linux-ext4 - Re: kernel BUG at fs/ext/super.c:428

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Message-ID: <20090114194838.GB18436@linux-os.sc.intel.com>
Date:	Wed, 14 Jan 2009 11:48:39 -0800
From:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	Theodore Tso <tytso@....edu>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Nick Piggin <nickpiggin@...oo.com.au>
Subject: Re: kernel BUG at fs/ext/super.c:428

On Wed, Jan 14, 2009 at 11:42:49AM -0800, Peter Zijlstra wrote:
> On Wed, 2009-01-14 at 11:38 -0800, Pallipadi, Venkatesh wrote:
> 
> > > > Below is the result of full bisect
> 
> > > >     futex: rely on get_user_pages() for shared futexes
> 
> > > However does a futex change make ext3 crap its pants?
> > > 
> > > Is there anything more to it than start the machine, and reboot?
> > 
> > Just system startup and reboot is enough to reproduce the problem. And 100%
> > reproducible. So, does seem to be any timing involved either.
> 
> That's very odd indeed, non of my test systems nor Ingo's ever triggered
> this, and that patch has been in -tip for a rather long time.
> 
> CommitDate: Tue Sep 30 12:35:20 2008 +0200
> 
> That's 3.5 months of test time.. most curious. What kind of userland do
> you have that triggers this?
> 

This is a Core 2 (X5460) DP server system with SuSE SLES 10 installation.
I have 3 ext3 partitions mounted; root, home and my own masterboot that I use to
switch between different OS installations.

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