[ 480.220058] INFO: task kworker/u16:1:85 blocked for more than 120 seconds.
[ 480.220067] Not tainted 4.2.0-21-generic #25~14.04.1-Ubuntu
[ 480.220068] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 480.220071] kworker/u16:1 D 0000000000000000 0 85 2 0x00000000
[ 480.220120] Workqueue: btrfs-qgroup-rescan btrfs_qgroup_rescan_helper [btrfs]
[ 480.220123] ffff88085b6ebae8 0000000000000046 ffff880855d8f2c0 ffff88085ba63300
[ 480.220125] ffff88085b6ebb18 ffff88085b6ec000 ffff88080d6569e0 ffff88080d6569d8
[ 480.220127] ffff88085ba63300 ffff880826e44178 ffff88085b6ebb08 ffffffff817b71e7
[ 480.220130] Call Trace:
[ 480.220139] [<ffffffff817b71e7>] schedule+0x37/0x80
[ 480.220142] [<ffffffff817b9ba1>] schedule_timeout+0x201/0x2a0
[ 480.220147] [<ffffffff8108c0b4>] ? wake_up_worker+0x24/0x30
[ 480.220149] [<ffffffff8108d03b>] ? insert_work+0x6b/0xb0
[ 480.220151] [<ffffffff817b7b14>] wait_for_completion+0xa4/0x110
[ 480.220154] [<ffffffff810a06e0>] ? wake_up_q+0x80/0x80
[ 480.220163] [<ffffffffc037d6d7>] btrfs_async_run_delayed_refs+0x127/0x150 [btrfs]
[ 480.220174] [<ffffffffc03987de>] __btrfs_end_transaction+0x27e/0x3d0 [btrfs]
[ 480.220183] [<ffffffff811cc888>] ? kfree+0xf8/0x130
[ 480.220193] [<ffffffffc0398940>] btrfs_end_transaction+0x10/0x20 [btrfs]
[ 480.220208] [<ffffffffc03fd380>] btrfs_qgroup_rescan_worker+0xc0/0x5d0 [btrfs]
[ 480.220213] [<ffffffff810136b3>] ? __switch_to+0x1f3/0x570
[ 480.220225] [<ffffffffc03c74d0>] normal_work_helper+0xc0/0x280 [btrfs]
[ 480.220236] [<ffffffffc03c78a2>] btrfs_qgroup_rescan_helper+0x12/0x20 [btrfs]
[ 480.220239] [<ffffffff8108f4ee>] process_one_work+0x14e/0x3d0
[ 480.220241] [<ffffffff8108fb9a>] worker_thread+0x11a/0x470
[ 480.220242] [<ffffffff8108fa80>] ? rescuer_thread+0x310/0x310
[ 480.220245] [<ffffffff81095132>] kthread+0xd2/0xf0
[ 480.220246] [<ffffffff81095060>] ? kthread_create_on_node+0x1c0/0x1c0
[ 480.220249] [<ffffffff817bae5f>] ret_from_fork+0x3f/0x70
[ 480.220251] [<ffffffff81095060>] ? kthread_create_on_node+0x1c0/0x1c0
[ 480.220289] INFO: task kworker/u16:10:1674 blocked for more than 120 seconds.
[ 480.220290] Not tainted 4.2.0-21-generic #25~14.04.1-Ubuntu
[ 480.220291] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 480.220292] kworker/u16:10 D ffff88087fcd6640 0 1674 2 0x00000000
[ 480.220306] Workqueue: btrfs-extent-refs btrfs_extent_refs_helper [btrfs]
[ 480.220308] ffff880857c8bc98 0000000000000046 ffff88085bf1b300 ffff880855d8f2c0
[ 480.220310] 0000000000000246 ffff880857c8c000 ffff88085803e1f0 ffff88085803e1f0
[ 480.220312] 0000000000000001 ffff880811308cf0 ffff880857c8bcb8 ffffffff817b71e7
[ 480.220314] Call Trace:
[ 480.220316] [<ffffffff817b71e7>] schedule+0x37/0x80
[ 480.220326] [<ffffffffc0396906>] wait_current_trans.isra.22+0xa6/0x110 [btrfs]
[ 480.220329] [<ffffffff810b7370>] ? prepare_to_wait_event+0xf0/0xf0
[ 480.220339] [<ffffffffc039824f>] start_transaction+0x37f/0x580 [btrfs]
[ 480.220350] [<ffffffffc03984a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
[ 480.220359] [<ffffffffc0382f58>] delayed_ref_async_start+0x18/0x90 [btrfs]
[ 480.220371] [<ffffffffc03c74d0>] normal_work_helper+0xc0/0x280 [btrfs]
[ 480.220383] [<ffffffffc03c78c2>] btrfs_extent_refs_helper+0x12/0x20 [btrfs]
[ 480.220385] [<ffffffff8108f4ee>] process_one_work+0x14e/0x3d0
[ 480.220386] [<ffffffff8108fb9a>] worker_thread+0x11a/0x470
[ 480.220388] [<ffffffff8108fa80>] ? rescuer_thread+0x310/0x310
[ 480.220390] [<ffffffff81095132>] kthread+0xd2/0xf0
[ 480.220392] [<ffffffff81095060>] ? kthread_create_on_node+0x1c0/0x1c0
[ 480.220393] [<ffffffff817bae5f>] ret_from_fork+0x3f/0x70
[ 480.220395] [<ffffffff81095060>] ? kthread_create_on_node+0x1c0/0x1c0
[ 480.220469] INFO: task btrfs-cleaner:3693 blocked for more than 120 seconds.
