linux-kernel - Re: 2.6.20-rc1-mm1

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Date:	Fri, 15 Dec 2006 13:01:41 -0800
From:	Andrew Morton <akpm@...l.org>
To:	Damien Wyart <damien.wyart@...e.fr>
Cc:	linux-kernel@...r.kernel.org, xfs@....sgi.com,
	xfs-masters@....sgi.com, Jeff Garzik <jeff@...zik.org>,
	Jens Axboe <jens.axboe@...cle.com>
Subject: Re: 2.6.20-rc1-mm1

On Fri, 15 Dec 2006 21:39:36 +0100
Damien Wyart <damien.wyart@...e.fr> wrote:

> With this new kernel, I notice two messages I do not have with
> 2.6.19-rc6-mm2 :
> 
> Dec 15 20:00:47 brouette kernel: Filesystem "sdb9": Disabling barriers,trial barrier write failed
> Dec 15 20:00:47 brouette kernel: Filesystem "sda5": Disabling barriers,trial barrier write failed
> 
> Nothing changed in the config between the two, and going back to
> 2.6.19-rc6-mm2 do not give the messages.

I don't think anything has changed in this area in XFS.  I'd expect that
something got broken in sata, ata_piix or the block core which caused the
"trial barrier write" to start failing.  Various cc's hopefully added.

> Also, I got panics when unmounting reiser4 filesystems with
> 2.6.20-rc1-mm1 but I guess this is related to your waring about reiser4
> being broken in 2.6.19-mm1 (even if it is not listed in notes for
> 2.6.20-rc1-mm1)... I attach dmesg and config, but the reiser4 panics did
> not get logged and I am not able to reboot on 2.6.20-rc1-mm1 right now.
> For the moment, I mainly wanted to report the xfs messages which seems
> a bit suspect.

The reiser4 failure is unexpected.  Could you please see if you can capture
a trae, let the people at reiserfs-dev@...esys.com know?

Thanks.
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