XFS: lockdep warning: BUG: held lock freed!

[Luca <kronos.it@gmail.com>]

Hi,
I see that this error has alredy been observed with 2.6.17-mm; I'm
running kernel 2.6.18-rc5 (x86, UP, with PREEMPT) and may have
additional information. In my case the FS was affected by 2.6.17
directory corruption (I forgot to run xfs_repair on this machine); after
the FS was shut down I rebooted the machine (with init=/bin/bash, rootfs
on ext2, so it was not affected) and mounted XFS partition read-only to
recover the log.
I tried to reproduce with "simple" crashes (i.e. write a file and
reboot, I don't want to trash the FS too much ;)) without success, so
the error may be related to directory corruption.

lockdep message:

SGI XFS with no debug enabled
XFS mounting filesystem hda8
Starting XFS recovery on filesystem: hda8 (logdev: internal)

=========================
[ BUG: held lock freed! ]
-------------------------
mount/290 is freeing memory ef798b70-ef798baf, with a lock still held there!
 (&(&ip->i_lock)->mr_lock){--..}, at: [<f193e4ed>] xfs_ilock+0x7d/0xb0 [xfs]
3 locks held by mount/290:
 #0:  (&type->s_umount_key#14){--..}, at: [<b01689cc>] sget+0x19c/0x320
 #1:  (&(&ip->i_iolock)->mr_lock){--..}, at: [<f193e50e>] xfs_ilock+0x9e/0xb0 [xfs]
 #2:  (&(&ip->i_lock)->mr_lock){--..}, at: [<f193e4ed>] xfs_ilock+0x7d/0xb0 [xfs]

stack backtrace:
 [<b0104376>] show_trace_log_lvl+0x176/0x1a0
 [<b0104a32>] show_trace+0x12/0x20
 [<b0104a99>] dump_stack+0x19/0x20
 [<b0135699>] debug_check_no_locks_freed+0x169/0x180
 [<b01d5c71>] __init_rwsem+0x21/0x60
 [<f193e855>] xfs_inode_lock_init+0x25/0x80 [xfs]
 [<f193ee4a>] xfs_iget+0x18a/0x5b8 [xfs]
 [<f194f0d6>] xlog_recover_process_iunlinks+0x316/0x500 [xfs]
 [<f194f57e>] xlog_recover_finish+0x2be/0x380 [xfs]
 [<f194af47>] xfs_log_mount_finish+0x37/0x50 [xfs]
 [<f1953b70>] xfs_mountfs+0xe50/0x1020 [xfs]
 [<f1945579>] xfs_ioinit+0x29/0x40 [xfs]
 [<f195af8c>] xfs_mount+0x65c/0xa10 [xfs]
 [<f196d855>] vfs_mount+0x25/0x30 [xfs]
 [<f196d676>] xfs_fs_fill_super+0x76/0x1e0 [xfs]
 [<b01692bc>] get_sb_bdev+0xec/0x130
 [<f196c7f1>] xfs_fs_get_sb+0x21/0x30 [xfs]
 [<b0168dc0>] vfs_kern_mount+0x40/0xa0
 [<b0168e76>] do_kern_mount+0x36/0x50
 [<b017f2ee>] do_mount+0x22e/0x610
 [<b017f73f>] sys_mount+0x6f/0xb0
 [<b0103173>] syscall_call+0x7/0xb
 [<a7ef00be>] 0xa7ef00be
 [<b0104a32>] show_trace+0x12/0x20
 [<b0104a99>] dump_stack+0x19/0x20
 [<b0135699>] debug_check_no_locks_freed+0x169/0x180
 [<b01d5c71>] __init_rwsem+0x21/0x60
 [<f193e855>] xfs_inode_lock_init+0x25/0x80 [xfs]
 [<f193ee4a>] xfs_iget+0x18a/0x5b8 [xfs]
 [<f194f0d6>] xlog_recover_process_iunlinks+0x316/0x500 [xfs]
 [<f194f57e>] xlog_recover_finish+0x2be/0x380 [xfs]
 [<f194af47>] xfs_log_mount_finish+0x37/0x50 [xfs]
 [<f1953b70>] xfs_mountfs+0xe50/0x1020 [xfs]
 [<f1945579>] xfs_ioinit+0x29/0x40 [xfs]
 [<f195af8c>] xfs_mount+0x65c/0xa10 [xfs]
 [<f196d855>] vfs_mount+0x25/0x30 [xfs]
 [<f196d676>] xfs_fs_fill_super+0x76/0x1e0 [xfs]
 [<b01692bc>] get_sb_bdev+0xec/0x130
 [<f196c7f1>] xfs_fs_get_sb+0x21/0x30 [xfs]
 [<b0168dc0>] vfs_kern_mount+0x40/0xa0
 [<b0168e76>] do_kern_mount+0x36/0x50
 [<b017f2ee>] do_mount+0x22e/0x610
 [<b017f73f>] sys_mount+0x6f/0xb0
 [<b0103173>] syscall_call+0x7/0xb
Ending XFS recovery on filesystem: hda8 (logdev: internal)


Luca
-- 
Home: http://kronoz.cjb.net
Runtime error 6D at f000:a12f : user incompetente
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