Re: Possible XFS Corruption

[Nathan Scott <nathans@sgi.com>]

On Mon, Aug 02, 2004 at 12:20:14PM +0800, Callan Tham wrote:
> On Mon, 2004-08-02 at 13:02, Nathan Scott wrote:
> > > I'm running a Gentoo-patched 2.6.7 kernel, and am experiencing possible
> > > XFS corruption on one of my partitions. I've included a sample of the
> > 
> > Is it reproducible with an unpatched kernel.org kernel?
> > 
> > thanks.
> 
> Hi Nathan,
> 
> Unfortunately, I am unable to test this with a vanilla kernel. However,

Oh?

> looking through the Gentoo patches, they did not touch any of the XFS
> code in a vanilla 2.6.7 kernel.

I would be surprised if they had.  A more likely source of
problems would be changes in the VM subsystem (XFS metadata
buffers are cached in the page cache).

> Is there any other way to diagnose this?

The failure you see is XFS reporting corruption in a directory
btree buffer which didn't have an appropriate magic number at
its start when read in from disk.  There's thousands of potential
reasons why that may have happened;  more often than not these
days its an error thats occured outside of XFS though, and XFS
is passing on the bad news.

If you can find a reproducible test case, you're half way there.
If you can find a reproducible test case on a kernel.org kernel,
you're 95% of the way there, cos then we can more easily help. ;)

cheers.

-- 
Nathan