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Message-Id: <201104271352.00601.maxi@daemonizer.de>
Date: Wed, 27 Apr 2011 13:51:59 +0200
From: Maximilian Engelhardt <maxi@...monizer.de>
To: Eric Dumazet <eric.dumazet@...il.com>
Cc: linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
StuStaNet Vorstand <vorstand@...sta.mhn.de>
Subject: Re: Kernel crash after using new Intel NIC (igb)
Hello Eric,
On Wednesday 27 April 2011 06:32:51 Eric Dumazet wrote:
> Le mercredi 27 avril 2011 à 06:24 +0200, Eric Dumazet a écrit :
> > We had similar reports in the past that disappeared when adding
> > "slab_nomerge" to boot parameters. We suspect a memory corruption from
> > another part of kernel on 64bytes kmemcache objects.
> >
> > In 2.6.37, inetpeer code uses 64bytes objects. Using slab_nomerge and
> > SLUB allocator (as you already do), makes sure inetpeer kmemcache wont
> > be shared by other 64bytes objects in kernel.
>
> Of course, the right option name is slub_nomerge
>
> vi +2293 Documentation/kernel-parameters.txt
>
> slub_nomerge [MM, SLUB]
> Disable merging of slabs with similar size. May be
> necessary if there is some reason to distinguish
> allocs to different slabs. Debug options disable
> merging on their own.
> For more information see Documentation/vm/slub.txt.
thank you for this information. I updated the kernel of the affected server to
version 2.6.38.4 yesterday. I'll report when there are still crashes, but it
might take a while, as in the past they only happened within the interval of
weeks to month.
Greetings,
Maxi
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