diff options
| author | Aleksei Zakharov <zakharov.a.g@yandex.ru> | 2019-02-08 17:14:05 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-02-08 20:43:25 +0100 |
| commit | e5fa81408fb43ebabde65938ef8b20ae879017e7 (patch) | |
| tree | 03db0911459410e6d675d08655f139cd1df19087 /block | |
| parent | cdrom: Fix race condition in cdrom_sysctl_register (diff) | |
| download | linux-e5fa81408fb43ebabde65938ef8b20ae879017e7.tar.xz linux-e5fa81408fb43ebabde65938ef8b20ae879017e7.zip | |
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>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-mq.c | 3 |
1 files changed, 3 insertions, 0 deletions
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); |