linux-kernel - Re: Out of memory on 3.5 kernels

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Message-ID: <alpine.DEB.2.00.1209192351440.30029@chino.kir.corp.google.com>
Date:	Wed, 19 Sep 2012 23:54:54 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Nico Schottelius <nico-kernel20120920@...ottelius.org>,
	linux-kernel@...r.kernel.org
Subject: Re: Out of memory on 3.5 kernels

On Thu, 20 Sep 2012, Nico Schottelius wrote:

> for some time the slab usage is quite high (~3.2 GiB) and whenever I try
> to do a backup with ccollect (which is using rsync), a lot of processes
> (like chromium) are being killed over night.
> 

Yeah, over 81% of your memory is consumed by slab and that doesn't shrink 
over the duration of the log you posted.  It would be interesting to see 
if there was a leak somewhere: try looking at slabtop and determining if 
you have a cache using an egregious amount of memory; if there aren't any 
clear winners, then we'll still see what is hogging most of your memory 
and see how it compares to 3.4.2.  You can also check if there is a leak 
using kmemleak, but this requires a reboot (see 
Documentation/kmemleak.txt).
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