linux-kernel - Re: [tip:sched/urgent] sched/cgroup: Fix/cleanup cgroup teardown/init

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Message-ID: <20160428213609.GU3408@twins.programming.kicks-ass.net>
Date:	Thu, 28 Apr 2016 23:36:09 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, tglx@...utronix.de, mingo@...nel.org,
	tj@...nel.org, hpa@...or.com, k@....jp, niklas.cassel@...s.com,
	torvalds@...ux-foundation.org, linux-tip-commits@...r.kernel.org,
	mjg59@...eos.com
Subject: Re: [tip:sched/urgent] sched/cgroup: Fix/cleanup cgroup teardown/init

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