From e5fa81408fb43ebabde65938ef8b20ae879017e7 Mon Sep 17 00:00:00 2001 From: Aleksei Zakharov Date: Fri, 8 Feb 2019 19:14:05 +0300 Subject: [PATCH] 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 Signed-off-by: Jens Axboe --- block/blk-mq.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/block/blk-mq.c b/block/blk-mq.c index 8a825aebc6b5..44d471ff8754 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -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); -- 2.30.2