linux-ext4 - Re: "Unknown code" error when enabling metadata

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Message-ID: <20120801081744.GA13335@gmail.com>
Date:	Wed, 1 Aug 2012 16:17:44 +0800
From:	Zheng Liu <gnehzuil.liu@...il.com>
To:	Tomasz Chmielewski <mangoo@...g.org>
Cc:	semenko@...detics.net, linux-ext4@...r.kernel.org,
	semenko@...m.mit.edu, tytso@....edu, djwong@...ibm.com
Subject: Re: "Unknown code" error when enabling metadata_csum on ext4 raid1
 device

On Wed, Aug 01, 2012 at 02:51:43PM +0700, Tomasz Chmielewski wrote:
> On 08/01/2012 02:48 PM, Zheng Liu wrote:
> 
> >>didn't try the patch yet, but I've noticed the following in dmesg since 3.5:
> >>
> >>[69004.637293] EXT4-fs warning (device sda1): dx_probe:732: Corrupt dir inode 524293, running e2fsck is recommended.
> >>[69004.637330] EXT4-fs warning (device sda1): dx_probe:647: dx entry: limit != root limit
> >>[69004.637335] EXT4-fs warning (device sda1): dx_probe:732: Corrupt dir inode 524293, running e2fsck is recommended.
> >>[69004.637365] EXT4-fs warning (device sda1): dx_probe:647: dx entry: limit != root limit
> >>[69004.637370] EXT4-fs warning (device sda1): dx_probe:732: Corrupt dir inode 524293, running e2fsck is recommended.
> >>
> >>
> >>Could this be related?
> >
> >Are these messages printed before you enable metadata_csum feature?
> 
> I didn't notice them before trying to enable metadata_csum feature.
> 
> On the other hand, enabling metadata_csum feature was pretty much
> the first thing I've made after booting to 3.5 kernel on this
> system, so it could be it changed something.

Yes, it will change something when you try to enable metadata_csum
feature in tune2fs.  So you'd better to run e2fsck to check your
filesystem IMHO.

> 
> 
> Also, when I do:
> 
> 	dumpe2fs -h /dev/sda1|grep metadata_csum
> 
> I don't see metadata_csum feature anywhere.

You won't see this feature until you can enable this feature successful.

Regards,
Zheng
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