linux-kernel - Re: 2.6.20-rc1-mm1

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Date:	Mon, 18 Dec 2006 08:44:17 +0100
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	Damien Wyart <damien.wyart@...e.fr>, linux-kernel@...r.kernel.org,
	xfs@....sgi.com, xfs-masters@....sgi.com,
	Jeff Garzik <jeff@...zik.org>
Subject: Re: 2.6.20-rc1-mm1

On Fri, Dec 15 2006, Andrew Morton wrote:
> 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.

There hasn't been any barrier changes lately (or block layer handling of
such), so I don't think it's in that area. I'll do some barrier testing
today to verify that things work for me.

-- 
Jens Axboe

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