filesystem corruption in linus tree

[Marc Dietrich <Marc.Dietrich@xxxxxxxxxxxxxxxxxxxxxxxx>]

Hi,

somewhere after the release of 2.6.24 my xfs filesystem got  
corrupted. Initialy I thought it was only related to the readdir bug.  
(http://oss.sgi.com/archives/xfs/2008-02/msg00027.html) So I waited  
for the fix to go into mainline. Yesterday I tried again, but got  
this error during boot:

Feb 23 22:27:00 g3 kernel: Filesystem "sda5": XFS internal error  
xfs_bmapi at line 4757 of file fs/xfs/xfs_bmap.c.  Caller 0xc01199a8
Feb 23 22:27:00 g3 kernel: Call Trace:
Feb 23 22:27:00 g3 kernel: [df84fa20] [c0008260] show_stack 
+0x48/0x19c (unreliable)
Feb 23 22:27:00 g3 kernel: [df84fa60] [c0109c80] xfs_error_report 
+0x58/0x5c
Feb 23 22:27:00 g3 kernel: [df84fa70] [c00f6b04] xfs_bmapi+0x10a4/0x1128
Feb 23 22:27:00 g3 kernel: [df84fbd0] [c01199a8] xfs_iomap+0x13c/0x33c
Feb 23 22:27:00 g3 kernel: [df84fc50] [c01372c4] xfs_map_blocks 
+0x34/0xac
Feb 23 22:27:00 g3 kernel: [df84fc80] [c01384a0]  
xfs_page_state_convert+0x560/0x74c
Feb 23 22:27:00 g3 kernel: [df84fd40] [c01389e0] xfs_vm_writepage 
+0x70/0x11c
Feb 23 22:27:00 g3 kernel: [df84fd70] [c0063e7c] __writepage+0x24/0x8c
Feb 23 22:27:00 g3 kernel: [df84fd80] [c0064c48] write_cache_pages 
+0x284/0x360
Feb 23 22:27:00 g3 kernel: [df84fe20] [c0138930] xfs_vm_writepages 
+0x64/0x78
Feb 23 22:27:00 g3 kernel: [df84fe30] [c0064d98] do_writepages+0x4c/0x84
Feb 23 22:27:00 g3 kernel: [df84fe40] [c00aac48]  
__writeback_single_inode+0xa0/0x3f8
Feb 23 22:27:00 g3 kernel: [df84fea0] [c00ab53c] sync_sb_inodes 
+0x2b4/0x410
Feb 23 22:27:00 g3 kernel: [df84fee0] [c00ab9b4] writeback_inodes 
+0xb8/0x190
Feb 23 22:27:00 g3 kernel: [df84ff00] [c006547c] background_writeout 
+0xc4/0x104
Feb 23 22:27:00 g3 kernel: [df84ff70] [c0065ad8] pdflush+0x178/0x270
Feb 23 22:27:00 g3 kernel: [df84ffd0] [c0042ad8] kthread+0x50/0x88
Feb 23 22:27:00 g3 kernel: [df84fff0] [c00104b8] kernel_thread+0x44/0x60

I seems that the log is corrupted because I can't mount the  
filesystem anymore (blocks while replaying). Mounting with norecovery  
option works. I tried to repair the filesystem, but xfs_repair also  
hangs in "Phase 3 - scan and clear agi unlinks lists". Before, Phase  
2 reports some "ir_freecount/free.mismatch" lines.

This happens on a newly created filesystem with xfsprogs 2.6.9 (I  
also tested 2.5.22). I have a 32bit powermac, so it could be an  
endian issue.

Thanks

Marc