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blk-mq-sched: don't add flushes to the head of requeue queue 

If we are currently out of driver tags, we don't want to add a
new flush (without a tag) to the head of the requeue list. We
want to add it to the back, behind the others that are
potentially also waiting for a tag.

Signed-off-by: Jens Axboe <axboe@fb.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
This commit is contained in:
Jens Axboe 2017-02-17 11:37:14 -07:00
parent 2aa0f21d54
commit c7a571b450
1 changed files with 1 additions and 1 deletions
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2
block/blk-mq-sched.c
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@ -351,7 +351,7 @@ static void blk_mq_sched_insert_flush(struct blk_mq_hw_ctx *hctx,
blk_insert_flush(rq);
blk_mq_run_hw_queue(hctx, true);
} else
blk_mq_add_to_requeue_list(rq, true, true);
blk_mq_add_to_requeue_list(rq, false, true);
}
void blk_mq_sched_insert_request(struct request *rq, bool at_head,