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

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On Thu, Aug 10, 2006 at 01:31:35PM +0200, Jesper Juhl wrote:
> On 08/08/06, Nathan Scott <[email protected]> wrote:
> ...
> Ok, I booted the server with 2.6.18-rc4 + your patch. Things went well
> for ~3 hours and then blew up - not in the same way though.
> 
> The machine was under pretty heavy load recieving data via rsync when
> the following happened :
> 
> Filesystem "dm-51": XFS internal error xfs_trans_cancel at line 1138
> of file fs/xfs/xfs_trans.c.  Caller 0xc0210e3f
>  [<c0103a3c>] show_trace_log_lvl+0x152/0x165
>  [<c0103a5e>] show_trace+0xf/0x13
>  [<c0103b59>] dump_stack+0x15/0x19
>  [<c0213474>] xfs_trans_cancel+0xcf/0xf8
>  [<c0210e3f>] xfs_rename+0x64d/0x936
>  [<c0226286>] xfs_vn_rename+0x48/0x9f
>  [<c016584e>] vfs_rename_other+0x99/0xcb
>  [<c0165a36>] vfs_rename+0x1b6/0x1eb
>  [<c0165bda>] do_rename+0x16f/0x193
>  [<c0165c45>] sys_renameat+0x47/0x73

Thanks Jesper.  Hmm, lessee - this is a cancelled dirty rename
transaction ... could be ondisk dir2 corruption (any chance this
filesystem was affected by 2.6.17's endian bug?), or something
else entirely.  No I/O errors in the system log earlier or anything
like that?

> I was doing an lvmextend +xfs_resize of a different (XFS) filesystem
> on the same server at roughly the same time. But I'm not sure if
> that's related.

That wont be related, no.

> I'm currently running xfs_repair on the fs that blew up.

OK, I'd be interested to see if that reported any directory (or
other) issues.

cheers.

-- 
Nathan
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