Comment 8 for bug 624877

P.P.S. in /var/log/kern.log

Nov 12 16:48:16 evo1 kernel: [ 4316.056166] INFO: task dpkg:11443 blocked for more than 120 seconds.
Nov 12 16:48:16 evo1 kernel: [ 4316.056454] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Nov 12 16:48:16 evo1 kernel: [ 4316.056774] dpkg D 0000000000000000 0 11443 11417 0x00000000
Nov 12 16:48:16 evo1 kernel: [ 4316.056780] ffff880330c1fd38 0000000000000082 0000000000015bc0 0000000000015bc0
Nov 12 16:48:16 evo1 kernel: [ 4316.056785] ffff88032ea51ab0 ffff880330c1ffd8 0000000000015bc0 ffff88032ea516f0
Nov 12 16:48:16 evo1 kernel: [ 4316.056789] 0000000000015bc0 ffff880330c1ffd8 0000000000015bc0 ffff88032ea51ab0
Nov 12 16:48:16 evo1 kernel: [ 4316.056793] Call Trace:
Nov 12 16:48:16 evo1 kernel: [ 4316.056804] [<ffffffff81541b6d>] schedule_timeout+0x22d/0x300
Nov 12 16:48:16 evo1 kernel: [ 4316.056811] [<ffffffff8105da22>] ? enqueue_entity+0x122/0x1a0
Nov 12 16:48:16 evo1 kernel: [ 4316.056815] [<ffffffff81061e14>] ? check_preempt_wakeup+0x1c4/0x3c0
Nov 12 16:48:16 evo1 kernel: [ 4316.056819] [<ffffffff8154178b>] wait_for_common+0xdb/0x180
Nov 12 16:48:16 evo1 kernel: [ 4316.056824] [<ffffffff8105a124>] ? try_to_wake_up+0x284/0x380
Nov 12 16:48:16 evo1 kernel: [ 4316.056828] [<ffffffff8105a220>] ? default_wake_function+0x0/0x20
Nov 12 16:48:16 evo1 kernel: [ 4316.056832] [<ffffffff815418ed>] wait_for_completion+0x1d/0x20
Nov 12 16:48:16 evo1 kernel: [ 4316.056837] [<ffffffff81165e17>] sync_inodes_sb+0x87/0xb0
Nov 12 16:48:16 evo1 kernel: [ 4316.056842] [<ffffffff8116a6a2>] __sync_filesystem+0x82/0x90
Nov 12 16:48:16 evo1 kernel: [ 4316.056845] [<ffffffff8116a789>] sync_filesystems+0xd9/0x130
Nov 12 16:48:16 evo1 kernel: [ 4316.056848] [<ffffffff8116a841>] sys_sync+0x21/0x40
Nov 12 16:48:16 evo1 kernel: [ 4316.056854] [<ffffffff810121b2>] system_call_fastpath+0x16/0x1b
Nov 12 16:50:16 evo1 kernel: [ 4435.862222] INFO: task dpkg:11443 blocked for more than 120 seconds.
