linux-kernel - Re: PROBLEM: oops

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Date:	Thu, 27 Aug 2009 09:58:51 +0200 (CEST)
From:	Paweł Gołaszewski <blues@....pl>
To:	Peter Zijlstra <peterz@...radead.org>
cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Dhaval Giani <dhaval.giani@...il.com>
Subject: Re: PROBLEM: oops

On Wed, 26 Aug 2009, Pawel Golaszewski wrote:
> > > > > > could you try to reproduce without that?
> > > > > > 
> > > > > > CONFIG_GROUP_SCHED=n
> > > > > I'll try. 
> > > It seems that problem still exists - system has crashed too. From 
> > > netconsole: Any ideas? Last kernel I was using is 2.6.27.13 - works 
> > > fine. None between 13 and 31 tested...
> > # git log --format=oneline v2.6.27.13..v2.6.27.31 kernel/sched*
> > 2b46f3769896dc04e1e49144d282e4655677105a wait: prevent exclusive waiter starvation
> > 
> > Nothing changed anywhere near the code that is falling apart..
> 
> I have 2 machines with the same hardware and similar software. On one 
> .13 is stable - I will test it on the second one. Should be too.

I've checked it - 2.6.27.13 is stable for me.

Conclusion: there is something wrong between 2.6.27.13 and 2.6.27.31

What can I do about that? I'm not kernel-hacker...

> > Also:
> > 
> > [20621.263297] BUG: unable to handle kernel paging request at ffffffd8
> > [20621.263396] IP: [<c081cc50>] hrtick_start_fair+0x0/0x30
> [...]
> > Suggests something went terribly wrong and corrupted a fundamental 
> > data structure. Maybe turning on each and every debug feature related 
> > to memory debugging might help.

-- 
pozdr.  Paweł Gołaszewski          jid:blues<at>jabber<dot>gda<dot>pl
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