linux-kernel - Re: Found the commit that causes the OOMs

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Message-ID: <30071.1246290885@redhat.com>
Date:	Mon, 29 Jun 2009 16:54:45 +0100
From:	David Howells <dhowells@...hat.com>
To:	Wu Fengguang <fengguang.wu@...el.com>
Cc:	dhowells@...hat.com, Minchan Kim <minchan.kim@...il.com>,
	Mel Gorman <mel@....ul.ie>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Johannes Weiner <hannes@...xchg.org>,
	"riel@...hat.com" <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Christoph Lameter <cl@...ux-foundation.org>,
	"peterz@...radead.org" <peterz@...radead.org>,
	"tytso@....edu" <tytso@....edu>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"elladan@...imo.com" <elladan@...imo.com>,
	"npiggin@...e.de" <npiggin@...e.de>,
	"Barnes, Jesse" <jesse.barnes@...el.com>, dwmw2@...radead.org
Subject: Re: Found the commit that causes the OOMs

Wu Fengguang <fengguang.wu@...el.com> wrote:

> Yes this time the OOM order/flags are much different from all previous OOMs.
> 
> btw, I found that msgctl11 is pretty good at making a lot of SUnreclaim and
> PageTables pages:

I got David Woodhouse to run this on one of this boxes, but he doesn't see the
problem, I think because he's got 4GB of RAM, and never comes close to running
out.

I've asked him to reboot with mem=1G to see if that helps reproduce it.

David
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