Nov 12 16:50:16 evo1 kernel: [ 4435.862468] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Nov 12 16:50:16 evo1 kernel: [ 4435.862783] dpkg D 0000000000000000 0 11443 11417 0x00000000
Nov 12 16:50:16 evo1 kernel: [ 4435.862787] ffff880330c1fd38 0000000000000082 0000000000015bc0 0000000000015bc0
Nov 12 16:50:16 evo1 kernel: [ 4435.862790] ffff88032ea51ab0 ffff880330c1ffd8 0000000000015bc0 ffff88032ea516f0
Nov 12 16:50:16 evo1 kernel: [ 4435.862793] 0000000000015bc0 ffff880330c1ffd8 0000000000015bc0 ffff88032ea51ab0
Nov 12 16:50:16 evo1 kernel: [ 4435.862796] Call Trace:
Nov 12 16:50:16 evo1 kernel: [ 4435.862807] [<ffffffff81541b6d>] schedule_timeout+0x22d/0x300
Nov 12 16:50:16 evo1 kernel: [ 4435.862812] [<ffffffff8105da22>] ? enqueue_entity+0x122/0x1a0
Nov 12 16:50:16 evo1 kernel: [ 4435.862815] [<ffffffff81061e14>] ? check_preempt_wakeup+0x1c4/0x3c0
Nov 12 16:50:16 evo1 kernel: [ 4435.862818] [<ffffffff8154178b>] wait_for_common+0xdb/0x180
Nov 12 16:50:16 evo1 kernel: [ 4435.862822] [<ffffffff8105a124>] ? try_to_wake_up+0x284/0x380
Nov 12 16:50:16 evo1 kernel: [ 4435.862825] [<ffffffff8105a220>] ? default_wake_function+0x0/0x20
Nov 12 16:50:16 evo1 kernel: [ 4435.862828] [<ffffffff815418ed>] wait_for_completion+0x1d/0x20
Nov 12 16:50:16 evo1 kernel: [ 4435.862832] [<ffffffff81165e17>] sync_inodes_sb+0x87/0xb0
Nov 12 16:50:16 evo1 kernel: [ 4435.862836] [<ffffffff8116a6a2>] __sync_filesystem+0x82/0x90
Nov 12 16:50:16 evo1 kernel: [ 4435.862838] [<ffffffff8116a789>] sync_filesystems+0xd9/0x130
Nov 12 16:50:16 evo1 kernel: [ 4435.862840] [<ffffffff8116a841>] sys_sync+0x21/0x40
Nov 12 16:50:16 evo1 kernel: [ 4435.862845] [<ffffffff810121b2>] system_call_fastpath+0x16/0x1b
Nov 12 16:52:16 evo1 kernel: [ 4555.667050] INFO: task dpkg:11443 blocked for more than 120 seconds.
Nov 12 16:52:16 evo1 kernel: [ 4555.667299] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Nov 12 16:52:16 evo1 kernel: [ 4555.667614] dpkg D 0000000000000000 0 11443 11417 0x00000000
Nov 12 16:52:16 evo1 kernel: [ 4555.667618] ffff880330c1fd38 0000000000000082 0000000000015bc0 0000000000015bc0
Nov 12 16:52:16 evo1 kernel: [ 4555.667622] ffff88032ea51ab0 ffff880330c1ffd8 0000000000015bc0 ffff88032ea516f0
Nov 12 16:52:16 evo1 kernel: [ 4555.667625] 0000000000015bc0 ffff880330c1ffd8 0000000000015bc0 ffff88032ea51ab0
Nov 12 16:52:16 evo1 kernel: [ 4555.667628] Call Trace:
Nov 12 16:52:16 evo1 kernel: [ 4555.667638] [<ffffffff81541b6d>] schedule_timeout+0x22d/0x300
Nov 12 16:52:16 evo1 kernel: [ 4555.667643] [<ffffffff8105da22>] ? enqueue_entity+0x122/0x1a0
Nov 12 16:52:16 evo1 kernel: [ 4555.667646] [<ffffffff81061e14>] ? check_preempt_wakeup+0x1c4/0x3c0
Nov 12 16:52:16 evo1 kernel: [ 4555.667649] [<ffffffff8154178b>] wait_for_common+0xdb/0x180
Nov 12 16:52:16 evo1 kernel: [ 4555.667653] [<ffffffff8105a124>] ? try_to_wake_up+0x284/0x380
Nov 12 16:52:16 evo1 kernel: [ 4555.667656] [<ffffffff8105a220>] ? default_wake_function+0x0/0x20
Nov 12 16:52:16 evo1 kernel: [ 4555.667659] [<ffffffff815418ed>] wait_for_completion+0x1d/0x20
Nov 12 16:52:16 evo1 kernel: [ 4555.667663] [<ffffffff81165e17>] sync_inodes_sb+0x87/0xb0
Nov 12 16:52:16 evo1 kernel: [ 4555.667667] [<ffffffff8116a6a2>] __sync_filesystem+0x82/0x90
Nov 12 16:52:16 evo1 kernel: [ 4555.667669] [<ffffffff8116a789>] sync_filesystems+0xd9/0x130
Nov 12 16:52:16 evo1 kernel: [ 4555.667671] [<ffffffff8116a841>] sys_sync+0x21/0x40
Nov 12 16:52:16 evo1 kernel: [ 4555.667676] [<ffffffff810121b2>] system_call_fastpath+0x16/0x1b