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

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Message-ID: <alpine.DEB.2.00.1105191059400.9313@router.home>
Date:	Thu, 19 May 2011 11:00:26 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Peter Kruse <pk@...eap.de>
cc:	David Rientjes <rientjes@...gle.com>, eric.dumazet@...il.com,
	linux-kernel@...r.kernel.org
Subject: Re: I have a blaze of 353 page allocation failures, all alike

On Thu, 19 May 2011, Peter Kruse wrote:

> you may remember, we have a server running 2.6.32.29
> and once in a while it just crashes, meaning that
> it just stops responding, and we have to reset it.
> The kernel itself and some processes are still running,
> and it is possible to initiate the sysRQ.
> The mentioned allocation failures are gone after the update
> to the kernel version, but the server crashed again
> after 40 days running without any problem.

Good to hear.
>
> At this time kswapd0/1 started to consume 99% CPU time
> and until the server was reset 8 hours later
> never used less than 50% CPU time.  Shortly after
> that (half an hour) the disk reads dropped down to zero.  And
> a program produced the attached Call Trace.  I also
> attach the process information of kswapd (provided by collectl).

We need the complete system log starting from bootup.

This looks like it has something to do with mutexes and pipes.

View attachment "messages" of type "TEXT/PLAIN" (19680 bytes)

View attachment "kswapd.collectl" of type "TEXT/PLAIN" (4546 bytes)