=======================================================
[ INFO: possible circular locking dependency detected ]
2.6.18-1.2200_selfsmp #1
-------------------------------------------------------
init/1 is trying to acquire lock:
(&bdev_part_lock_key){--..}, at: [<c0476e89>] bd_claim_by_disk+0x5d/0x166
but task is already holding lock:
(&new->reconfig_mutex){--..}, at: [<c05ced5c>] autorun_devices+0x128/0x2b4
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&new->reconfig_mutex){--..}:
[<c0435e4e>] add_lock_to_list+0x5e/0x79
[<c0437fa6>] __lock_acquire+0x91c/0x9fd
[<c05d27bf>] md_open+0x22/0x53
[<c0438040>] __lock_acquire+0x9b6/0x9fd
[<c04383cf>] lock_acquire+0x6d/0x8a
[<c05d27bf>] md_open+0x22/0x53
[<c063b74e>] __mutex_lock_interruptible_slowpath+0xde/0x286
[<c05d27bf>] md_open+0x22/0x53
[<c063bc57>] __mutex_lock_slowpath+0x22a/0x232
[<c05d27bf>] md_open+0x22/0x53
[<c047733a>] do_open+0x85/0x2e2
[<c04776ee>] blkdev_open+0x0/0x42
[<c0477708>] blkdev_open+0x1a/0x42
[<c046eb4a>] __dentry_open+0xc7/0x1ab
[<c046eca8>] nameidata_to_filp+0x24/0x33
[<c046ece9>] do_filp_open+0x32/0x39
[<c063cd63>] _spin_unlock+0x14/0x1c
[<c046ea79>] get_unused_fd+0xb9/0xc3
[<c046ed32>] do_sys_open+0x42/0xbe
[<c046ede7>] sys_open+0x1c/0x1e
[<c0403f73>] syscall_call+0x7/0xb
[<ffffffff>] 0xffffffff
-> #1 (&bdev->bd_mutex){--..}:
[<c0435e4e>] add_lock_to_list+0x5e/0x79
[<c0437fa6>] __lock_acquire+0x91c/0x9fd
[<c047730d>] do_open+0x58/0x2e2
[<c063ba1f>] __mutex_unlock_slowpath+0x10a/0x113
[<c0436f6c>] mark_held_locks+0x46/0x62
[<c04383cf>] lock_acquire+0x6d/0x8a
[<c047730d>] do_open+0x58/0x2e2
[<c063bb0b>] __mutex_lock_slowpath+0xde/0x232
[<c047730d>] do_open+0x58/0x2e2
[<c0577c4d>] kobj_lookup+0x10d/0x168
[<c047730d>] do_open+0x58/0x2e2
[<c04775ea>] blkdev_get+0x53/0x5e
[<c04773b2>] do_open+0xfd/0x2e2
[<c04775ea>] blkdev_get+0x53/0x5e
[<c047782c>] open_by_devnum+0x2d/0x38
[<c05ccd53>] md_import_device+0x229/0x247
[<c04db768>] task_has_capability+0x56/0x5e
[<c0420c61>] printk+0x1f/0xaf
[<c05d14b7>] md_ioctl+0xbe/0x13a4
[<c0430620>] __kernel_text_address+0x18/0x23
[<c040516c>] dump_trace+0x87/0x91
[<c0430620>] __kernel_text_address+0x18/0x23
[<c040516c>] dump_trace+0x87/0x91
[<c0430620>] __kernel_text_address+0x18/0x23
[<c040516c>] dump_trace+0x87/0x91
[<c0436a55>] find_usage_backwards+0x64/0x88
[<c0436a55>] find_usage_backwards+0x64/0x88
[<c0436a92>] check_usage_backwards+0x19/0x41
[<c05d27bf>] md_open+0x22/0x53
[<c0436eaa>] mark_lock+0x324/0x3a0
[<c04f6395>] blkdev_driver_ioctl+0x4e/0x5e
[<c04f69f1>] blkdev_ioctl+0x64c/0x69b
[<c04370ab>] trace_hardirqs_on+0x123/0x14d
[<c04dafe9>] avc_has_perm+0x4e/0x58
[<c04db64d>] inode_has_perm+0x5b/0x63
[<c0438040>] __lock_acquire+0x9b6/0x9fd
[<c047fbd0>] set_close_on_exec+0x24/0x41
[<c046e994>] fd_install+0x24/0x50
[<c04db6e1>] file_has_perm+0x8c/0x94
[<c0476b6d>] block_ioctl+0x18/0x1b
[<c0476b55>] block_ioctl+0x0/0x1b
[<c04801d7>] do_ioctl+0x1f/0x62
[<c0480464>] vfs_ioctl+0x24a/0x25c
[<c04804c2>] sys_ioctl+0x4c/0x66
[<c0403f73>] syscall_call+0x7/0xb
[<ffffffff>] 0xffffffff
-> #0 (&bdev_part_lock_key){--..}:
[<c0437eb4>] __lock_acquire+0x82a/0x9fd
[<c0476e89>] bd_claim_by_disk+0x5d/0x166
[<c046b65d>] cache_alloc_debugcheck_after+0xc4/0x13a
[<c04383cf>] lock_acquire+0x6d/0x8a
