linux-ext4 - Re: e2fsck: unknown feature flag in journal superblock

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Date:	Thu, 29 May 2008 16:03:05 -0400
From:	Theodore Tso <tytso@....edu>
To:	Valerie Clement <valerie.clement@...l.net>
Cc:	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: e2fsck: unknown feature flag in journal superblock

On Thu, May 29, 2008 at 04:47:30PM +0200, Valerie Clement wrote:
> Hi Ted,
>
> I don't know if you are aware of this, when running e2fsck on an ext4 
> filesystem which was mounted with "journal_async_commit" option, the 
> following error is reported:
>
> e2fsck 1.41-WIP (27-Apr-2008)
> Ext3 journal superblock has an unknown incompatible feature flag set.
> Abort<y>?
>
> Seen with e2fsck from the latest next branch (1.41-WIP)

Support for the async journal flag is in the pu branch.  See recent
discussions on the linux-ext4 list.  There is some disagreement about
what is the right way to handle checksum failures, and what is
currently in the kernel is definitely buggy.

						- Ted
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