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

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Message-ID: <48F5E6D4.8080603@redhat.com>
Date:	Wed, 15 Oct 2008 07:49:24 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	Andrey Borzenkov <arvidjaar@...l.ru>
CC:	linux-ext4@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Possible ext3 corruption with 1K block size

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?"  :)

-Eric
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