linux-ext4 - Re: Bug#615998: linux-image-2.6.32-5-xen-amd64: Repeatable "kernel BUG at fs/jbd2/commit.c:534" from Postfix on ext4

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Message-ID: <1309269520.3093.1574.camel@localhost>
Date:	Tue, 28 Jun 2011 14:58:40 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Jan Kara <jack@...e.cz>, 615998@...s.debian.org
Cc:	"Moffett, Kyle D" <Kyle.D.Moffett@...ing.com>,
	Ted Ts'o <tytso@....edu>, Lukas Czerner <lczerner@...hat.com>,
	Sean Ryle <seanbo@...il.com>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	Sachin Sant <sachinp@...ibm.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Subject: Re: Bug#615998: linux-image-2.6.32-5-xen-amd64: Repeatable "kernel
 BUG at fs/jbd2/commit.c:534" from Postfix on ext4

On Tue, 2011-06-28 at 11:36 +0200, Jan Kara wrote:
> On Mon 27-06-11 23:21:17, Moffett, Kyle D wrote:
[...]
> > Please correct me if this is horribly horribly wrong:
> > 
> > no journal:
> >   Nothing is journalled
> >   + Very fast.
> >   + Works well for filesystems that are "mkfs"ed on every boot
> >   - Have to fsck after every reboot
> Fsck is needed only after a crash / hard powerdown. Otherwise completely
> correct. Plus you always have a possibility of exposing uninitialized
> (potentially sensitive) data after a fsck.
> 
> Actually, normal desktop might be quite happy with non-journaled filesystem
> when fsck is fask enough.
[...]

With no journal, there is a fair risk that fsck cannot recover the
filesystem automatically (let alone the actual data).  And normal users
should never have to suffer questions from fsck.

Ben.

-- 
Ben Hutchings
In a hierarchy, every employee tends to rise to his level of incompetence.

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