linux-kernel - Re: [PATCH] cgroup: Prevent double killing of css when enabling threaded cgroup

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Message-ID: <20200115160746.GG2677547@devbig004.ftw2.facebook.com>
Date:   Wed, 15 Jan 2020 08:07:46 -0800
From:   Tejun Heo <tj@...nel.org>
To:     Michal Koutný <mkoutny@...e.com>
Cc:     cgroups@...r.kernel.org, Li Zefan <lizefan@...wei.com>,
        Johannes Weiner <hannes@...xchg.org>,
        linux-kernel@...r.kernel.org,
        Christian Brauner <christian.brauner@...ntu.com>
Subject: Re: [PATCH] cgroup: Prevent double killing of css when enabling
 threaded cgroup

On Thu, Jan 09, 2020 at 04:05:59PM +0100, Michal Koutný wrote:
> The commit prevents these situations by making cgroup_type_write wait
> for all dying csses to go away before re-applying subtree controls.
> When at it, the locations of WARN_ON_ONCE calls are moved so that
> warning is triggered only when we are about to misuse the dying css.

Applied to cgroup/for-5.6.

Thanks.

-- 
tejun