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blk-iocost: fix queue stats accounting 

The q->stats->accounting is not only used by iocost, but iocost only
increase this counter, never decrease it. So queue stats accounting
will always enabled after using iocost once.

Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230804070609.31623-1-chengming.zhou@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Chengming Zhou 2023-08-04 15:06:09 +08:00 committed by Jens Axboe
parent 2bc0576925
commit f099a108ca
1 changed files with 3 additions and 2 deletions
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5
block/blk-iocost.c
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@ -3301,11 +3301,12 @@ static ssize_t ioc_qos_write(struct kernfs_open_file *of, char *input,
if (qos[QOS_MIN] > qos[QOS_MAX])
goto einval;
if (enable) {
if (enable && !ioc->enabled) {
blk_stat_enable_accounting(disk->queue);
blk_queue_flag_set(QUEUE_FLAG_RQ_ALLOC_TIME, disk->queue);
ioc->enabled = true;
} else {
} else if (!enable && ioc->enabled) {
blk_stat_disable_accounting(disk->queue);
blk_queue_flag_clear(QUEUE_FLAG_RQ_ALLOC_TIME, disk->queue);
ioc->enabled = false;
}