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blk-iocost: disable writeback throttling 

Commit b5dc5d4d1f ("block,bfq: Disable writeback throttling") disable
wbt for bfq, because different write-throttling heuristics should not
work together.

For the same reason, wbt and iocost should not work together as well,
unless admin really want to do that, dispite that performance is
affected.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20221012094035.390056-2-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Yu Kuai 2022-10-12 17:40:32 +08:00 committed by Jens Axboe
parent 247f34f7b8
commit 8796acbc9a
1 changed files with 2 additions and 0 deletions
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2
block/blk-iocost.c
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@ -3264,9 +3264,11 @@ static ssize_t ioc_qos_write(struct kernfs_open_file *of, char *input,
blk_stat_enable_accounting(disk->queue);
blk_queue_flag_set(QUEUE_FLAG_RQ_ALLOC_TIME, disk->queue);
ioc->enabled = true;
wbt_disable_default(disk->queue);
} else {
blk_queue_flag_clear(QUEUE_FLAG_RQ_ALLOC_TIME, disk->queue);
ioc->enabled = false;
wbt_enable_default(disk->queue);
}
if (user) {