linux-kernel - [PATCH v4 4/5] sched/core: Make cpu cgroup controller bypassable

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Date:   Tue, 20 Nov 2018 12:51:28 -0500
From:   Waiman Long <longman@...hat.com>
To:     Tejun Heo <tj@...nel.org>, Li Zefan <lizefan@...wei.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Jonathan Corbet <corbet@....net>
Cc:     cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, Roman Gushchin <guro@...com>,
        Jens Axboe <axboe@...nel.dk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Dennis Zhou <dennis@...nel.org>,
        Shakeel Butt <shakeelb@...gle.com>,
        Waiman Long <longman@...hat.com>
Subject: [PATCH v4 4/5] sched/core: Make cpu cgroup controller bypassable

Make the cpu cgroup controller bypassable in the default hierarchy so
that cpu controller could be activated only in those cgroups that really
need it instead of all the cgroups down to the lowest level that need it.

Signed-off-by: Waiman Long <longman@...hat.com>
---
 kernel/sched/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index f12225f..ba4550c 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -7000,6 +7000,7 @@ struct cgroup_subsys cpu_cgrp_subsys = {
 	.dfl_cftypes	= cpu_files,
 	.early_init	= true,
 	.threaded	= true,
+	.bypassable	= true,
 };
 
 #endif	/* CONFIG_CGROUP_SCHED */
-- 
1.8.3.1