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From: Folkert van Heusden <folkert@vanheusden.com>
To: linux-kernel@vger.kernel.org
Subject: [2.6.20] BUG: workqueue leaked lock
Date: Tue, 13 Mar 2007 17:50:14 +0100	[thread overview]
Message-ID: <20070313165014.GE31960@vanheusden.com> (raw)

...
[ 1756.728209] BUG: workqueue leaked lock or atomic: nfsd4/0x00000000/3577
[ 1756.728271]     last function: laundromat_main+0x0/0x69 [nfsd]
[ 1756.728392] 2 locks held by nfsd4/3577:
[ 1756.728435]  #0:  (client_mutex){--..}, at: [<c1205b88>] mutex_lock+0x8/0xa
[ 1756.728679]  #1:  (&inode->i_mutex){--..}, at: [<c1205b88>] mutex_lock+0x8/0xa
[ 1756.728923]  [<c1003d57>] show_trace_log_lvl+0x1a/0x30
[ 1756.729015]  [<c1003d7f>] show_trace+0x12/0x14
[ 1756.729103]  [<c1003e79>] dump_stack+0x16/0x18
[ 1756.729187]  [<c102c2e8>] run_workqueue+0x167/0x170
[ 1756.729276]  [<c102c437>] worker_thread+0x146/0x165
[ 1756.729368]  [<c102f797>] kthread+0x97/0xc4
[ 1756.729456]  [<c1003bdb>] kernel_thread_helper+0x7/0x10
[ 1756.729547]  =======================
[ 1792.436492] svc: unknown version (0 for prog 100003, nfsd)
[ 1846.683648] BUG: workqueue leaked lock or atomic: nfsd4/0x00000000/3577
[ 1846.683701]     last function: laundromat_main+0x0/0x69 [nfsd]
[ 1846.683832] 2 locks held by nfsd4/3577:
[ 1846.683885]  #0:  (client_mutex){--..}, at: [<c1205b88>] mutex_lock+0x8/0xa
[ 1846.683980]  #1:  (&inode->i_mutex){--..}, at: [<c1205b88>] mutex_lock+0x8/0xa
[ 1846.683988]  [<c1003d57>] show_trace_log_lvl+0x1a/0x30
[ 1846.683994]  [<c1003d7f>] show_trace+0x12/0x14
[ 1846.683997]  [<c1003e79>] dump_stack+0x16/0x18
[ 1846.684001]  [<c102c2e8>] run_workqueue+0x167/0x170
[ 1846.684006]  [<c102c437>] worker_thread+0x146/0x165
[ 1846.684012]  [<c102f797>] kthread+0x97/0xc4
[ 1846.684023]  [<c1003bdb>] kernel_thread_helper+0x7/0x10
[ 1846.684027]  =======================
[ 1936.638930] BUG: workqueue leaked lock or atomic: nfsd4/0x00000000/3577
[ 1936.638992]     last function: laundromat_main+0x0/0x69 [nfsd]
[ 1936.639141] 2 locks held by nfsd4/3577:
[ 1936.639195]  #0:  (client_mutex){--..}, at: [<c1205b88>] mutex_lock+0x8/0xa
[ 1936.639292]  #1:  (&inode->i_mutex){--..}, at: [<c1205b88>] mutex_lock+0x8/0xa
[ 1936.639301]  [<c1003d57>] show_trace_log_lvl+0x1a/0x30
[ 1936.639306]  [<c1003d7f>] show_trace+0x12/0x14
[ 1936.639311]  [<c1003e79>] dump_stack+0x16/0x18
[ 1936.639314]  [<c102c2e8>] run_workqueue+0x167/0x170
[ 1936.639321]  [<c102c437>] worker_thread+0x146/0x165
[ 1936.639325]  [<c102f797>] kthread+0x97/0xc4
[ 1936.639329]  [<c1003bdb>] kernel_thread_helper+0x7/0x10
[ 1936.639332]  =======================

this repeats several times

also:

[  137.324255] =======================================================
[  137.324359] [ INFO: possible circular locking dependency detected ]
[  137.324412] 2.6.20 #2
[  137.324457] -------------------------------------------------------
[  137.324510] tor/4857 is trying to acquire lock:
[  137.324559]  (tty_mutex){--..}, at: [<c1205b88>] mutex_lock+0x8/0xa
[  137.324765]
[  137.324766] but task is already holding lock:
[  137.324859]  (&s->s_dquot.dqptr_sem){----}, at: [<c1099403>] dquot_alloc_space+0x50/0x189
[  137.325067]
[  137.325069] which lock already depends on the new lock.
