From: Tejun Heo <tj@kernel.org>
To: "Michal Koutný" <mkoutny@suse.com>
Cc: cgroups@vger.kernel.org, Li Zefan <lizefan@huawei.com>,
Johannes Weiner <hannes@cmpxchg.org>,
linux-kernel@vger.kernel.org,
Christian Brauner <christian.brauner@ubuntu.com>
Subject: Re: [PATCH] cgroup: Prevent double killing of css when enabling threaded cgroup
Date: Wed, 15 Jan 2020 08:07:46 -0800 [thread overview]
Message-ID: <20200115160746.GG2677547@devbig004.ftw2.facebook.com> (raw)
In-Reply-To: <20200109150559.14457-1-mkoutny@suse.com>
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
prev parent reply other threads:[~2020-01-15 16:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-19 2:27 cgroups: WARN_ON_ONCE(css && percpu_ref_is_dying(&css->refcnt)) triggerable running stress tests cgroups Christian Brauner
2020-01-09 15:05 ` [PATCH] cgroup: Prevent double killing of css when enabling threaded cgroup Michal Koutný
2020-01-15 16:07 ` Tejun Heo [this message]
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