[Bug 32982] Kernel locks up a few minutes after boot

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https://bugzilla.kernel.org/show_bug.cgi?id=32982





--- Comment #6 from Bart Van Assche <bart.vanassche@xxxxxxxxx>  2011-04-13 18:49:13 ---
Although I'm still busy bisecting, I'd like to report that I got the following
hung task report with head b73a21fc66fee35b41db755abebfacba48b2fc76 (had
already seen something similar before with 2.6.39-rc2):

INFO: task kjournald:918 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kjournald       D ffff880131b9ddb8     0   918      2 0x00000000
 ffff880131b9dd20 0000000000000046 ffff880131b9dca0 ffffffff8108cd6d
 0000000000000282 ffff880131b9dfd8 ffff880137729f40 ffff880131b9dfd8
 ffff880131b9c000 ffff880131b9c000 ffff880131b9c000 ffff880131b9dfd8
Call Trace:
 [<ffffffff8108cd6d>] ? trace_hardirqs_on_caller+0x14d/0x190
 [<ffffffff81048419>] ? sub_preempt_count+0xa9/0xe0
 [<ffffffffa00c615e>] journal_commit_transaction+0x13e/0x1590 [jbd]
 [<ffffffff813e2535>] ? _raw_spin_unlock_irqrestore+0x65/0x80
 [<ffffffff81048419>] ? sub_preempt_count+0xa9/0xe0
 [<ffffffff81075280>] ? wake_up_bit+0x40/0x40
 [<ffffffff8106258a>] ? del_timer_sync+0x8a/0xc0
 [<ffffffff81062500>] ? try_to_del_timer_sync+0x110/0x110
 [<ffffffffa00ca1a1>] kjournald+0xf1/0x250 [jbd]
 [<ffffffff81075280>] ? wake_up_bit+0x40/0x40
 [<ffffffffa00ca0b0>] ? commit_timeout+0x10/0x10 [jbd]
 [<ffffffff81074c66>] kthread+0x96/0xa0
 [<ffffffff813e4294>] kernel_thread_helper+0x4/0x10
 [<ffffffff8103cebb>] ? finish_task_switch+0x7b/0xe0
 [<ffffffff813e24ab>] ? _raw_spin_unlock_irq+0x3b/0x60
 [<ffffffff813e2944>] ? retint_restore_args+0xe/0xe
 [<ffffffff81074bd0>] ? __init_kthread_worker+0x70/0x70
 [<ffffffff813e4290>] ? gs_change+0xb/0xb
no locks held by kjournald/918.
INFO: task klauncher:5744 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
klauncher       D 00000001000297b4     0  5744   5743 0x00000000
 ffff88011dd73938 0000000000000046 ffff880100000000 ffffffff8108cbef
 ffffffff813e2535 ffff88011dd73fd8 ffff8801382e1f40 ffff88011dd73fd8
 ffff88011dd72000 ffff88011dd72000 ffff88011dd72000 ffff88011dd73fd8
Call Trace:
 [<ffffffff8108cbef>] ? mark_held_locks+0x6f/0xa0
 [<ffffffff813e2535>] ? _raw_spin_unlock_irqrestore+0x65/0x80
 [<ffffffff8115b830>] ? __wait_on_buffer+0x30/0x30
 [<ffffffff813df0e9>] io_schedule+0x59/0x80
 [<ffffffff8115b83e>] sleep_on_buffer+0xe/0x20
 [<ffffffff813df89a>] __wait_on_bit_lock+0x5a/0xc0
 [<ffffffff8115b830>] ? __wait_on_buffer+0x30/0x30
 [<ffffffff813df978>] out_of_line_wait_on_bit_lock+0x78/0x90
 [<ffffffff810752d0>] ? autoremove_wake_function+0x50/0x50
 [<ffffffff8115b886>] __lock_buffer+0x36/0x40
 [<ffffffffa00c56ad>] do_get_write_access+0x64d/0x660 [jbd]
 [<ffffffff81048419>] ? sub_preempt_count+0xa9/0xe0
 [<ffffffffa00c33e0>] ? start_this_handle+0x370/0x470 [jbd]
