linux-kernel - Re: detecting kernel mem leak

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Message-ID: <Pine.LNX.4.64.0805151036030.18708@schroedinger.engr.sgi.com>
Date:	Thu, 15 May 2008 10:38:28 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Stéphane ANCELOT <sancelot@...e.fr>
cc:	Pekka Enberg <penberg@...helsinki.fi>, linux-kernel@...r.kernel.org
Subject: Re: detecting kernel mem leak

On Tue, 13 May 2008, Stéphane ANCELOT wrote:

> I kept my kernel running with few applications for 5 days , doing
> nothing more than backing up few kb of data on disk and refresh few X apps.
> 
> Ater five days the global memory available go down from 24Mb to 8Mb ...

That is normal. Linux tries to put all memory to use and will free on 
demand.

> The are some signifiant changes in slabinfo but now, I do not know where
> to search ?

Compile the slabinfo tool.

gcc -o slabinfo linux/Documentation/vm/slabinfo.c

Then you can do

slabinfo -T

to get an overview of how much is used by slabs. But I do not see that 
slabs are using an excessive amount. So toying around with slabinfo is 
not going to get you anywhere.