From: Mike Galbraith <umgwanakikbuti@gmail.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Zefan Li <lizefan@huawei.com>, Ingo Molnar <mingo@kernel.org>,
Tejun Heo <tj@kernel.org>, LKML <linux-kernel@vger.kernel.org>,
Cgroups <cgroups@vger.kernel.org>
Subject: Re: [PATCH] sched: Relax a restriction in sched_rt_can_attach()
Date: Mon, 04 May 2015 16:09:42 +0200 [thread overview]
Message-ID: <1430748582.3166.16.camel@gmail.com> (raw)
In-Reply-To: <20150504123738.GZ21418@twins.programming.kicks-ass.net>
On Mon, 2015-05-04 at 14:37 +0200, Peter Zijlstra wrote:
> On Mon, May 04, 2015 at 05:11:10PM +0800, Zefan Li wrote:
>
> > Some degree of flexibility is provided so that you may disable some controllers
> > in a subtree. For example:
> >
> > root ---> child1
> > (cpuset,memory,cpu) (cpuset,memory)
> > \
> > \-> child2
> > (cpu)
>
> Uhm, how does that work? Would a task their effective cgroup be the
> first parent that has a controller enabled?
>
> In particular, in your example, if T were part of child1, would its cpu
> controller be root?
That's what I'd hope for. I wanted to try that cgroup.subtree_control
gizmo to see for myself, but I don't have one, and probably won't get
one until I introduce systemd to my axe (again, it's a slow learner).
-Mike
next prev parent reply other threads:[~2015-05-04 14:09 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-04 0:54 [PATCH] sched: Relax a restriction in sched_rt_can_attach() Zefan Li
2015-05-04 0:54 ` Zefan Li
[not found] ` <5546C34C.7050202-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2015-05-04 3:13 ` Mike Galbraith
2015-05-04 3:13 ` Mike Galbraith
[not found] ` <1430709236.3129.42.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-05-04 4:39 ` Zefan Li
2015-05-04 4:39 ` Zefan Li
[not found] ` <5546F80B.3070802-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2015-05-04 5:10 ` Mike Galbraith
2015-05-04 5:10 ` Mike Galbraith
[not found] ` <1430716247.3129.44.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-05-04 5:39 ` Mike Galbraith
2015-05-04 5:39 ` Mike Galbraith
[not found] ` <1430717964.3129.62.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-05-04 9:11 ` Zefan Li
2015-05-04 9:11 ` Zefan Li
[not found] ` <554737AE.5040402-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2015-05-04 12:08 ` Mike Galbraith
2015-05-04 12:08 ` Mike Galbraith
2015-05-04 12:37 ` Peter Zijlstra
2015-05-04 12:37 ` Peter Zijlstra
2015-05-04 14:09 ` Mike Galbraith [this message]
[not found] ` <1430748582.3166.16.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-05-05 3:46 ` Zefan Li
2015-05-05 3:46 ` Zefan Li
[not found] ` <55483CF8.8030908-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2015-05-05 6:02 ` Mike Galbraith
2015-05-05 6:02 ` Mike Galbraith
[not found] ` <20150504123738.GZ21418-ndre7Fmf5hadTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2015-05-05 3:54 ` Zefan Li
2015-05-05 3:54 ` Zefan Li
2015-05-05 14:10 ` Peter Zijlstra
2015-05-05 14:18 ` Tejun Heo
2015-05-05 15:19 ` Peter Zijlstra
2015-05-05 16:31 ` Tejun Heo
2015-05-05 19:00 ` Peter Zijlstra
[not found] ` <20150505190057.GR23123-ndre7Fmf5hadTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2015-05-05 19:06 ` Tejun Heo
2015-05-05 19:06 ` Tejun Heo
[not found] ` <20150505190603.GZ1971-piEFEHQLUPpN0TnZuCh8vA@public.gmane.org>
2015-05-06 8:49 ` Peter Zijlstra
2015-05-06 8:49 ` Peter Zijlstra
2015-05-05 14:41 ` Tejun Heo
2015-05-05 15:11 ` Peter Zijlstra
2015-05-05 16:13 ` Tejun Heo
2015-05-05 16:50 ` Peter Zijlstra
2015-05-05 18:29 ` Thomas Gleixner
2015-05-05 19:00 ` Tejun Heo
2015-05-05 19:00 ` Tejun Heo
2015-05-06 9:12 ` Thomas Gleixner
2015-05-05 18:31 ` Tejun Heo
2015-05-05 14:09 ` Tejun Heo
2015-05-05 14:09 ` Tejun Heo
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