Date: Fri, 19 Dec 2008 17:29:03 +0900
From: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: "Hugh Dickins" <hugh@veritas.com>,
       "linux-mm@kvack.org" <linux-mm@kvack.org>,
       "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
       "balbir@linux.vnet.ibm.com" <balbir@linux.vnet.ibm.com>,
       "akpm@linux-foundation.org" <akpm@linux-foundation.org>,
       nishimura@mxp.nes.nec.co.jp
Subject: [bug][mmtom] memcg: MEM_CGROUP_ZSTAT underflow
Message-Id: <20081219172903.7ca9b123.nishimura@mxp.nes.nec.co.jp>
Organization: NEC Soft, Ltd.
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 909
Lines: 27

Hi.

Current(I'm testing 2008-12-16-15-50 with some patches, though) memcg have
MEM_CGROUP_ZSTAT underflow problem.

How to reproduce:
- make a directory, set mem.limit.
- run some programs exceeding mem.limit.
- make another directory, and all the tasks in old directory to new one.
- New directory's "inactive_anon" in memory.stat underflows.

>From my investigation:
- This problem seems to happen only when swapping anonymous pages. It seems
  not to happen about shmem.
- After removing memcg-fix-swap-accounting-leak-v3.patch(and of course
  memcg-fix-swap-accounting-leak-doc-fix.patch), this problem doesn't happen.

Thoughts?


Thanks,
Daisuke Nishimura.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/