From 432586c57e130af6589dcde818345de09c1460fb Mon Sep 17 00:00:00 2001 From: Joseph Qi Date: Tue, 12 Dec 2017 19:05:51 +0800 Subject: [PATCH] block-throttle: enable hierarchical throttling even on traditional hierarchy ECI may have an use case that configuring each device mapper disk throttling policy just under root blkio cgroup, but actually using them in different containers. Since hierarchical throttling is now only supported on cgroup v2 and ECI uses cgroup v1, so we have to enable hierarchical throttling on cgroup v1. This is ported from redhat 7u, and a year ago Jiufei already ported it to alikernel 4.9 as well. So I think this change should be acceptable. Signed-off-by: Joseph Qi Reviewed-by: Jiufei Xue --- 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 01d0620a4e4a..717c33481f7d 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -535,7 +535,9 @@ static void throtl_pd_init(struct blkg_policy_data *pd) * regardless of the position of the group in the hierarchy. */ sq->parent_sq = &td->service_queue; - if (cgroup_subsys_on_dfl(io_cgrp_subsys) && blkg->parent) + + /* Enable hierarchical throttling even on traditional hierarchy */ + if (blkg->parent) sq->parent_sq = &blkg_to_tg(blkg->parent)->service_queue; tg->td = td; } -- GitLab