[<c0476e89>] bd_claim_by_disk+0x5d/0x166
[<c063bb0b>] __mutex_lock_slowpath+0xde/0x232
[<c0476e89>] bd_claim_by_disk+0x5d/0x166
[<c0476e89>] bd_claim_by_disk+0x5d/0x166
[<c05ccf76>] bind_rdev_to_array+0x205/0x223
[<c04370ab>] trace_hardirqs_on+0x123/0x14d
[<c05ced5c>] autorun_devices+0x128/0x2b4
[<c05cee0a>] autorun_devices+0x1d6/0x2b4
[<c0420c61>] printk+0x1f/0xaf
[<c05d1518>] md_ioctl+0x11f/0x13a4
[<c0430620>] __kernel_text_address+0x18/0x23
[<c040516c>] dump_trace+0x87/0x91
[<c0430620>] __kernel_text_address+0x18/0x23
[<c040516c>] dump_trace+0x87/0x91
[<c0430620>] __kernel_text_address+0x18/0x23
[<c040516c>] dump_trace+0x87/0x91
[<c0436a55>] find_usage_backwards+0x64/0x88
[<c0436a55>] find_usage_backwards+0x64/0x88
[<c0436a92>] check_usage_backwards+0x19/0x41
[<c05d27bf>] md_open+0x22/0x53
[<c0436eaa>] mark_lock+0x324/0x3a0
[<c04f6395>] blkdev_driver_ioctl+0x4e/0x5e
[<c04f69f1>] blkdev_ioctl+0x64c/0x69b
[<c04370ab>] trace_hardirqs_on+0x123/0x14d
[<c04dafe9>] avc_has_perm+0x4e/0x58
[<c04db64d>] inode_has_perm+0x5b/0x63
[<c0438040>] __lock_acquire+0x9b6/0x9fd
[<c047fbd0>] set_close_on_exec+0x24/0x41
[<c046e994>] fd_install+0x24/0x50
[<c04db6e1>] file_has_perm+0x8c/0x94
[<c0476b6d>] block_ioctl+0x18/0x1b
[<c0476b55>] block_ioctl+0x0/0x1b
[<c04801d7>] do_ioctl+0x1f/0x62
[<c0480464>] vfs_ioctl+0x24a/0x25c
[<c04804c2>] sys_ioctl+0x4c/0x66
[<c0403f73>] syscall_call+0x7/0xb
[<ffffffff>] 0xffffffff
other info that might help us debug this:
1 lock held by init/1:
#0: (&new->reconfig_mutex){--..}, at: [<c05ced5c>] autorun_devices+0x128/0x2b4
stack backtrace:
[<c0437682>] print_circular_bug_tail+0x5d/0x65
[<c0437eb4>] __lock_acquire+0x82a/0x9fd
[<c0476e89>] bd_claim_by_disk+0x5d/0x166
[<c046b65d>] cache_alloc_debugcheck_after+0xc4/0x13a
[<c04383cf>] lock_acquire+0x6d/0x8a
[<c0476e89>] bd_claim_by_disk+0x5d/0x166
[<c063bb0b>] __mutex_lock_slowpath+0xde/0x232
[<c0476e89>] bd_claim_by_disk+0x5d/0x166
[<c0476e89>] bd_claim_by_disk+0x5d/0x166
[<c05ccf76>] bind_rdev_to_array+0x205/0x223
[<c04370ab>] trace_hardirqs_on+0x123/0x14d
[<c05ced5c>] autorun_devices+0x128/0x2b4
[<c05cee0a>] autorun_devices+0x1d6/0x2b4
[<c0420c61>] printk+0x1f/0xaf
[<c05d1518>] md_ioctl+0x11f/0x13a4
[<c0430620>] __kernel_text_address+0x18/0x23
[<c040516c>] dump_trace+0x87/0x91
[<c0430620>] __kernel_text_address+0x18/0x23
[<c040516c>] dump_trace+0x87/0x91
[<c0430620>] __kernel_text_address+0x18/0x23
[<c040516c>] dump_trace+0x87/0x91
[<c0436a55>] find_usage_backwards+0x64/0x88
[<c0436a55>] find_usage_backwards+0x64/0x88
[<c0436a92>] check_usage_backwards+0x19/0x41
[<c05d27bf>] md_open+0x22/0x53
[<c0436eaa>] mark_lock+0x324/0x3a0
[<c04f6395>] blkdev_driver_ioctl+0x4e/0x5e
[<c04f69f1>] blkdev_ioctl+0x64c/0x69b
[<c04370ab>] trace_hardirqs_on+0x123/0x14d
[<c04dafe9>] avc_has_perm+0x4e/0x58
[<c04db64d>] inode_has_perm+0x5b/0x63
[<c0438040>] __lock_acquire+0x9b6/0x9fd
[<c047fbd0>] set_close_on_exec+0x24/0x41
[<c046e994>] fd_install+0x24/0x50
[<c04db6e1>] file_has_perm+0x8c/0x94
[<c0476b6d>] block_ioctl+0x18/0x1b
[<c0476b55>] block_ioctl+0x0/0x1b
[<c04801d7>] do_ioctl+0x1f/0x62
[<c0480464>] vfs_ioctl+0x24a/0x25c
[<c04804c2>] sys_ioctl+0x4c/0x66
[<c0403f73>] syscall_call+0x7/0xb
=======================
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