[  137.325071]
[  137.325206]
[  137.325208] the existing dependency chain (in reverse order) is:
[  137.325300]
[  137.325301] -> #4 (&s->s_dquot.dqptr_sem){----}:
[  137.325501]        [<c10354b8>] check_prev_add+0x154/0x206
[  137.325852]        [<c10355d4>] check_prevs_add+0x6a/0xd5
[  137.326197]        [<c1036dd2>] __lock_acquire+0x61c/0xa05
[  137.326538]        [<c1037624>] lock_acquire+0x62/0x81
[  137.326887]        [<c1032b5f>] down_read+0x2b/0x3d
[  137.327241]        [<c1099403>] dquot_alloc_space+0x50/0x189
[  137.327588]        [<c10a98e6>] ext3_new_blocks+0x44b/0x5a2
[  137.327935]        [<c10abe78>] ext3_alloc_blocks+0x40/0xdf
[  137.328280]        [<c10abf67>] ext3_alloc_branch+0x50/0x21b
[  137.328622]        [<c10ac445>] ext3_get_blocks_handle+0x1b8/0x367
[  137.328980]        [<c10ac76e>] ext3_getblk+0x97/0x228
[  137.329330]        [<c10ac919>] ext3_bread+0x1a/0x78
[  137.329672]        [<c10b1bc2>] ext3_mkdir+0xf4/0x270
[  137.330022]        [<c1072a6a>] vfs_mkdir+0xb3/0x161
[  137.330368]        [<c1072ba4>] sys_mkdirat+0x8c/0xc4
[  137.330714]        [<c1072bfc>] sys_mkdir+0x20/0x22
[  137.331063]        [<c1002f78>] syscall_call+0x7/0xb
[  137.331406]        [<ffffffff>] 0xffffffff
[  137.331771]
[  137.331772] -> #3 (&ei->truncate_mutex){--..}:
[  137.331979]        [<c10354b8>] check_prev_add+0x154/0x206
[  137.332332]        [<c10355d4>] check_prevs_add+0x6a/0xd5
[  137.332676]        [<c1036dd2>] __lock_acquire+0x61c/0xa05
[  137.333025]        [<c1037624>] lock_acquire+0x62/0x81
[  137.333370]        [<c1205c09>] __mutex_lock_slowpath+0x75/0x28c
[  137.333930]        [<c1205b88>] mutex_lock+0x8/0xa
[  137.334271]        [<c10ae14f>] ext3_truncate+0x170/0x468
[  137.334613]        [<c1058e72>] vmtruncate+0xa6/0x116
[  137.334949]        [<c107d587>] inode_setattr+0x145/0x16c
[  137.334613]        [<c1058e72>] vmtruncate+0xa6/0x116
[  137.334949]        [<c107d587>] inode_setattr+0x145/0x16c
[  137.335286]        [<c10af071>] ext3_setattr+0x150/0x22f
[  137.335627]        [<c107d909>] notify_change+0x35b/0x392
[  137.335968]        [<c10679d2>] do_truncate+0x52/0x75
[  137.336305]        [<c1071f5e>] may_open+0x1ec/0x231
[  137.336642]        [<c107211c>] open_namei+0xda/0x59b
[  137.336975]        [<c106863a>] do_filp_open+0x2c/0x53
[  137.337310]        [<c106896f>] do_sys_open+0x52/0xd8
[  137.337645]        [<c1068a11>] sys_open+0x1c/0x1e
[  137.337980]        [<c1002f78>] syscall_call+0x7/0xb
[  137.338315]        [<ffffffff>] 0xffffffff
[  137.338665]
[  137.338666] -> #2 (&inode->i_alloc_sem){--..}:
[  137.338864]        [<c10354b8>] check_prev_add+0x154/0x206
[  137.339200]        [<c10355d4>] check_prevs_add+0x6a/0xd5
[  137.339535]        [<c1036dd2>] __lock_acquire+0x61c/0xa05
[  137.339874]        [<c1037624>] lock_acquire+0x62/0x81
[  137.340207]        [<c1032bf5>] down_write+0x2b/0x45
[  137.340545]        [<c107d890>] notify_change+0x2e2/0x392
