Re: btrfs io errors on 3.4rc1

From: Dave Jones
Date: Mon Apr 02 2012 - 18:51:36 EST


On Mon, Apr 02, 2012 at 06:39:19PM -0400, Chris Mason wrote:
> On Mon, Apr 02, 2012 at 06:33:50PM -0400, Dave Jones wrote:
> > On Mon, Apr 02, 2012 at 06:28:02PM -0400, Chris Mason wrote:
> >
> > > > x86-64.
> > > >
> > > > dmesg below. (ignore the rpc oops, reported elsewhere, it's unrelated)
> > >
> > > Well, there really are no btrfs messages in there at all. Do you have
> > > free space for a clean copy of the btrfs partition? Trying to figure
> > > out if you have a stale corruption (on two boxes seems really unlikely).
> > > I definitely can't reproduce it here.
> >
> > Don't really have any free space for it (It's the / partition on both)
> >
> > Is there a wip btrfs.fsck yet ? One of the machines is just a scratch testbox,
> > so I'm happy to run it even if it'll potentially make things worse.
>
> The current btrfsck repair mode will fix problems in the extent
> allocation tree, but that probably isn't what you're seeing. I'd just
> run it read only and see if it finds any problems.
>
> (You'll need the FS completely unmounted though).

I'll start a bisect later to see if I can narrow it down at least.

Dave

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