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

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Message-ID: <YRQVFkNX5DcKixzy@slm.duckdns.org>
Date:   Wed, 11 Aug 2021 08:21:10 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Waiman Long <llong@...hat.com>
Cc:     Zefan Li <lizefan.x@...edance.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Jonathan Corbet <corbet@....net>,
        Shuah Khan <shuah@...nel.org>, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kselftest@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Roman Gushchin <guro@...com>, Phil Auld <pauld@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Frederic Weisbecker <frederic@...nel.org>,
        Marcelo Tosatti <mtosatti@...hat.com>,
        Michal Koutný <mkoutny@...e.com>
Subject: Re: [PATCH v4 4/6] cgroup/cpuset: Allow non-top parent partition
 root to distribute out all CPUs

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