From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Subject: Re: [PATCH] cgroup: Prevent double killing of css when enabling
 threaded cgroup
Date: Wed, 15 Jan 2020 08:07:46 -0800
Message-ID: <20200115160746.GG2677547@devbig004.ftw2.facebook.com>
References: <20191219022716.o7vxxia6o67tyfmf@wittgenstein>
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To: Michal =?iso-8859-1?Q?Koutn=FD?= <mkoutny-IBi9RG/b67k@public.gmane.org>
Cc: cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Li Zefan <lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>, Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Christian Brauner <christian.brauner-GeWIH/nMZzLQT0dZR+AlfA@public.gmane.org>

On Thu, Jan 09, 2020 at 04:05:59PM +0100, Michal Koutn=FD 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.

--=20
tejun