blk-mq: fix nr_requests wrong value when modify it from sysfs

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if blk-mq use "none" io scheduler, nr_request get a wrong value when
input a number > tag_set->queue_depth. blk_mq_tag_update_depth will get
the smaller one min(nr, set->queue_depth), and then q->nr_request get a
wrong value.

Reproduce:

echo none > /sys/block/nvme0n1/queue/scheduler
echo 1000000 > /sys/block/nvme0n1/queue/nr_requests
cat /sys/block/nvme0n1/queue/nr_requests
1000000

Signed-off-by: weiping zhang <zhangweiping@didichuxing.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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This commit is contained in:

weiping zhang 2017-09-22 23:36:28 +08:00 • committed by Jens Axboe

parent a116895fc7

commit c2e82a2348

1 changed files with 1 additions and 2 deletions

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block/blk-mq.c

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