[ 480.220471] Not tainted 4.2.0-21-generic #25~14.04.1-Ubuntu
[ 480.220472] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 480.220472] btrfs-cleaner D ffff88087fd56640 0 3693 2 0x00000000
[ 480.220475] ffff88007a3d3ca8 0000000000000046 ffff88085bf1cc80 ffff88081fef9980
[ 480.220477] 0000000000000246 ffff88007a3d4000 ffff88085803e1f0 ffff88085803e1f0
[ 480.220479] 0000000000000001 ffff880811341508 ffff88007a3d3cc8 ffffffff817b71e7
[ 480.220482] Call Trace:
[ 480.220484] [<ffffffff817b71e7>] schedule+0x37/0x80
[ 480.220494] [<ffffffffc0396906>] wait_current_trans.isra.22+0xa6/0x110 [btrfs]
[ 480.220496] [<ffffffff810b7370>] ? prepare_to_wait_event+0xf0/0xf0
[ 480.220506] [<ffffffffc039831b>] start_transaction+0x44b/0x580 [btrfs]
[ 480.220516] [<ffffffffc039846b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
[ 480.220526] [<ffffffffc0381576>] btrfs_drop_snapshot+0x4c6/0x830 [btrfs]
[ 480.220537] [<ffffffffc039731c>] btrfs_clean_one_deleted_snapshot+0xbc/0x110 [btrfs]
[ 480.220546] [<ffffffffc038fcce>] cleaner_kthread+0x14e/0x1e0 [btrfs]
[ 480.220556] [<ffffffffc038fb80>] ? check_leaf+0x340/0x340 [btrfs]
[ 480.220558] [<ffffffff81095132>] kthread+0xd2/0xf0
[ 480.220560] [<ffffffff81095060>] ? kthread_create_on_node+0x1c0/0x1c0
[ 480.220561] [<ffffffff817bae5f>] ret_from_fork+0x3f/0x70
[ 480.220563] [<ffffffff81095060>] ? kthread_create_on_node+0x1c0/0x1c0
[ 480.220566] INFO: task mc:3780 blocked for more than 120 seconds.
[ 480.220567] Not tainted 4.2.0-21-generic #25~14.04.1-Ubuntu
[ 480.220568] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 480.220569] mc D ffff88087fc96640 0 3780 3714 0x00000000
[ 480.220572] ffff8807ff93fa08 0000000000000086 ffff88085bf1a640 ffff8808242fb300
[ 480.220575] 0000000000000246 ffff8807ff940000 ffff8807fca981f0 ffff8807fca981f0
[ 480.220577] 0000000000000001 ffff88081124d7e8 ffff8807ff93fa28 ffffffff817b71e7
[ 480.220579] Call Trace:
[ 480.220581] [<ffffffff817b71e7>] schedule+0x37/0x80
[ 480.220591] [<ffffffffc0396906>] wait_current_trans.isra.22+0xa6/0x110 [btrfs]
[ 480.220593] [<ffffffff810b7370>] ? prepare_to_wait_event+0xf0/0xf0
[ 480.220603] [<ffffffffc039831b>] start_transaction+0x44b/0x580 [btrfs]
[ 480.220614] [<ffffffffc039846b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
[ 480.220625] [<ffffffffc03a4065>] btrfs_orphan_cleanup+0x95/0x410 [btrfs]
[ 480.220636] [<ffffffffc03a4702>] btrfs_lookup_dentry+0x322/0x4a0 [btrfs]
[ 480.220647] [<ffffffffc03a4896>] btrfs_lookup+0x16/0x40 [btrfs]
[ 480.220650] [<ffffffff811f43cd>] lookup_real+0x1d/0x50
[ 480.220651] [<ffffffff811f47f3>] __lookup_hash+0x33/0x40
[ 480.220653] [<ffffffff811f71ff>] walk_component+0x15f/0x200
[ 480.220655] [<ffffffff811f648c>] ? path_init+0x1ec/0x3e0
[ 480.220657] [<ffffffff811f79d0>] path_lookupat+0x60/0x110
