From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCHSET for-4.11] cgroup: implement cgroup v2 thread mode
Date: Thu, 9 Feb 2017 15:47:04 +0100
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To: Paul Turner <pjt@google.com>
Cc: Tejun Heo <tj@kernel.org>, lizefan@huawei.com, Johannes Weiner <hannes@cmpxchg.org>, Ingo Molnar <mingo@redhat.com>, Andy Lutomirski <luto@amacapital.net>, Mike Galbraith <efault@gmx.de>, cgroups <cgroups@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>, kernel-team <kernel-team@fb.com>, lvenanci@redhat.com, Linus Torvalds <torvalds@linux-foundation.org>, Andrew Morton <akpm@linux-foundation.org>

On Thu, Feb 09, 2017 at 05:07:16AM -0800, Paul Turner wrote:
> The only case that this does not support vs ".threads" would be some
> hybrid where we co-mingle threads from different processes (with the
> processes belonging to the same node in the hierarchy).  I'm not aware
> of any usage that looks like this.

If I understand you right; this is a fairly common thing with RT where
we would stuff all the !rt threads of the various processes in a 'misc'
bucket.

Similarly, it happens that we stuff the various rt threads of processes
in a specific (shared) 'rt' bucket.

So I would certainly not like to exclude that setup.