blk-mq: don't restart queue when .get_budget returns BLK_STS_RESOURCE

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SCSI restarts its queue in scsi_end_request() automatically, so we don't
need to handle this case in blk-mq.

Especailly any request won't be dequeued in this case, we needn't to
worry about IO hang caused by restart vs. dispatch.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Ming Lei 2017-10-27 12:43:30 +08:00 • committed by Jens Axboe

parent 358a3a6bcc

commit 1f460b63d4

3 changed files with 23 additions and 32 deletions

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45

block/blk-mq-sched.c

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2

block/blk-mq-sched.h

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8

block/blk-mq.c

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