[ 480.220665] [<ffffffffc037602a>] ? btrfs_next_old_leaf+0x1da/0x4a0 [btrfs]
[ 480.220668] [<ffffffff811f9da8>] filename_lookup+0x98/0x160
[ 480.220669] [<ffffffff811cd4a5>] ? kmem_cache_alloc+0x185/0x1f0
[ 480.220671] [<ffffffff811f99df>] ? getname_flags+0x4f/0x1f0
[ 480.220673] [<ffffffff811f9f2a>] user_path_at_empty+0x3a/0x50
[ 480.220676] [<ffffffff811ef913>] vfs_fstatat+0x53/0xa0
[ 480.220679] [<ffffffff812065a3>] ? touch_atime+0x23/0xa0
[ 480.220681] [<ffffffff811efdd2>] SYSC_newlstat+0x22/0x40
[ 480.220684] [<ffffffff811fe18d>] ? SyS_getdents+0x9d/0xf0
[ 480.220685] [<ffffffff811fde60>] ? fillonedir+0xc0/0xc0
[ 480.220687] [<ffffffff811f000e>] SyS_newlstat+0xe/0x10
[ 480.220689] [<ffffffff817baa32>] entry_SYSCALL_64_fastpath+0x16/0x75
[ 600.220047] INFO: task kworker/u16:1:85 blocked for more than 120 seconds.
[ 600.220055] Not tainted 4.2.0-21-generic #25~14.04.1-Ubuntu
[ 600.220056] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 600.220058] kworker/u16:1 D 0000000000000000 0 85 2 0x00000000
[ 600.220099] Workqueue: btrfs-qgroup-rescan btrfs_qgroup_rescan_helper [btrfs]
[ 600.220101] ffff88085b6ebae8 0000000000000046 ffff880855d8f2c0 ffff88085ba63300
[ 600.220104] ffff88085b6ebb18 ffff88085b6ec000 ffff88080d6569e0 ffff88080d6569d8
[ 600.220106] ffff88085ba63300 ffff880826e44178 ffff88085b6ebb08 ffffffff817b71e7
[ 600.220108] Call Trace:
[ 600.220117] [<ffffffff817b71e7>] schedule+0x37/0x80
[ 600.220119] [<ffffffff817b9ba1>] schedule_timeout+0x201/0x2a0
[ 600.220124] [<ffffffff8108c0b4>] ? wake_up_worker+0x24/0x30
[ 600.220126] [<ffffffff8108d03b>] ? insert_work+0x6b/0xb0
[ 600.220128] [<ffffffff817b7b14>] wait_for_completion+0xa4/0x110
[ 600.220131] [<ffffffff810a06e0>] ? wake_up_q+0x80/0x80
[ 600.220140] [<ffffffffc037d6d7>] btrfs_async_run_delayed_refs+0x127/0x150 [btrfs]
[ 600.220151] [<ffffffffc03987de>] __btrfs_end_transaction+0x27e/0x3d0 [btrfs]
[ 600.220154] [<ffffffff811cc888>] ? kfree+0xf8/0x130
[ 600.220164] [<ffffffffc0398940>] btrfs_end_transaction+0x10/0x20 [btrfs]
[ 600.220178] [<ffffffffc03fd380>] btrfs_qgroup_rescan_worker+0xc0/0x5d0 [btrfs]
[ 600.220182] [<ffffffff810136b3>] ? __switch_to+0x1f3/0x570
[ 600.220194] [<ffffffffc03c74d0>] normal_work_helper+0xc0/0x280 [btrfs]
[ 600.220206] [<ffffffffc03c78a2>] btrfs_qgroup_rescan_helper+0x12/0x20 [btrfs]
[ 600.220208] [<ffffffff8108f4ee>] process_one_work+0x14e/0x3d0
[ 600.220210] [<ffffffff8108fb9a>] worker_thread+0x11a/0x470
[ 600.220212] [<ffffffff8108fa80>] ? rescuer_thread+0x310/0x310
[ 600.220214] [<ffffffff81095132>] kthread+0xd2/0xf0
[ 600.220216] [<ffffffff81095060>] ? kthread_create_on_node+0x1c0/0x1c0
[ 600.220218] [<ffffffff817bae5f>] ret_from_fork+0x3f/0x70
[ 600.220220] [<ffffffff81095060>] ? kthread_create_on_node+0x1c0/0x1c0
[ 600.220251] INFO: task kworker/u16:10:1674 blocked for more than 120 seconds.
