linux-kernel - Re: OOM killer, page fault

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Message-ID: <20091106133833.GA23151@gamma.logic.tuwien.ac.at>
Date:	Fri, 6 Nov 2009 14:38:33 +0100
From:	Norbert Preining <preining@...ic.at>
To:	Minchan Kim <minchan.kim@...il.com>
Cc:	Jody Belka <jody+lkml@...9.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-kernel@...r.kernel.org, linux-mm <linux-mm@...ck.org>
Subject: Re: OOM killer, page fault

Hi Kim,

On Fr, 06 Nov 2009, preining wrote:
> Recompiling already and trying to recreate the oom-killer boom.

Well, after rebooting into that kernel I get *loads*, every few seconds,
of warnings in the log. Hard to sort out what is real. Is that expected?

Excerpt from the log:
[ 2077.753841] vma->vm_ops->fault : 0xffffffff811df4bd
[ 2077.753842] ------------[ cut here ]------------
[ 2077.753845] WARNING: at mm/memory.c:2722 __do_fault+0x89/0x382()
[ 2077.753847] Hardware name: VGN-Z11VN_B
...
[ 2077.753880] Pid: 4892, comm: Xorg Tainted: G        W  2.6.32-rc6 #5
[ 2077.753881] Call Trace:
[ 2077.753884]  [<ffffffff8108c6cc>] ? __do_fault+0x89/0x382
[ 2077.753887]  [<ffffffff8108c6cc>] ? __do_fault+0x89/0x382
[ 2077.753889]  [<ffffffff8103ae54>] ? warn_slowpath_common+0x77/0xa3
[ 2077.753892]  [<ffffffff8108c6cc>] ? __do_fault+0x89/0x382
[ 2077.753895]  [<ffffffff81341a82>] ? _spin_unlock+0x23/0x2f
[ 2077.753898]  [<ffffffff8108e5d0>] ? handle_mm_fault+0x2b9/0x608
[ 2077.753900]  [<ffffffff810af792>] ? do_vfs_ioctl+0x443/0x47b
[ 2077.753903]  [<ffffffff81026759>] ? do_page_fault+0x25f/0x27b
[ 2077.753906]  [<ffffffff81341e8f>] ? page_fault+0x1f/0x30
[ 2077.753908] ---[ end trace d3324ef5061f0136 ]---

hundreds/thousands of them.

And even without starting anything else. Is that what you want?
My syslog file has grown to some hundred megabytes ...


Best wishes

Norbert

-------------------------------------------------------------------------------
Dr. Norbert Preining                                        Associate Professor
JAIST Japan Advanced Institute of Science and Technology   preining@...st.ac.jp
Vienna University of Technology                               preining@...ic.at
Debian Developer (Debian TeX Task Force)                    preining@...ian.org
gpg DSA: 0x09C5B094      fp: 14DF 2E6C 0307 BE6D AD76  A9C0 D2BF 4AA3 09C5 B094
-------------------------------------------------------------------------------
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