linux-kernel - Re: [PATCH v3 3/9] cgroup/cpuset: Fix violation of cpuset locking rule

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Message-ID: <YP9A2Im5r30s58g1@slm.duckdns.org>
Date:   Mon, 26 Jul 2021 13:10:16 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Waiman Long <longman@...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 v3 3/9] cgroup/cpuset: Fix violation of cpuset locking
 rule

On Tue, Jul 20, 2021 at 10:18:28AM -0400, Waiman Long wrote:
> The cpuset fields that manage partition root state do not strictly
> follow the cpuset locking rule that update to cpuset has to be done
> with both the callback_lock and cpuset_mutex held. This is now fixed
> by making sure that the locking rule is upheld.
> 
> Fixes: 3881b86128d0 ("cpuset: Add an error state to cpuset.sched.partition")
> Fixes: 4b842da276a8 ("cpuset: Make CPU hotplug work with partition)
> Signed-off-by: Waiman Long <longman@...hat.com>

Applied to cgroup/for-5.15.

Thanks.

-- 
tejun