linux-ext4 - Re: Possible ext3 corruption with 1K block size

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Message-Id: <200810151824.36119.arvidjaar@mail.ru>
Date:	Wed, 15 Oct 2008 18:24:31 +0400
From:	Andrey Borzenkov <arvidjaar@...l.ru>
To:	Eric Sandeen <sandeen@...hat.com>, pterjan@...driva.org
Cc:	linux-ext4@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Possible ext3 corruption with 1K block size

On Wednesday 15 October 2008, Eric Sandeen wrote:
> Andrey Borzenkov wrote:
> > There is long standing open bug report on Mandriva which is currently
> > beieved to have root cause in file system corruption. It shows itself
> > in RPM DB corruption (at least, there is no other known method to trigger
> > it). So far all reported cases happened on filesystem with 1K block size
> > and stopped when RPM DB was moved to FS with 4K block size.
> > 
> > There are also similar RH reports as well.
> > 
> > Here are references:
> > 
> > https://qa.mandriva.com/show_bug.cgi?id=32547
> > 
> > This one is rather long. 
> 
> yep, unfortunately IIRC most of the bug is "me too's" and "how do I do
> the workaround" :)
> 
> > Interesting bits are probably around
> > 
> > https://qa.mandriva.com/show_bug.cgi?id=32547#c177
> > https://qa.mandriva.com/show_bug.cgi?id=32547#c148 (many users reporting
> > dumpe2fs)
> > 
> > https://bugzilla.redhat.com/show_bug.cgi?id=230362
> > https://bugzilla.redhat.com/show_bug.cgi?id=375931
> > https://bugzilla.redhat.com/show_bug.cgi?id=305301
> > 
> > The Mandriva bugzilla also mentions this mail from Stephen Tweedie 
> > http://lkml.org/lkml/2007/9/18/232
> 
> I don't think this is related, in the end... there was some possiblity
> of corruption from that, but I think it's doubtful it'd hit 1k block
> filesystems more, and in any case, the corruption has been seen since
> then if I read it right.
> 
> > which indicates some issues with 1K blocks, but according to last comment:
> > https://qa.mandriva.com/show_bug.cgi?id=32547#c300
> > 
> > it is still present in 2.6.27 (at least was present on -rc6)
> > 
> > There was a kernel bug report http://bugzilla.kernel.org/show_bug.cgi?id=11564,
> > but in this case it was identified as hardware issue.
> 
> My kingdom for a testcase... does anyone have simple steps to reproduce
> this?  Or do they all start with "install mandriva on a 1k block size
> system?"  :)
> 

May be RH will do? :)

As indicated by last comment, Pascal has some ways to trigger it; I
forgot to Cc to him initially; doing it now.

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