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

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Message-ID: <AANLkTimnBG1qcLwZoEkr_iDkwE4zygLdjFJHVk9S3+wZ@mail.gmail.com>
Date:	Wed, 1 Sep 2010 12:41:59 +0300
From:	Pekka Enberg <penberg@...nel.org>
To:	Paul Rolland <rol@...917.net>
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...

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
>
> That makes is 10M active "size-32" entries ? but what is that ? What is
> using the "size-32" ? And it this normal to see that on a laptop with 4G
> RAM which is only running X, KDE, Compiz+emerald, +/-10 xterms and a
> firefox which is closed as soon as it is no more used.
>
> Before you ask :
> [root@tux proc]# zgrep SLAB /proc/config.gz
> CONFIG_SLAB=y
> CONFIG_SLABINFO=y
> # CONFIG_DEBUG_SLAB is not set
> [root@tux proc]# uptime
>  11:34:50 up 6 days, 20:30, 13 users,  load average: 1.42, 1.35, 1.23
>
> so that may limit the actions or informations I can collect, but any
> details you want, please feel free to ask.

Might be related to this:

http://kerneltrap.org/mailarchive/linux-kernel/2010/8/25/4611329
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