[ 600.220252] Not tainted 4.2.0-21-generic #25~14.04.1-Ubuntu
[ 600.220253] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 600.220254] kworker/u16:10 D ffff88087fcd6640 0 1674 2 0x00000000
[ 600.220268] Workqueue: btrfs-extent-refs btrfs_extent_refs_helper [btrfs]
[ 600.220269] ffff880857c8bc98 0000000000000046 ffff88085bf1b300 ffff880855d8f2c0
[ 600.220272] 0000000000000246 ffff880857c8c000 ffff88085803e1f0 ffff88085803e1f0
[ 600.220274] 0000000000000001 ffff880811308cf0 ffff880857c8bcb8 ffffffff817b71e7
[ 600.220276] Call Trace:
[ 600.220278] [<ffffffff817b71e7>] schedule+0x37/0x80
[ 600.220288] [<ffffffffc0396906>] wait_current_trans.isra.22+0xa6/0x110 [btrfs]
[ 600.220291] [<ffffffff810b7370>] ? prepare_to_wait_event+0xf0/0xf0
[ 600.220301] [<ffffffffc039824f>] start_transaction+0x37f/0x580 [btrfs]
[ 600.220311] [<ffffffffc03984a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
[ 600.220320] [<ffffffffc0382f58>] delayed_ref_async_start+0x18/0x90 [btrfs]
[ 600.220332] [<ffffffffc03c74d0>] normal_work_helper+0xc0/0x280 [btrfs]
[ 600.220343] [<ffffffffc03c78c2>] btrfs_extent_refs_helper+0x12/0x20 [btrfs]
[ 600.220345] [<ffffffff8108f4ee>] process_one_work+0x14e/0x3d0
[ 600.220347] [<ffffffff8108fb9a>] worker_thread+0x11a/0x470
[ 600.220349] [<ffffffff8108fa80>] ? rescuer_thread+0x310/0x310
[ 600.220351] [<ffffffff81095132>] kthread+0xd2/0xf0
[ 600.220352] [<ffffffff81095060>] ? kthread_create_on_node+0x1c0/0x1c0
[ 600.220354] [<ffffffff817bae5f>] ret_from_fork+0x3f/0x70
[ 600.220356] [<ffffffff81095060>] ? kthread_create_on_node+0x1c0/0x1c0
[ 600.220415] INFO: task btrfs-cleaner:3693 blocked for more than 120 seconds.
[ 600.220416] Not tainted 4.2.0-21-generic #25~14.04.1-Ubuntu
[ 600.220417] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 600.220418] btrfs-cleaner D ffff88087fd56640 0 3693 2 0x00000000
[ 600.220421] ffff88007a3d3ca8 0000000000000046 ffff88085bf1cc80 ffff88081fef9980
[ 600.220423] 0000000000000246 ffff88007a3d4000 ffff88085803e1f0 ffff88085803e1f0
[ 600.220425] 0000000000000001 ffff880811341508 ffff88007a3d3cc8 ffffffff817b71e7
[ 600.220427] Call Trace:
[ 600.220429] [<ffffffff817b71e7>] schedule+0x37/0x80
[ 600.220439] [<ffffffffc0396906>] wait_current_trans.isra.22+0xa6/0x110 [btrfs]
[ 600.220441] [<ffffffff810b7370>] ? prepare_to_wait_event+0xf0/0xf0
[ 600.220451] [<ffffffffc039831b>] start_transaction+0x44b/0x580 [btrfs]
[ 600.220461] [<ffffffffc039846b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
[ 600.220470] [<ffffffffc0381576>] btrfs_drop_snapshot+0x4c6/0x830 [btrfs]
[ 600.220481] [<ffffffffc039731c>] btrfs_clean_one_deleted_snapshot+0xbc/0x110 [btrfs]
[ 600.220490] [<ffffffffc038fcce>] cleaner_kthread+0x14e/0x1e0 [btrfs]
[ 600.220499] [<ffffffffc038fb80>] ? check_leaf+0x340/0x340 [btrfs]
[ 600.220501] [<ffffffff81095132>] kthread+0xd2/0xf0
[ 600.220503] [<ffffffff81095060>] ? kthread_create_on_node+0x1c0/0x1c0
[ 600.220505] [<ffffffff817bae5f>] ret_from_fork+0x3f/0x70
[ 600.220506] [<ffffffff81095060>] ? kthread_create_on_node+0x1c0/0x1c0
[ 600.220509] INFO: task mc:3780 blocked for more than 120 seconds.
