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Block: blk-throttle: set low_valid immediately once one cgroup has io.low configured 

Once one cgroup has io.low configured, @low_valid becomes true and other
cgroups won't switch it back whatsoever.

Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Liu Bo 2018-06-29 09:56:56 +08:00 committed by Jens Axboe
parent e1a413245a
commit 43ada78781
1 changed files with 3 additions and 1 deletions
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4
block/blk-throttle.c
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@ -579,8 +579,10 @@ static void blk_throtl_update_limit_valid(struct throtl_data *td)
struct throtl_grp *tg = blkg_to_tg(blkg);
if (tg->bps[READ][LIMIT_LOW] || tg->bps[WRITE][LIMIT_LOW] ||
tg->iops[READ][LIMIT_LOW] || tg->iops[WRITE][LIMIT_LOW])
tg->iops[READ][LIMIT_LOW] || tg->iops[WRITE][LIMIT_LOW]) {
low_valid = true;
break;
}
}
rcu_read_unlock();