Re: 2.6.18-rc3-git3 - XFS - BUG: unable to handle kernel NULL pointer dereference at virtual address 00000078

[Nathan Scott <nathans@sgi.com>]

On Wed, Aug 16, 2006 at 12:38:10PM +0000, Paul Slootman wrote:
> Nathan Scott  <nathans@sgi.com> wrote:
> >On Fri, Aug 11, 2006 at 12:25:03PM +0200, Jesper Juhl wrote:
> >> I didn't capture all of the xfs_repair output, but I did get this :
> >> ...
> >> Phase 4 - check for duplicate blocks...
> >>         - setting up duplicate extent list...
> >>         - clear lost+found (if it exists) ...
> >>         - clearing existing "lost+found" inode
> >>         - deleting existing "lost+found" entry
> >>         - check for inodes claiming duplicate blocks...
> >>         - agno = 0
> >>         - agno = 1
> >>         - agno = 2
> >>         - agno = 3
> >>         - agno = 4
> >>         - agno = 5
> >>         - agno = 6
> >> LEAFN node level is 1 inode 412035424 bno = 8388608
> >
> >Ooh.  Can you describe this test case you're using?  Something with
> >a bunch of renames in it, obviously, but I'd also like to be able to
> >reproduce locally with the exact data set (file names in particular),
> >if at all possible.
> 
> >From your reaction above I gather that "LEAFN node level is 1 inode ..."
> is a bad thing?
> 
> My filesystem (that crashes under heavy load, while rsyncing to and from
> it) has a lot of these messages when xfs_repair is run.

Do you have a reproducible test case?  Please send a go-to-woe recipe
so I can see the problem first hand... and preferably one that is, er,
slightly simpler than Jesper's case.

thanks.

-- 
Nathan