[ 600.220510] Not tainted 4.2.0-21-generic #25~14.04.1-Ubuntu
[ 600.220511] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 600.220512] mc D ffff88087fc96640 0 3780 3714 0x00000000
[ 600.220515] ffff8807ff93fa08 0000000000000086 ffff88085bf1a640 ffff8808242fb300
[ 600.220517] 0000000000000246 ffff8807ff940000 ffff8807fca981f0 ffff8807fca981f0
[ 600.220519] 0000000000000001 ffff88081124d7e8 ffff8807ff93fa28 ffffffff817b71e7
[ 600.220521] Call Trace:
[ 600.220523] [<ffffffff817b71e7>] schedule+0x37/0x80
[ 600.220533] [<ffffffffc0396906>] wait_current_trans.isra.22+0xa6/0x110 [btrfs]
[ 600.220535] [<ffffffff810b7370>] ? prepare_to_wait_event+0xf0/0xf0
[ 600.220545] [<ffffffffc039831b>] start_transaction+0x44b/0x580 [btrfs]
[ 600.220555] [<ffffffffc039846b>] btrfs_start_transaction+0x1b/0x20 [btrfs]
[ 600.220566] [<ffffffffc03a4065>] btrfs_orphan_cleanup+0x95/0x410 [btrfs]
[ 600.220577] [<ffffffffc03a4702>] btrfs_lookup_dentry+0x322/0x4a0 [btrfs]
[ 600.220587] [<ffffffffc03a4896>] btrfs_lookup+0x16/0x40 [btrfs]
[ 600.220590] [<ffffffff811f43cd>] lookup_real+0x1d/0x50
[ 600.220592] [<ffffffff811f47f3>] __lookup_hash+0x33/0x40
[ 600.220594] [<ffffffff811f71ff>] walk_component+0x15f/0x200
[ 600.220595] [<ffffffff811f648c>] ? path_init+0x1ec/0x3e0
[ 600.220597] [<ffffffff811f79d0>] path_lookupat+0x60/0x110
[ 600.220606] [<ffffffffc037602a>] ? btrfs_next_old_leaf+0x1da/0x4a0 [btrfs]
[ 600.220608] [<ffffffff811f9da8>] filename_lookup+0x98/0x160
[ 600.220610] [<ffffffff811cd4a5>] ? kmem_cache_alloc+0x185/0x1f0
[ 600.220611] [<ffffffff811f99df>] ? getname_flags+0x4f/0x1f0
[ 600.220613] [<ffffffff811f9f2a>] user_path_at_empty+0x3a/0x50
[ 600.220616] [<ffffffff811ef913>] vfs_fstatat+0x53/0xa0
[ 600.220619] [<ffffffff812065a3>] ? touch_atime+0x23/0xa0
[ 600.220621] [<ffffffff811efdd2>] SYSC_newlstat+0x22/0x40
[ 600.220624] [<ffffffff811fe18d>] ? SyS_getdents+0x9d/0xf0
[ 600.220625] [<ffffffff811fde60>] ? fillonedir+0xc0/0xc0
[ 600.220627] [<ffffffff811f000e>] SyS_newlstat+0xe/0x10
[ 600.220629] [<ffffffff817baa32>] entry_SYSCALL_64_fastpath+0x16/0x75
[ 720.220052] INFO: task kworker/u16:1:85 blocked for more than 120 seconds.
