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

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Message-ID: <20081218181249.GD6797@atrey.karlin.mff.cuni.cz>
Date:	Thu, 18 Dec 2008 19:12:49 +0100
From:	Jan Kara <jack@...e.cz>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	Pascal Terjan <pterjan@...driva.com>,
	Andrey Borzenkov <arvidjaar@...l.ru>, pterjan@...driva.org,
	linux-ext4@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Possible ext3 corruption with 1K block size

  Hi Eric,

> Pascal Terjan wrote:
> > Le mercredi 15 octobre 2008 à 09:43 -0500, Eric Sandeen a écrit :
> >> Andrey Borzenkov wrote:
> >>> On Wednesday 15 October 2008, Eric Sandeen wrote:
> >>
> >>>> 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? :)
> >> I did try a 1k-block root fs Fedora install, and didn't see any problems...
> >>
> >>> As indicated by last comment, Pascal has some ways to trigger it; I
> >>> forgot to Cc to him initially; doing it now.
> >> Ok, good deal.
> >>
> > 
> > On my test machine I reproduce it easily : rpm --rebuilddb and if the db
> > is not detected to be corrupted yet it will be after installing a few
> > packages (tested again with 2.6.27).
> > 
> > If I do the rebuilddb on a 2.6.17 and then reboot on a recent kernel,
> > then I can install/uninstall thousands of packages without any
> > corruption.
> 
> so it seems to be the database rebuilding, under a recent kernel, which
> causes the problem?  installing under a recent kernel is ok, as long as
> the db was created on an older kernel?
> 
> Ok that's a good clue...
  Have you been able to track this down? Anything interesting?

								Honza
-- 
Jan Kara <jack@...e.cz>
SuSE CR Labs
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