From 43ada78781246cb36036f26158a645c17550ac54 Mon Sep 17 00:00:00 2001 From: Liu Bo Date: Fri, 29 Jun 2018 09:56:56 +0800 Subject: [PATCH] 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 Signed-off-by: Jens Axboe --- block/blk-throttle.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/block/blk-throttle.c b/block/blk-throttle.c index 82282e6fdcf8..63bb261811dd 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -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();