linux-kernel - Re: [PATCH v9 4/7] cgroup/cpuset: Add a new isolated cpus.partition type

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Message-ID: <Yd9G27Jhn6XpCArg@slm.duckdns.org>
Date:   Wed, 12 Jan 2022 11:23:39 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Waiman Long <longman@...hat.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        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>,
        Juri Lelli <juri.lelli@...hat.com>,
        Frederic Weisbecker <frederic@...nel.org>,
        Marcelo Tosatti <mtosatti@...hat.com>,
        Michal Koutný <mkoutny@...e.com>
Subject: Re: [PATCH v9 4/7] cgroup/cpuset: Add a new isolated cpus.partition
 type

On Wed, Jan 12, 2022 at 10:40:01AM -0500, Waiman Long wrote:
> Yes, that is a possible workaround. However, it makes cgroup management much
> harder especially in the cgroup v2 environment where multiple controllers
> are likely to be enabled in the same cgroup.

In most cases, cgroup2 shouldn't be a problem here given that controllers
can be enabled selectively and this 1-cpu cgroups will most likely be
leaves. But yeah, not super convenient.

Thanks.

-- 
tejun