[ 720.220061] Not tainted 4.2.0-21-generic #25~14.04.1-Ubuntu
[ 720.220062] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 720.220064] kworker/u16:1 D 0000000000000000 0 85 2 0x00000000
[ 720.220104] Workqueue: btrfs-qgroup-rescan btrfs_qgroup_rescan_helper [btrfs]
[ 720.220106] ffff88085b6ebae8 0000000000000046 ffff880855d8f2c0 ffff88085ba63300
[ 720.220109] ffff88085b6ebb18 ffff88085b6ec000 ffff88080d6569e0 ffff88080d6569d8
[ 720.220111] ffff88085ba63300 ffff880826e44178 ffff88085b6ebb08 ffffffff817b71e7
[ 720.220113] Call Trace:
[ 720.220122] [<ffffffff817b71e7>] schedule+0x37/0x80
[ 720.220125] [<ffffffff817b9ba1>] schedule_timeout+0x201/0x2a0
[ 720.220129] [<ffffffff8108c0b4>] ? wake_up_worker+0x24/0x30
[ 720.220131] [<ffffffff8108d03b>] ? insert_work+0x6b/0xb0
[ 720.220133] [<ffffffff817b7b14>] wait_for_completion+0xa4/0x110
[ 720.220136] [<ffffffff810a06e0>] ? wake_up_q+0x80/0x80
[ 720.220146] [<ffffffffc037d6d7>] btrfs_async_run_delayed_refs+0x127/0x150 [btrfs]
[ 720.220156] [<ffffffffc03987de>] __btrfs_end_transaction+0x27e/0x3d0 [btrfs]
[ 720.220160] [<ffffffff811cc888>] ? kfree+0xf8/0x130
[ 720.220170] [<ffffffffc0398940>] btrfs_end_transaction+0x10/0x20 [btrfs]
[ 720.220188] [<ffffffffc03fd380>] btrfs_qgroup_rescan_worker+0xc0/0x5d0 [btrfs]
[ 720.220194] [<ffffffff810136b3>] ? __switch_to+0x1f3/0x570
[ 720.220206] [<ffffffffc03c74d0>] normal_work_helper+0xc0/0x280 [btrfs]
[ 720.220218] [<ffffffffc03c78a2>] btrfs_qgroup_rescan_helper+0x12/0x20 [btrfs]
[ 720.220220] [<ffffffff8108f4ee>] process_one_work+0x14e/0x3d0
[ 720.220222] [<ffffffff8108fb9a>] worker_thread+0x11a/0x470
[ 720.220224] [<ffffffff8108fa80>] ? rescuer_thread+0x310/0x310
[ 720.220226] [<ffffffff81095132>] kthread+0xd2/0xf0
[ 720.220228] [<ffffffff81095060>] ? kthread_create_on_node+0x1c0/0x1c0
[ 720.220231] [<ffffffff817bae5f>] ret_from_fork+0x3f/0x70
[ 720.220232] [<ffffffff81095060>] ? kthread_create_on_node+0x1c0/0x1c0
[ 720.220262] INFO: task kworker/u16:10:1674 blocked for more than 120 seconds.
[ 720.220263] Not tainted 4.2.0-21-generic #25~14.04.1-Ubuntu
[ 720.220264] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 720.220265] kworker/u16:10 D ffff88087fcd6640 0 1674 2 0x00000000
[ 720.220279] Workqueue: btrfs-extent-refs btrfs_extent_refs_helper [btrfs]
[ 720.220280] ffff880857c8bc98 0000000000000046 ffff88085bf1b300 ffff880855d8f2c0
[ 720.220282] 0000000000000246 ffff880857c8c000 ffff88085803e1f0 ffff88085803e1f0
[ 720.220285] 0000000000000001 ffff880811308cf0 ffff880857c8bcb8 ffffffff817b71e7
[ 720.220287] Call Trace:
[ 720.220289] [<ffffffff817b71e7>] schedule+0x37/0x80
[ 720.220299] [<ffffffffc0396906>] wait_current_trans.isra.22+0xa6/0x110 [btrfs]
[ 720.220302] [<ffffffff810b7370>] ? prepare_to_wait_event+0xf0/0xf0
[ 720.220312] [<ffffffffc039824f>] start_transaction+0x37f/0x580 [btrfs]
[ 720.220322] [<ffffffffc03984a7>] btrfs_join_transaction+0x17/0x20 [btrfs]
[ 720.220331] [<ffffffffc0382f58>] delayed_ref_async_start+0x18/0x90 [btrfs]
[ 720.220343] [<ffffffffc03c74d0>] normal_work_helper+0xc0/0x280 [btrfs]
[ 720.220354] [<ffffffffc03c78c2>] btrfs_extent_refs_helper+0x12/0x20 [btrfs]
[ 720.220356] [<ffffffff8108f4ee>] process_one_work+0x14e/0x3d0
[ 720.220358] [<ffffffff8108fb9a>] worker_thread+0x11a/0x470
[ 720.220360] [<ffffffff8108fa80>] ? rescuer_thread+0x310/0x310
[ 720.220361] [<ffffffff81095132>] kthread+0xd2/0xf0
[ 720.220363] [<ffffffff81095060>] ? kthread_create_on_node+0x1c0/0x1c0
[ 720.220365] [<ffffffff817bae5f>] ret_from_fork+0x3f/0x70
[ 720.220366] [<ffffffff81095060>] ? kthread_create_on_node+0x1c0/0x1c0
[ 829.281261] perf interrupt took too long (5007 > 5000), lowering kernel.perf_event_max_sample_rate to 25000
[ 1356.838850] ------------[ cut here ]------------
[ 1356.838865] WARNING: CPU: 7 PID: 0 at /build/linux-lts-wily-7IMwjV/linux-lts-wily-4.2.0/kernel/workqueue.c:1318 __queue_work+0x256/0x300()
