Re: [PATCH v4 4/6] cgroup/cpuset: Allow non-top parent partition root to distribute out all CPUs

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To: Waiman Long <llong@xxxxxxxxxx>
Subject: Re: [PATCH v4 4/6] cgroup/cpuset: Allow non-top parent partition root to distribute out all CPUs
From: Tejun Heo <tj@xxxxxxxxxx>
Date: Wed, 11 Aug 2021 08:21:10 -1000
Cc: Zefan Li <lizefan.x@xxxxxxxxxxxxx>, Johannes Weiner <hannes@xxxxxxxxxxx>, Jonathan Corbet <corbet@xxxxxxx>, Shuah Khan <shuah@xxxxxxxxxx>, cgroups@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, linux-kselftest@xxxxxxxxxxxxxxx, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Roman Gushchin <guro@xxxxxx>, Phil Auld <pauld@xxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Juri Lelli <juri.lelli@xxxxxxxxxx>, Frederic Weisbecker <frederic@xxxxxxxxxx>, Marcelo Tosatti <mtosatti@xxxxxxxxxx>, Michal Koutný <mkoutny@xxxxxxxx>
In-reply-to: <abfa6f2f-aa13-f18e-5a16-f568082d07bc@redhat.com>
References: <20210811030607.13824-1-longman@redhat.com> <20210811030607.13824-5-longman@redhat.com> <YRQTTf+bJZ8f3O3+@slm.duckdns.org> <abfa6f2f-aa13-f18e-5a16-f568082d07bc@redhat.com>

On Wed, Aug 11, 2021 at 02:18:17PM -0400, Waiman Long wrote:
> I don't think that is true. A task can reside anywhere in the cgroup
> hierarchy. I have encountered no problem moving tasks around.

Oh, that shouldn't be happening with controllers enabled. Can you please
share a repro?

Thanks.

-- 
tejun

Follow-Ups:
- Re: [PATCH v4 4/6] cgroup/cpuset: Allow non-top parent partition root to distribute out all CPUs
  - From: Waiman Long

References:
- [PATCH-cgroup v4 0/6] cgroup/cpuset: Add new cpuset partition type & empty effecitve cpus
  - From: Waiman Long
- [PATCH v4 4/6] cgroup/cpuset: Allow non-top parent partition root to distribute out all CPUs
  - From: Waiman Long
- Re: [PATCH v4 4/6] cgroup/cpuset: Allow non-top parent partition root to distribute out all CPUs
  - From: Tejun Heo
- Re: [PATCH v4 4/6] cgroup/cpuset: Allow non-top parent partition root to distribute out all CPUs
  - From: Waiman Long

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