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Date: Wed, 13 Feb 2013 08:31:37 -0500
From: Chris Mason <chris.mason@fusionio.com>
To: "Richard W.M. Jones" <rjones@redhat.com>
CC: Chris Mason <clmason@fusionio.com>, Josef Bacik <JBacik@fusionio.com>,
        "linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>
Subject: Re: What can I do to make btrfs work?
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On Wed, Feb 13, 2013 at 06:10:44AM -0700, Richard W.M. Jones wrote:
> On Wed, Feb 13, 2013 at 11:00:33AM +0000, Richard W.M. Jones wrote:
> > Will try the btrfsprogs patch next.
> 
> I applied this patch:
> 
> https://git.kernel.org/?p=linux/kernel/git/mason/btrfs-progs.git;a=commitdiff_plain;h=8fe354744cd7b5c4f7a3314dcdbb5095192a032f
> 
> to the version of btrfs-progs in Fedora Rawhide (currently
> "0.20.rc1.20121017git91d9eec").  Then I ran the simple reproducer, and
> the full libguestfs test suite on two machines.
> 
> This does appear to fix the problem for me, but only on Rawhide.
> 
> On Fedora 18 which has an older kernel, the patch does not fix the
> problem (same errors as before).
> 
> Rawhide kernel: kernel-3.8.0-0.rc7.git0.1.fc19.x86_64
> 
> Fedora 18 kernel: kernel-3.7.6-201.fc18.x86_64
> 
> Anyway, it's an improvement so I'll make sure the patch is added to
> the Rawhide btrfs-progs package.

Ok, the patch is more of a bandaid, but between running my vtest program
and the patch helping, we're clearly not clearing caches properly
(somehow).  I'll take another stab at fixing this on the kernel side.

-chris