linux-kernel - Re: 2.6.22-stable causes oomkiller to be invoked

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Message-ID: <20071214182802.GC2576@linux.vnet.ibm.com>
Date:	Fri, 14 Dec 2007 23:58:02 +0530
From:	Dhaval Giani <dhaval@...ux.vnet.ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Tejun Heo <htejun@...il.com>, Greg KH <gregkh@...e.de>,
	stable@...nel.org, lkml <linux-kernel@...r.kernel.org>,
	maneesh@...ux.vnet.ibm.com,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Balbir Singh <balbir@...ibm.com>,
	Gautham Shenoy <ego@...ibm.com>
Subject: Re: 2.6.22-stable causes oomkiller to be invoked

On Fri, Dec 14, 2007 at 09:50:23AM -0800, Andrew Morton wrote:
> On Fri, 14 Dec 2007 21:46:37 +0530 Dhaval Giani <dhaval@...ux.vnet.ibm.com> wrote:
> 
> > On Sat, Dec 15, 2007 at 12:54:09AM +0900, Tejun Heo wrote:
> > > Dhaval Giani wrote:
> > > > XXX sysfs_page_cnt=1
> > > 
> > > Hmm.. so, sysfs r/w buffer wasn't the culprit.  I'm curious what eats up
> > > all your low memory.  Please do the following.
> > > 
> > > 1. Right after boot, record /proc/meminfo and slabinfo.
> > > 
> > > 2. After or near OOM, record /proc/meminfo and slabinfo.  This can be
> > > tricky but if your machine reliably OOMs after 10mins, run it for 9mins
> > > and capturing the result should show enough.
> > > 
> > 
> > Attached. The results are after oom, but i think about a min or so after
> > that. I missed the oom point.
> 
> Looking back at your original oom-killer output: something has consumed all
> your ZONE_NORMAL memory and we cannot tell what it is.
> 
> Please run 2.6.24-rc5-mm1 again (with CONFIG_PAGE_OWNER=y) and take a peek
> at the changelog in
> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.24-rc5/2.6.24-rc5-mm1/broken-out/page-owner-tracking-leak-detector.patch.
> 
> Build up Documentation/page_owner.c then cause the leak to happen then
> execute page_owner.
> 
Hi Andrew

This is a peek during the leak.

-- 
regards,
Dhaval

View attachment "sorted_page_owner.txt" of type "text/plain" (102602 bytes)