 [<ffffffffa00cb594>] ? journal_add_journal_head+0xf4/0x220 [jbd]
 [<ffffffffa00c58f1>] journal_get_write_access+0x31/0x50 [jbd]
 [<ffffffffa00efe6d>] __ext3_journal_get_write_access+0x2d/0x60 [ext3]
 [<ffffffffa00e2423>] ext3_reserve_inode_write+0x83/0xb0 [ext3]
 [<ffffffffa00e2494>] ext3_mark_inode_dirty+0x44/0x70 [ext3]
 [<ffffffffa00e4ffe>] ext3_dirty_inode+0x5e/0xa0 [ext3]
 [<ffffffff8115412f>] __mark_inode_dirty+0x3f/0x250
 [<ffffffff8114627c>] file_update_time+0xec/0x170
 [<ffffffff813dfecd>] ? mutex_lock_nested+0x27d/0x3a0
 [<ffffffff810e4138>] __generic_file_aio_write+0x1f8/0x440
 [<ffffffff810e43f5>] generic_file_aio_write+0x75/0xf0
 [<ffffffff8112ca6a>] do_sync_write+0xda/0x120
 [<ffffffff8110a2d7>] ? remove_vma+0x77/0x90
 [<ffffffff8108cdbd>] ? trace_hardirqs_on+0xd/0x10
 [<ffffffff8110a2d7>] ? remove_vma+0x77/0x90
 [<ffffffff8112d186>] vfs_write+0xc6/0x170
 [<ffffffff8112d481>] sys_write+0x51/0x90
 [<ffffffff813e31eb>] system_call_fastpath+0x16/0x1b
2 locks held by klauncher/5744:
 #0:  (&sb->s_type->i_mutex_key#11){+.+.+.}, at: [<ffffffff810e43d9>]
generic_file_aio_write+0x59/0xf0
 #1:  (jbd_handle){+.+...}, at: [<ffffffffa00c33e0>]
start_this_handle+0x370/0x470 [jbd]
INFO: task okular:4180 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
okular          D 000000010002a251     0  4180   5743 0x00000000
 ffff880041d13aa8 0000000000000046 ffff880000000000 ffffffff8108cd6d
 0000000000000282 ffff880041d13fd8 ffff880037a59f40 ffff880041d13fd8
 ffff880041d12000 ffff880041d12000 ffff880041d12000 ffff880041d13fd8
Call Trace:
 [<ffffffff8108cd6d>] ? trace_hardirqs_on_caller+0x14d/0x190
 [<ffffffffa00c32b4>] start_this_handle+0x244/0x470 [jbd]
 [<ffffffff8109a633>] ? is_module_address+0x33/0x60
 [<ffffffff81075280>] ? wake_up_bit+0x40/0x40
 [<ffffffffa00c370b>] journal_start+0xdb/0x120 [jbd]
 [<ffffffffa00eb436>] ext3_journal_start_sb+0x36/0x70 [ext3]
 [<ffffffffa00e2663>] ext3_setattr+0x1a3/0x210 [ext3]
 [<ffffffff81148556>] notify_change+0x116/0x360
 [<ffffffff8112b803>] do_truncate+0x63/0x90
 [<ffffffff81048419>] ? sub_preempt_count+0xa9/0xe0
 [<ffffffff8113abac>] do_last+0x42c/0x820
 [<ffffffff8113c3b0>] path_openat+0xd0/0x410
 [<ffffffff81102ad3>] ? might_fault+0x53/0xb0
 [<ffffffff8113c76f>] do_filp_open+0x7f/0xa0
 [<ffffffff81048419>] ? sub_preempt_count+0xa9/0xe0
 [<ffffffff813e2585>] ? _raw_spin_unlock+0x35/0x60
 [<ffffffff81149834>] ? alloc_fd+0xf4/0x150
 [<ffffffff8112c651>] do_sys_open+0x101/0x1e0
 [<ffffffff8112c750>] sys_open+0x20/0x30
 [<ffffffff813e31eb>] system_call_fastpath+0x16/0x1b
2 locks held by okular/4180:
 #0:  (&sb->s_type->i_mutex_key#11){+.+.+.}, at: [<ffffffff8112b7f7>]
do_truncate+0x57/0x90
 #1:  (&sb->s_type->i_alloc_sem_key#4){+.+...}, at: [<ffffffff811486e0>]
notify_change+0x2a0/0x360

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