Messages in this thread | | | From | "Michael Kerrisk (man-pages)" <> | Date | Tue, 5 Dec 2017 19:53:51 +0100 | Subject | Re: [PATCH v2 cgroup/for-4.15-fixes] cgroup: add warning about RT not being supported on cgroup2 |
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On 5 December 2017 at 19:29, Tejun Heo <tj@kernel.org> wrote: > From f0a821260f24ea9378ed0e0c149e3bbc1a1bd008 Mon Sep 17 00:00:00 2001 > 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. > > v2: Included the warning about system management software behavior as > suggested by Michael. > > Signed-off-by: Tejun Heo <tj@kernel.org> > Reported-by: "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> > --- > Documentation/cgroup-v2.txt | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/Documentation/cgroup-v2.txt b/Documentation/cgroup-v2.txt > index 779211f..c5e3c21 100644 > --- a/Documentation/cgroup-v2.txt > +++ b/Documentation/cgroup-v2.txt > @@ -898,6 +898,13 @@ 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. Be aware that that system management software may
Sorry, there was a fault in my text: s/that that/that/
Thanks,
Michael
-- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/
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