[  137.340886]        [<c10679d2>] do_truncate+0x52/0x75
[  137.341222]        [<c1071f5e>] may_open+0x1ec/0x231
[  137.341557]        [<c107211c>] open_namei+0xda/0x59b
[  137.341898]        [<c106863a>] do_filp_open+0x2c/0x53
[  137.342236]        [<c106896f>] do_sys_open+0x52/0xd8
[  137.342572]        [<c1068a11>] sys_open+0x1c/0x1e
[  137.343109]        [<c1002f78>] syscall_call+0x7/0xb
[  137.343444]        [<ffffffff>] 0xffffffff
[  137.343792]
[  137.343793] -> #1 (&sysfs_inode_imutex_key){--..}:
[  137.343988]        [<c10354b8>] check_prev_add+0x154/0x206
[  137.344320]        [<c10355d4>] check_prevs_add+0x6a/0xd5
[  137.344655]        [<c1036dd2>] __lock_acquire+0x61c/0xa05
[  137.344986]        [<c1037624>] lock_acquire+0x62/0x81
[  137.345321]        [<c1205c09>] __mutex_lock_slowpath+0x75/0x28c
[  137.345658]        [<c1205b88>] mutex_lock+0x8/0xa
[  137.345991]        [<c10a5447>] sysfs_hash_and_remove+0x43/0x11c
[  137.346328]        [<c10a5ef7>] sysfs_remove_file+0xd/0x12
[  137.346660]        [<c114b00c>] device_remove_file+0x32/0x44
[  137.346992]        [<c114b6d9>] device_del+0x174/0x1d2
[  137.347325]        [<c114b742>] device_unregister+0xb/0x15
[  137.347661]        [<c114b93d>] device_destroy+0x8d/0x9a
[  137.347994]        [<c1137a38>] vcs_remove_sysfs+0x1c/0x38
[  137.348328]        [<c113e0d8>] con_close+0x5e/0x6b
[  137.348661]        [<c1130103>] release_dev+0x4c4/0x6ce
[  137.348999]        [<c113077b>] tty_release+0x12/0x1c
[  137.349332]        [<c106a471>] __fput+0x145/0x16e
[  137.349671]        [<c106a32a>] fput+0x19/0x1b
[  137.350004]        [<c1068a92>] filp_close+0x3c/0x75
[  137.350338]        [<c1068b34>] sys_close+0x69/0xb4
[  137.350671]        [<c1002f78>] syscall_call+0x7/0xb
[  137.351003]        [<ffffffff>] 0xffffffff
[  137.351352]
[  137.351354] -> #0 (tty_mutex){--..}:
[  137.351544]        [<c1035398>] check_prev_add+0x34/0x206
[  137.352086]        [<c10355d4>] check_prevs_add+0x6a/0xd5
[  137.352421]        [<c1036dd2>] __lock_acquire+0x61c/0xa05
[  137.352759]        [<c1037624>] lock_acquire+0x62/0x81
[  137.353090]        [<c1205c09>] __mutex_lock_slowpath+0x75/0x28c
[  137.353426]        [<c1205b88>] mutex_lock+0x8/0xa
[  137.353761]        [<c1098d79>] print_warning+0x8c/0x15d
[  137.354096]        [<c1099537>] dquot_alloc_space+0x184/0x189
[  137.354434]        [<c10a98e6>] ext3_new_blocks+0x44b/0x5a2
[  137.354773]        [<c10abe78>] ext3_alloc_blocks+0x40/0xdf
[  137.355109]        [<c10abf67>] ext3_alloc_branch+0x50/0x21b
[  137.355446]        [<c10ac445>] ext3_get_blocks_handle+0x1b8/0x367
[  137.355783]        [<c10ac66c>] ext3_get_block+0x78/0xe3
[  137.356121]        [<c108a239>] __block_prepare_write+0x168/0x3fd
[  137.356459]        [<c108ad10>] block_prepare_write+0x28/0x3b
[  137.356800]        [<c10acbcd>] ext3_prepare_write+0x3f/0x18d
[  137.357138]        [<c104dbe5>] generic_file_buffered_write+0x197/0x5e6
