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Date: Fri, 15 Dec 2006 12:00:17 +0100
From: Mike Galbraith <efault@....de>
To: LKML <linux-kernel@...r.kernel.org>
Subject: [lockdep] 2.6.19.1 - umount - possible circular locking dependency
detected
Greetings,
I received the below while shutting down 2.6.19.1 prior to booting the
shiny new 2.6.20-rc1 kernel.
Unmounting file systems
/dev/hda6 umounted
/dev/hda5 umounted
/dev/hda1 umounted
[ 9245.631538]
[ 9245.631547] =======================================================
[ 9245.681603] [ INFO: possible circular locking dependency detected ]
[ 9245.709897] 2.6.19.1-smp #77
[ 9245.734150] -------------------------------------------------------
[ 9245.763093] umount/12367 is trying to acquire lock:
[ 9245.790836] (iprune_mutex){--..}, at: [<c13e23dd>] mutex_lock+0x8/0xa
[ 9245.821530]
[ 9245.821535] but task is already holding lock:
[ 9245.872857] (&type->s_lock_key#6){--..}, at: [<c13e23dd>] mutex_lock+0x8/0xa
[ 9245.904047]
[ 9245.904052] which lock already depends on the new lock.
[ 9245.904058]
[ 9245.981047]
[ 9245.981053] the existing dependency chain (in reverse order) is:
[ 9246.034239]
[ 9246.034242] -> #3 (&type->s_lock_key#6){--..}:
[ 9246.085560] [<c103dd54>] add_lock_to_list+0x3b/0x87
[ 9246.114129] [<c1040420>] __lock_acquire+0xb75/0xc1a
[ 9246.142207] [<c10407f1>] lock_acquire+0x5d/0x79
[ 9246.170140] [<c13e21ad>] __mutex_lock_slowpath+0x6e/0x296
[ 9246.199547] [<c13e23dd>] mutex_lock+0x8/0xa
[ 9246.227310] [<c10c64e5>] ext3_orphan_add+0x37/0x1f4
[ 9246.255370] [<c10c3ab1>] ext3_setattr+0x18c/0x200
[ 9246.282959] [<c108b9ca>] notify_change+0x2aa/0x36c
[ 9246.310186] [<c10763ac>] do_truncate+0x53/0x6c
[ 9246.336668] [<c107fd9f>] may_open+0x1c2/0x264
[ 9246.362506] [<c1081e95>] open_namei+0x75/0x664
[ 9246.387974] [<c10760fb>] do_filp_open+0x26/0x43
[ 9246.413418] [<c1076159>] do_sys_open+0x41/0xc5
[ 9246.439131] [<c1076215>] sys_open+0x1c/0x1e
[ 9246.464189] [<c1003173>] syscall_call+0x7/0xb
[ 9246.489140] [<0805cf97>] 0x805cf97
[ 9246.513303] [<ffffffff>] 0xffffffff
[ 9246.536826]
[ 9246.536829] -> #2 (&inode->i_alloc_sem){--..}:
[ 9246.578970] [<c103dd54>] add_lock_to_list+0x3b/0x87
[ 9246.603222] [<c1040420>] __lock_acquire+0xb75/0xc1a
[ 9246.627777] [<c10407f1>] lock_acquire+0x5d/0x79
[ 9246.651598] [<c103bd81>] down_write+0x2b/0x45
[ 9246.674840] [<c108b999>] notify_change+0x279/0x36c
[ 9246.698330] [<c10763ac>] do_truncate+0x53/0x6c
[ 9246.721087] [<c107fd9f>] may_open+0x1c2/0x264
[ 9246.743362] [<c1081e95>] open_namei+0x75/0x664
[ 9246.765448] [<c10760fb>] do_filp_open+0x26/0x43
[ 9246.787653] [<c1076159>] do_sys_open+0x41/0xc5
[ 9246.809368] [<c1076215>] sys_open+0x1c/0x1e
[ 9246.830338] [<c1003173>] syscall_call+0x7/0xb
[ 9246.850989] [<b7e53857>] 0xb7e53857
[ 9246.870873] [<ffffffff>] 0xffffffff
[ 9246.890894]
[ 9246.890898] -> #1 (&inode->i_mutex){--..}:
[ 9246.926067] [<c103dd54>] add_lock_to_list+0x3b/0x87
[ 9246.947419] [<c1040420>] __lock_acquire+0xb75/0xc1a
[ 9246.968599] [<c10407f1>] lock_acquire+0x5d/0x79
[ 9246.989342] [<c13e21ad>] __mutex_lock_slowpath+0x6e/0x296
[ 9247.011279] [<c13e23dd>] mutex_lock+0x8/0xa
[ 9247.031696] [<c117657a>] ntfs_put_inode+0x42/0x77
[ 9247.052712] [<c108a1bd>] iput+0x2b/0x6c