[ 1356.838866] Modules linked in: ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_CHECKSUM iptable_mangle xt_tcpudp bridge stp llc ebtable_nat ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables rfcomm bnep bluetooth binfmt_misc input_leds ipmi_devintf gpio_ich i5000_edac dcdbas edac_core ipmi_ssif ioatdma coretemp kvm_intel i5k_amb ipmi_si kvm ipmi_msghandler dca lpc_ich serio_raw 8250_fintek shpchp mac_hid parport_pc ppdev lp parport btrfs xor raid6_pq hid_generic usbhid hid uas usb_storage amdkfd amd_iommu_v2 radeon i2c_algo_bit ttm drm_kms_helper psmouse drm mptsas pata_acpi mptscsih mptbase scsi_transport_sas bnx2
[ 1356.838916] CPU: 7 PID: 0 Comm: swapper/7 Not tainted 4.2.0-21-generic #25~14.04.1-Ubuntu
[ 1356.838917] Hardware name: Dell Inc. PowerEdge 2950/0H603H, BIOS 2.7.0 10/30/2010
[ 1356.838919] ffffffff81a992c8 ffff88087fdc3bd8 ffffffff817b36a3 0000000000000000
[ 1356.838921] 0000000000000000 ffff88087fdc3c18 ffffffff8107738a ffff88087fdc3c28
[ 1356.838923] 0000000000000296 ffff88078ecb5ef0 0000000000000100 ffff88085aadaf90
[ 1356.838926] Call Trace:
[ 1356.838927] <IRQ> [<ffffffff817b36a3>] dump_stack+0x45/0x57
[ 1356.838935] [<ffffffff8107738a>] warn_slowpath_common+0x8a/0xc0
[ 1356.838937] [<ffffffff8107747a>] warn_slowpath_null+0x1a/0x20
[ 1356.838939] [<ffffffff8108d2d6>] __queue_work+0x256/0x300
[ 1356.838941] [<ffffffff8108d55b>] queue_work_on+0x2b/0x50
[ 1356.838971] [<ffffffffc03c7b14>] btrfs_queue_work+0x84/0xd0 [btrfs]
[ 1356.838981] [<ffffffffc038da76>] end_workqueue_bio+0x86/0xe0 [btrfs]
[ 1356.838985] [<ffffffff81372438>] bio_endio+0x58/0x90
[ 1356.838999] [<ffffffffc0408716>] ? btrfs_bio_counter_sub+0x26/0x60 [btrfs]
[ 1356.839010] [<ffffffffc03c27c3>] btrfs_end_bio+0xf3/0x160 [btrfs]
[ 1356.839012] [<ffffffff81372438>] bio_endio+0x58/0x90
[ 1356.839015] [<ffffffff813793ea>] blk_update_request+0x8a/0x320
[ 1356.839019] [<ffffffff81552114>] scsi_end_request+0x34/0x1d0
[ 1356.839021] [<ffffffff8155464e>] scsi_io_completion+0xfe/0x600
[ 1356.839024] [<ffffffff810ac89e>] ? enqueue_entity+0x49e/0xcb0
[ 1356.839027] [<ffffffff8154b88f>] scsi_finish_command+0xcf/0x120
[ 1356.839029] [<ffffffff81553e76>] scsi_softirq_done+0x126/0x150
[ 1356.839032] [<ffffffff8137fc7c>] blk_done_softirq+0x7c/0x90
[ 1356.839034] [<ffffffff8107b3d2>] __do_softirq+0xd2/0x250
[ 1356.839036] [<ffffffff8107b785>] irq_exit+0x95/0xa0
[ 1356.839039] [<ffffffff8104a8f5>] smp_call_function_single_interrupt+0x35/0x40
[ 1356.839042] [<ffffffff817bbddb>] call_function_single_interrupt+0x6b/0x70
[ 1356.839043] <EOI> [<ffffffff8101ef09>] ? mwait_idle+0xb9/0x150
[ 1356.839049] [<ffffffff8101f45f>] arch_cpu_idle+0xf/0x20
[ 1356.839051] [<ffffffff810b769b>] default_idle_call+0x3b/0x50
[ 1356.839052] [<ffffffff810b79de>] cpu_startup_entry+0x2be/0x330
[ 1356.839054] [<ffffffff8104b1a5>] start_secondary+0x175/0x1a0
[ 1356.839056] ---[ end trace ee2f11df6ad0b827 ]---
ProblemType: Bug
DistroRelease: elementary OS 0.3.2
Package: linux-image-4.2.0-21-generic 4.2.0-21.25~14.04.1 [origin: Ubuntu]
ProcVersionSignature: Ubuntu 4.2.0-21.25~14.04.1-generic 4.2.6
Uname: Linux 4.2.0-21-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Dec 21 11:51:27 2015
InstallationDate: Installed on 2015-09-22 (90 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
SourcePackage: linux-lts-wily
UpgradeStatus: No upgrade log present (probably fresh install)
---
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
DistroRelease: elementary OS 0.3.2
HibernationDevice: RESUME=UUID=8f157845-797a-4638-a830-e024456ace95
InstallationDate: Installed on 2015-09-22 (90 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
MachineType: Dell Inc. PowerEdge 2950
Package: linux (not installed)
ProcEnviron:
LANGUAGE=de_DE
TERM=xterm
PATH=(custom, no user)
LANG=de_DE.UTF-8
SHELL=/bin/bash
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.2.0-21-generic root=UUID=8abc8460-a790-4cff-b008-1e7f283088a0 ro rootflags=subvol=@ quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 4.2.0-21.25~14.04.1-generic 4.2.6
PulseList:
Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-4.2.0-21-generic N/A
linux-backports-modules-4.2.0-21-generic N/A
linux-firmware 1.127.19
RfKill:
Tags: freya
Uname: Linux 4.2.0-21-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
_MarkForUpload: True
dmi.bios.date: 10/30/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.7.0
dmi.board.name: 0H603H
dmi.board.vendor: Dell Inc.
