linux-kernel - Re: [patch 1/2] mm, memcg: avoid oom notification when current needs access to memory reserves

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Message-ID: <alpine.DEB.2.02.1401202155410.21729@chino.kir.corp.google.com>
Date:	Mon, 20 Jan 2014 21:58:28 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Michal Hocko <mhocko@...e.cz>
cc:	Johannes Weiner <hannes@...xchg.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	cgroups@...r.kernel.org,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Greg Kroah-Hartmann <gregkh@...uxfoundation.org>
Subject: Re: [patch 1/2] mm, memcg: avoid oom notification when current needs
 access to memory reserves

On Thu, 16 Jan 2014, Michal Hocko wrote:

> > This is concerning because it's merged in -mm without being tested by Eric 
> > and is marked for stable while violating the stable kernel rules criteria.
> 
> Are you questioning the patch fixes the described issue?
> 
> Please note that the exit_robust_list and PF_EXITING as a culprit has
> been identified by Eric. Of course I would prefer if it was tested by
> anybody who can reproduce it.

You're saying the patch hasn't been tested by anybody and that clearly 
violates the first rule in Documentation/stable_kernel_rules.txt:

 - It must be obviously correct and tested.

Adding Greg to the cc if this should be clarified further.  The patches 
getting proposed through -mm for stable boggles my mind sometimes.
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