linux-kernel - Re: I have a blaze of 353 page allocation failures, all alike

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Message-ID: <4D5A2EDB.8060603@q-leap.com>
Date:	Tue, 15 Feb 2011 08:44:27 +0100
From:	Peter Kruse <pk@...eap.com>
To:	Christoph Lameter <cl@...ux.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: I have a blaze of 353 page allocation failures, all alike

Hi Christoph,

thanks for your response

Christoph Lameter wrote:
> On Thu, 10 Feb 2011, Peter Kruse wrote:
> 
>> today one of our servers went berserk and produced literally 353
>> page allocation failures in 7 minutes until it was reset
>> (sysrq was still working).  I attach one of them as an example.
>> The failures happened for different processes ranging from
>> sshd, top, java, tclsh, ypserv, smbd, portmap, kswapd to Xvnc4.
>> I already reported about an incidence with this server here:
>> https://lkml.org/lkml/2011/1/19/145
> 
> Atomic allocations are failing there? gfpmask = 0x20?
> 
>> we have set vm.min_free_kbytes = 2097152 but the problem
>> obviously did not go away.
> 
> 2GB of reserves? How much memory does your system have?

48GB

> 
>> Please anybody, what is the cause of these failures?
> 
> Could you post the entire messages from the kernel log? We need the OOM
> info to figure out more about the problem.
> 

I attach one of the call traces, or would it be better if I send the
kern.log (about 6MB)?

Best regards,

   Peter

View attachment "calltrace1" of type "text/plain" (9750 bytes)