[  137.357474]        [<c104e2e2>] __generic_file_aio_write_nolock+0x2ae/0x5ad
[  137.357817]        [<c104e6ea>] generic_file_aio_write+0x58/0xc4
[  137.358156]        [<c10aa723>] ext3_file_write+0x2d/0xba
[  137.357817]        [<c104e6ea>] generic_file_aio_write+0x58/0xc4
[  137.358156]        [<c10aa723>] ext3_file_write+0x2d/0xba
[  137.358495]        [<c1069441>] do_sync_write+0xc7/0x116
[  137.358838]        [<c1069612>] vfs_write+0x182/0x187
[  137.359176]        [<c10696b8>] sys_write+0x3d/0x64
[  137.359513]        [<c1002f78>] syscall_call+0x7/0xb
[  137.359848]        [<ffffffff>] 0xffffffff
[  137.360200]
[  137.360202] other info that might help us debug this:
[  137.360204]
[  137.360335] 3 locks held by tor/4857:
[  137.360382]  #0:  (&inode->i_mutex){--..}, at: [<c1205b88>] mutex_lock+0x8/0xa
[  137.360625]  #1:  (&ei->truncate_mutex){--..}, at: [<c1205b88>] mutex_lock+0x8/0xa
[  137.361072]  #2:  (&s->s_dquot.dqptr_sem){----}, at: [<c1099403>] dquot_alloc_space+0x50/0x189
[  137.361313]
[  137.361314] stack backtrace:
[  137.361401]  [<c1003d57>] show_trace_log_lvl+0x1a/0x30
[  137.361488]  [<c1003d7f>] show_trace+0x12/0x14
[  137.361571]  [<c1003e79>] dump_stack+0x16/0x18
[  137.361663]  [<c1034d6d>] print_circular_bug_tail+0x6f/0x71
[  137.361752]  [<c1035398>] check_prev_add+0x34/0x206
[  137.361838]  [<c10355d4>] check_prevs_add+0x6a/0xd5
[  137.362786]  [<c1036dd2>] __lock_acquire+0x61c/0xa05
[  137.362877]  [<c1037624>] lock_acquire+0x62/0x81
[  137.362960]  [<c1205c09>] __mutex_lock_slowpath+0x75/0x28c
[  137.363047]  [<c1205b88>] mutex_lock+0x8/0xa
[  137.363132]  [<c1098d79>] print_warning+0x8c/0x15d
[  137.363217]  [<c1099537>] dquot_alloc_space+0x184/0x189
[  137.363302]  [<c10a98e6>] ext3_new_blocks+0x44b/0x5a2
[  137.363391]  [<c10abe78>] ext3_alloc_blocks+0x40/0xdf
[  137.363476]  [<c10abf67>] ext3_alloc_branch+0x50/0x21b
[  137.363561]  [<c10ac445>] ext3_get_blocks_handle+0x1b8/0x367
[  137.363650]  [<c10ac66c>] ext3_get_block+0x78/0xe3
[  137.363735]  [<c108a239>] __block_prepare_write+0x168/0x3fd
[  137.363822]  [<c108ad10>] block_prepare_write+0x28/0x3b
[  137.363908]  [<c10acbcd>] ext3_prepare_write+0x3f/0x18d
[  137.363996]  [<c104dbe5>] generic_file_buffered_write+0x197/0x5e6
[  137.364084]  [<c104e2e2>] __generic_file_aio_write_nolock+0x2ae/0x5ad
[  137.364171]  [<c104e6ea>] generic_file_aio_write+0x58/0xc4
[  137.364254]  [<c10aa723>] ext3_file_write+0x2d/0xba
[  137.364340]  [<c1069441>] do_sync_write+0xc7/0x116
[  137.364425]  [<c1069612>] vfs_write+0x182/0x187
[  137.364511]  [<c10696b8>] sys_write+0x3d/0x64
[  137.364595]  [<c1002f78>] syscall_call+0x7/0xb
[  137.364682]  =======================
[  137.471738] BUG: workqueue leaked lock or atomic: nfsd4/0x00000000/3577
[  137.471812]     last function: laundromat_main+0x0/0x69 [nfsd]
[  137.471923] 2 locks held by nfsd4/3577:
[  137.471971]  #0:  (client_mutex){--..}, at: [<c1205b88>] mutex_lock+0x8/0xa
