XFS internal error xfs_iformat

[David Greaves <david@xxxxxxxxxxxx>]

Hi

Stock 2.6.6
root filesystem

I get:
Filesystem "hda2": XFS internal error xfs_iformat(6) at line 546 of file 
fs/xfs/xfs_inode.c.  Caller 0xc01df60d
Call Trace:
[<c01dded6>] xfs_iformat+0x106/0x610
[<c01df60d>] xfs_iread+0x21d/0x270
[<c01df60d>] xfs_iread+0x21d/0x270
[<c01dc996>] xfs_iget_core+0xb6/0x4c0
[<c01dceb9>] xfs_iget+0x119/0x150
[<c01f9124>] xfs_dir_lookup_int+0xb4/0x130
[<c01fe9a0>] xfs_lookup+0x50/0x90
[<c020aa57>] linvfs_lookup+0x67/0xa0
[<c01521fb>] real_lookup+0xcb/0xf0
[<c0152466>] do_lookup+0x96/0xb0
[<c015289c>] link_path_walk+0x41c/0x800
[<c0152e99>] path_lookup+0x69/0x110
[<c0153109>] __user_walk+0x49/0x60
[<c014e7dc>] vfs_lstat+0x1c/0x60
[<c014eeeb>] sys_lstat64+0x1b/0x40
[<c0103f0b>] syscall_call+0x7/0xb


oddly it does it at 06:25:31 exactly:
Jun 22 06:25:31 cu kernel: Call Trace:
Jun 22 06:25:31 cu kernel:  [xfs_iformat+262/1552] xfs_iformat+0x106/0x610

Jun 23 06:25:31 cu kernel: Call Trace:
Jun 23 06:25:31 cu kernel:  [xfs_iformat+262/1552] xfs_iformat+0x106/0x610

Jun 24 06:25:31 cu kernel: Call Trace:
Jun 24 06:25:31 cu kernel:  [xfs_iformat+262/1552] xfs_iformat+0x106/0x610

Jun 25 06:25:31 cu kernel: Call Trace:
Jun 25 06:25:31 cu kernel:  [xfs_iformat+262/1552] xfs_iformat+0x106/0x610

Jun 26 06:25:31 cu kernel: Call Trace:
Jun 26 06:25:31 cu kernel:  [xfs_iformat+262/1552] xfs_iformat+0x106/0x610


I have no cronjobs etc - looking at the rest of the network though.
Earlier logs show no activity at this time give or take 10s of seconds.

David