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Date: Mon, 13 Sep 2004 02:01:43 -0700
From: Andrew Morton <akpm@osdl.org>
To: Krzysztof "Sierota (o2.pl/tlen.pl)" <Krzysztof.Sierota@firma.o2.pl>
Cc: linux-kernel@vger.kernel.org, ext2-devel@lists.sourceforge.net
Subject: Re: [BUG] kernel BUG at fs/jbd/checkpoint.c:646!
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Krzysztof "Sierota (o2.pl/tlen.pl)" <Krzysztof.Sierota@firma.o2.pl> wrote:
>
>  the following bug is present on kernels: 2.6.7-mm6, 2.6.9-rc1-mm1,
>  2.6.8.1-mm3. If any testing would be needed I can trigger it here in the
>  matter of hours.
> 
>  Oops from 2.6.8.1-mm3 attached.
> 
>  Hope that someone will be able to find a solution for this.
> 
>  tia,
>  Krzysztof
> 
> 
> [2.6.8.1-mm3-oo1  text/plain (2745 bytes)]
>  Assertion failure in __journal_drop_transaction() at fs/jbd/checkpoint.c:646: "transaction->t_forget == NULL"

You're using data=journal?  If so, you'd best turn it off.

I'm not able to reproduce this, as usual.  It's on my list of things to ponder.