Date: Thu, 28 Apr 2016 23:36:09 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de, mingo@kernel.org,
        tj@kernel.org, hpa@zytor.com, k@rhe.jp, niklas.cassel@axis.com,
        torvalds@linux-foundation.org, linux-tip-commits@vger.kernel.org,
        mjg59@coreos.com
Subject: Re: [tip:sched/urgent] sched/cgroup: Fix/cleanup cgroup teardown/init
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 <20160428185137.GA9630@kroah.com>
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On Thu, Apr 28, 2016 at 11:51:37AM -0700, Greg Kroah-Hartman wrote:
> On Thu, Apr 28, 2016 at 08:40:32PM +0200, Peter Zijlstra wrote:
> > 
> > Greg,
> > 
> > It looks like the below patch missed 4.5 and I'm starting to get bug
> > reports that look very much like this issue, could we get this patch
> > lifted into 4.5-stable?
> 
> Sure, also added to 4.4-stable as that is where the bug for this was
> fixed, according to the commit message.

I think this patch relies on the following two cgroup patches:

8bb5ef79bc0f ("cgroup: make sure a parent css isn't freed before its children")
aa226ff4a1ce ("cgroup: make sure a parent css isn't offlined before its children")

which are in 4.5, but I've not checked 4.4-stable