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

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Message-Id: <1231962169.14825.54.camel@laptop>
Date:	Wed, 14 Jan 2009 20:42:49 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
Cc:	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, 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?

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