linux-kernel - Re: [PATCH 0/3] make mapped executable pages the first class citizen

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Date:	Fri, 19 Jun 2009 17:32:24 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Rik van Riel <riel@...hat.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Mel Gorman <mel@....ul.ie>,
	Christoph Lameter <cl@...ux-foundation.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	"hannes@...xchg.org" <hannes@...xchg.org>,
	"tytso@....edu" <tytso@....edu>,
	"elladan@...imo.com" <elladan@...imo.com>,
	"npiggin@...e.de" <npiggin@...e.de>,
	"minchan.kim@...il.com" <minchan.kim@...il.com>,
	"Wang, Roger" <roger.wang@...el.com>
Subject: Re: [PATCH 0/3] make mapped executable pages the first class
	citizen

On Fri, Jun 19, 2009 at 05:04:49PM +0800, Peter Zijlstra wrote:
> On Fri, 2009-06-19 at 17:00 +0800, Wu, Fengguang wrote:
> > [add CC]
> > 
> > This OOM case looks like the same bug encountered by David Howells.
> > 
> > > Jun 18 07:44:53 jbarnes-g45 kernel: [64377.426766] Active_anon:290797 active_file:28 inactive_anon:97034
> > > Jun 18 07:44:53 jbarnes-g45 kernel: [64377.426767]  inactive_file:61 unevictable:11322 dirty:0 writeback:0 unstable:0
> > > Jun 18 07:44:53 jbarnes-g45 kernel: [64377.426768]  free:3341 slab:13776 mapped:5880 pagetables:6851 bounce:0
> > 
> > active/inactive_anon pages take up 4/5 memory.  Are you using TMPFS a lot?
> 
> I suspect its his GEM thingy ;-)

Very likely - GEM allocates drm objects from the internal tmpfs,
and libdrm_intel seems to never free drm objects from its cache.

Thanks,
Fengguang

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