dmi.board.version: A06
dmi.chassis.type: 23
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr2.7.0:bd10/30/2010:svnDellInc.:pnPowerEdge2950:pvr:rvnDellInc.:rn0H603H:rvrA06:cvnDellInc.:ct23:cvr:
dmi.product.name: PowerEdge 2950
dmi.sys.vendor: Dell Inc.
[ 579.578508] perf interrupt took too long (2507 > 2500), lowering kernel.
[ 600.236051] INFO: task kworker/u16:1:68 blocked for more than 120 seconds.
[ 600.236060] Not tainted 4.4.0-040400rc6
[ 600.236062] "echo 0 > /proc/sys/
[ 600.236064] kworker/u16:1 D ffff88085b627c30 0 68 2 0x00000000
[ 600.236118] Workqueue: btrfs-qgroup-rescan btrfs_qgroup_
[ 600.236120] ffff88085b627c30 ffff880823eae0e0 ffff88085bfc8000 ffff88085bbc6600
[ 600.236122] ffff88085b628000 ffff8808545351f0 ffff880854535000 ffff8808545351f0
[ 600.236124] 0000000000000001 ffff88085b627c48 ffffffff817f8f55 ffff880857bb01b0
[ 600.236126] Call Trace:
[ 600.236133] [<ffffffff817f8
[ 600.236144] [<ffffffffc03ab
[ 600.236148] [<ffffffff810bf
[ 600.236159] [<ffffffffc03ad
[ 600.236170] [<ffffffffc03ad
[ 600.236183] [<ffffffffc0413
[ 600.236186] [<ffffffff81015
[ 600.236198] [<ffffffffc03de
[ 600.236210] [<ffffffffc03de
[ 600.236213] [<ffffffff81096
[ 600.236215] [<ffffffff81096
[ 600.236217] [<ffffffff81096
[ 600.236219] [<ffffffff8109c
[ 600.236221] [<ffffffff8109c
[ 600.236224] [<ffffffff817fd
[ 600.236226] [<ffffffff8109c
[ 600.236259] INFO: task kworker/u16:8:1575 blocked for more than 120 seconds.
[ 600.236260] Not tainted 4.4.0-040400rc6
[ 600.236261] "echo 0 > /proc/sys/
[ 600.236262] kworker/u16:8 D ffff8808590d7cd0 0 1575 2 0x00000000
[ 600.236277] Workqueue: btrfs-extent-refs btrfs_extent_
[ 600.236278] ffff8808590d7cd0 ffffffff8118ac69 ffff88085bfc8000 ffff88085886f2c0
[ 600.236280] ffff8808590d8000 ffff880856e9e9f0 ffff880856e9e800 ffff880856e9e9f0
[ 600.236282] 0000000000000001 ffff8808590d7ce8 ffffffff817f8f55 ffff880857bb01b0
[ 600.236284] Call Trace:
[ 600.236288] [<ffffffff8118a
[ 600.236290] [<ffffffff817f8
[ 600.236300] [<ffffffffc03ab
[ 600.236302] [<ffffffff810bf
[ 600.236313] [<ffffffffc03ad
[ 600.236324] [<ffffffffc03ad
[ 600.236333] [<ffffffffc0397
[ 600.236345] [<ffffffffc03de
[ 600.236357] ...