx, unsigned long msecs) void blk_mq_delay_run_hw_queue(struct blk_mq_hw_ctx *hctx, unsigned long msecs)