linux-kernel - Re: 2.6.36-rc2 : slabtop report 10170292 size-32 objects...

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Message-ID: <20100901115507.705fe5e4@tux.DEF.witbe.net>
Date:	Wed, 1 Sep 2010 11:55:07 +0200
From:	Paul Rolland <rol@...917.net>
To:	Pekka Enberg <penberg@...nel.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Matt Mackall <mpm@...enic.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Dave Airlie <airlied@...ux.ie>
Subject: Re: 2.6.36-rc2 : slabtop report 10170292 size-32 objects...

Hi Pekka,

On Wed, 1 Sep 2010 12:41:59 +0300
Pekka Enberg <penberg@...nel.org> wrote:

> On Wed, Sep 1, 2010 at 12:35 PM, Paul Rolland <rol@...917.net> wrote:
> > I was surprised to see my machine using so much swap when I couldn't
> > find where all the memory was gone, and I checked quickly what slabtop
> > had to say, and found that one :
> >
> >  OBJS ACTIVE  USE OBJ SIZE  SLABS OBJ/SLAB CACHE SIZE NAME
> > 10172288 10171996  99%    0.03K  90824      112    363296K size-32
> >
> 
> Might be related to this:
> 
> http://kerneltrap.org/mailarchive/linux-kernel/2010/8/25/4611329

Yes, considering that lspci also confirms my machine has some common points 
with Matt's one :

[root@tux Archives]# lspci
...
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)

and

[root@tux Archives]# dmesg | grep drm
[drm] Initialized drm 1.1.0 20060810
[drm] set up 31M of stolen space
fbcon: inteldrmfb (fb0) is primary device
fb0: inteldrmfb frame buffer device
drm: registered panic notifier
[drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
[drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU idle, missed IRQ.
[drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU idle, missed IRQ.
[drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU idle, missed IRQ.
[drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 51
[drm:drm_edid_block_valid] *ERROR* Raw EDID:
[drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU idle, missed IRQ.
[drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU idle, missed IRQ.
[drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU idle, missed IRQ.
[drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU idle, missed IRQ.

Paul
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