[ 9247.072559] [<c10a025f>] inotify_unmount_inodes+0x14d/0x18d
[ 9247.094668] [<c108b072>] invalidate_inodes+0x36/0xd6
[ 9247.116202] [<c1079308>] generic_shutdown_super+0x4f/0x11c
[ 9247.138409] [<c10793f5>] kill_block_super+0x20/0x32
[ 9247.159946] [<c10794bb>] deactivate_super+0x63/0x75
[ 9247.181408] [<c108d034>] mntput_no_expire+0x44/0x74
[ 9247.202804] [<c107e3df>] path_release_on_umount+0x15/0x18
[ 9247.225053] [<c108e0fd>] sys_umount+0x3b/0x264
[ 9247.246357] [<c108e33f>] sys_oldumount+0x19/0x1b
[ 9247.267763] [<c1003173>] syscall_call+0x7/0xb
[ 9247.288788] [<b7e84c3d>] 0xb7e84c3d
[ 9247.308810] [<ffffffff>] 0xffffffff
[ 9247.328928]
[ 9247.328933] -> #0 (iprune_mutex){--..}:
[ 9247.364381] [<c103f875>] print_circular_bug_tail+0x30/0x66
[ 9247.386545] [<c1040231>] __lock_acquire+0x986/0xc1a
[ 9247.408336] [<c10407f1>] lock_acquire+0x5d/0x79
[ 9247.429710] [<c13e21ad>] __mutex_lock_slowpath+0x6e/0x296
[ 9247.452340] [<c13e23dd>] mutex_lock+0x8/0xa
[ 9247.473526] [<c108b05a>] invalidate_inodes+0x1e/0xd6
[ 9247.495752] [<c1079308>] generic_shutdown_super+0x4f/0x11c
[ 9247.518735] [<c10793f5>] kill_block_super+0x20/0x32
[ 9247.541071] [<c10794bb>] deactivate_super+0x63/0x75
[ 9247.563304] [<c108d034>] mntput_no_expire+0x44/0x74
[ 9247.585587] [<c107e3df>] path_release_on_umount+0x15/0x18
[ 9247.608641] [<c108e0fd>] sys_umount+0x3b/0x264
[ 9247.630683] [<c108e33f>] sys_oldumount+0x19/0x1b
[ 9247.652996] [<c1003173>] syscall_call+0x7/0xb
[ 9247.675075] [<b7e84c3d>] 0xb7e84c3d
[ 9247.696032] [<ffffffff>] 0xffffffff
[ 9247.716323]
[ 9247.716326] other info that might help us debug this:
[ 9247.716332]
[ 9247.770368] 2 locks held by umount/12367:
[ 9247.790145] #0: (&type->s_umount_key#14){----}, at: [<c10794b6>] deactivate_super+0x5e/0x75
[ 9247.816437] #1: (&type->s_lock_key#6){--..}, at: [<c13e23dd>] mutex_lock+0x8/0xa
[ 9247.842046]
[ 9247.842050] stack backtrace:
[ 9247.879470] [<c10041e3>] dump_trace+0x1c1/0x1f0
[ 9247.901070] [<c100422c>] show_trace_log_lvl+0x1a/0x30
[ 9247.923161] [<c1004967>] show_trace+0x12/0x14
[ 9247.944458] [<c1004a88>] dump_stack+0x19/0x1b
[ 9247.965607] [<c103f8a2>] print_circular_bug_tail+0x5d/0x66
[ 9247.987904] [<c1040231>] __lock_acquire+0x986/0xc1a
[ 9248.009735] [<c10407f1>] lock_acquire+0x5d/0x79
[ 9248.031240] [<c13e21ad>] __mutex_lock_slowpath+0x6e/0x296
[ 9248.053972] [<c13e23dd>] mutex_lock+0x8/0xa
[ 9248.075334] [<c108b05a>] invalidate_inodes+0x1e/0xd6
[ 9248.097799] [<c1079308>] generic_shutdown_super+0x4f/0x11c
[ 9248.121004] [<c10793f5>] kill_block_super+0x20/0x32
[ 9248.143751] [<c10794bb>] deactivate_super+0x63/0x75
[ 9248.166061] [<c108d034>] mntput_no_expire+0x44/0x74
[ 9248.188218] [<c107e3df>] path_release_on_umount+0x15/0x18
[ 9248.211080] [<c108e0fd>] sys_umount+0x3b/0x264
[ 9248.232795] [<c108e33f>] sys_oldumount+0x19/0x1b
[ 9248.254554] [<c1003173>] syscall_call+0x7/0xb
[ 9248.275897] [<b7e84c3d>] 0xb7e84c3d
[ 9248.296118] =======================
/dev/hdc1 umounted
devpts umounted
sysfs umounted
/dev/hdc3 umounted
doneShutting down MD Raid done
Stopping udevd:done
done
proc umounted
Please stand by while rebooting the system...
[ 9252.127548] md: stopping all md devices.
[ 9253.589125] Restarting system.
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