Commit e5fa8140 authored Feb 08, 2019 by Aleksei Zakharov Committed by Jens Axboe Feb 08, 2019

block: avoid setting nr_requests to current value



There's no reason to freeze queue and set nr_requests value
if current value is the same.

Signed-off-by: Aleksei Zakharov <zakharov.a.g@yandex.ru>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent f25191bb

block/blk-mq.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -3089,6 +3089,9 @@ int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr)
		if (!set)
		return -EINVAL;

		if (q->nr_requests == nr)
		return 0;

		blk_mq_freeze_queue(q);
		blk_mq_quiesce_queue(q);

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