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Subject[PATCH cgroup/for-4.15-fixes] cgroup: add warning about RT not being supported on cgroup2
From: Tejun Heo <tj@kernel.org>
Date: Tue, 5 Dec 2017 09:10:17 -0800

We haven't yet figured out what to do with RT threads on cgroup2.
Document the limitation.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>
---
Documentation/cgroup-v2.txt | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/Documentation/cgroup-v2.txt b/Documentation/cgroup-v2.txt
index 779211f..55a28f4 100644
--- a/Documentation/cgroup-v2.txt
+++ b/Documentation/cgroup-v2.txt
@@ -898,6 +898,10 @@ controller implements weight and absolute bandwidth limit models for
normal scheduling policy and absolute bandwidth allocation model for
realtime scheduling policy.

+WARNING: cgroup2 doesn't yet support control of realtime processes and
+the cpu controller can only be enabled when all RT processes are in
+the root cgroup.
+

CPU Interface Files
~~~~~~~~~~~~~~~~~~~
--
2.9.5
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