[  137.472209]  #1:  (&inode->i_mutex){--..}, at: [<c1205b88>] mutex_lock+0x8/0xa
[  137.472445]  [<c1003d57>] show_trace_log_lvl+0x1a/0x30
[  137.472528]  [<c1003d7f>] show_trace+0x12/0x14
[  137.472613]  [<c1003e79>] dump_stack+0x16/0x18
[  137.472695]  [<c102c2e8>] run_workqueue+0x167/0x170
[  137.472779]  [<c102c437>] worker_thread+0x146/0x165
[  137.472861]  [<c102f797>] kthread+0x97/0xc4
[  137.472943]  [<c1003bdb>] kernel_thread_helper+0x7/0x10
[  137.473026]  =======================


Folkert van Heusden

-- 
MultiTail is a versatile tool for watching logfiles and output of
commands. Filtering, coloring, merging, diff-view, etc.
http://www.vanheusden.com/multitail/
----------------------------------------------------------------------
Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com

             reply	other threads:[~2007-03-13 16:53 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-03-13 16:50 Folkert van Heusden [this message]
2007-03-15 19:06 ` Andrew Morton
2007-03-15 19:17   ` Folkert van Heusden
2007-03-16 14:49     ` Jarek Poplawski
2007-03-20 11:17     ` dquot.c: possible circular locking " Jarek Poplawski
2007-03-20 11:22       ` Jarek Poplawski
2007-03-20 11:31         ` Jarek Poplawski
2007-03-20 12:19           ` Jan Kara
2007-03-20 13:35             ` Arjan van de Ven
2007-03-20 14:21               ` Jan Kara
2007-03-20 14:18                 ` Arjan van de Ven
2007-03-20 13:44             ` Jarek Poplawski
2007-03-20 14:00               ` Jan Kara
2007-03-16  8:41   ` Peter Zijlstra
2007-03-16 11:39     ` Andrew Morton
2007-03-19  6:24       ` Neil Brown
2007-03-20  9:37         ` [PATCH] " Jarek Poplawski
2007-03-20 16:07           ` Oleg Nesterov
2007-03-21  8:05             ` Jarek Poplawski
2007-03-21 14:46               ` Oleg Nesterov
2007-03-21 15:16                 ` Jarek Poplawski
2007-03-21 15:17                   ` Folkert van Heusden
2007-03-21 15:29                   ` Oleg Nesterov
2007-03-21 18:16                     ` Oleg Nesterov
2007-03-22  6:11                       ` [PATCH] lockdep: lockdep_depth vs. debug_locks " Jarek Poplawski
2007-03-22  6:28                         ` Andrew Morton
2007-03-22  7:06                           ` Jarek Poplawski
2007-03-22  7:23                             ` Jarek Poplawski
2007-03-22  7:13                           ` Jarek Poplawski
2007-03-22  8:26                           ` Jarek Poplawski
2007-03-22  6:57                         ` [PATCH] lockdep: debug_show_all_locks & debug_show_held_locks vs. debug_locks Jarek Poplawski
2007-03-22  7:23                           ` Peter Zijlstra
2007-03-22  9:06                             ` Ingo Molnar
2007-03-22  7:22                         ` [PATCH] lockdep: lockdep_depth vs. debug_locks Re: [2.6.20] BUG: workqueue leaked lock Peter Zijlstra
2007-03-22  9:06                           ` Ingo Molnar

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