linux-kernel - Re: [BUG] kernel BUG at mm/memcontrol.c:1074!

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Date:	Wed, 18 Jan 2012 19:41:44 -0800 (PST)
From:	Hugh Dickins <hughd@...gle.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
cc:	Sasha Levin <levinsasha928@...il.com>, hannes <hannes@...xchg.org>,
	mhocko@...e.cz, bsingharora@...il.com,
	Dave Jones <davej@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	cgroups@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [BUG] kernel BUG at mm/memcontrol.c:1074!

On Thu, 19 Jan 2012, KAMEZAWA Hiroyuki wrote:
> On Thu, 19 Jan 2012 07:10:26 +0200
> Sasha Levin <levinsasha928@...il.com> wrote:
> 
> > Hi all,
> > 
> > During testing, I have triggered the OOM killer by mmap()ing a large block of memory. The OOM kicked in and tried to kill the process:
> > 
> 
> two questions.
> 
> 1. What is the kernel version  ?

It says 3.2.0-next-20120119-sasha #128

> 2. are you using memcg moutned ?

I notice that, unlike Linus's git, this linux-next still has
mm-isolate-pages-for-immediate-reclaim-on-their-own-lru.patch in.

I think that was well capable of oopsing in mem_cgroup_lru_del_list(),
since it didn't always know which lru a page belongs to.

I'm going to be optimistic and assume that was the cause.

Hugh
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