After this system hangs.
dmesg log I am get through ssh and root user.
For /home partition used btrfs file system.
[174914.234404] INFO: task btrfs-transacti:753 blocked for more than
120 seconds.
[174914.234408] Not tainted 4.2.0-0.rc8.git0.1.fc23.x86_64+debug #1
[174914.234408] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[174914.234409] btrfs-transacti D ffff8807fe1d76d8 9640 753 2 0x00000080
[174914.234414] ffff8807e2c23a38 0000000000000092 ffff8807e2c23a08
0000000000000000
[174914.234416] ffff8807fa342a40 ffff8807f4f72a40 ffff8807e2c23a58
ffff8807e2c24000
[174914.234418] ffff8801837aab70 ffff8807f4f72a40 ffff8807f4f72a40
ffff8807e2c23a80
[174914.234420] Call Trace:
[174914.234424] [<ffffffff8186ad9e>] schedule+0x3e/0x90
[174914.234440] [<ffffffffa07ac342>] btrfs_tree_read_lock+0x102/0x160 [btrfs]
[174914.234442] [<ffffffff810fbf00>] ? wake_atomic_t_function+0x70/0x70
[174914.234447] [<ffffffffa073f834>]
btrfs_read_lock_root_node+0x34/0x50 [btrfs]
[174914.234451] [<ffffffffa0744bbe>] btrfs_search_slot+0x74e/0xa10 [btrfs]
[174914.234452] [<ffffffff81107edd>] ? mark_held_locks+0x7d/0xb0
[174914.234458] [<ffffffffa076181e>] btrfs_lookup_inode+0x3e/0xc0 [btrfs]
[174914.234460] [<ffffffff811080cd>] ? trace_hardirqs_on+0xd/0x10
[174914.234468] [<ffffffffa07ca0d9>]
__btrfs_update_delayed_inode+0x69/0x210 [btrfs]
[174914.234475] [<ffffffffa07ca7a8>] ?
__btrfs_run_delayed_items+0x528/0x600 [btrfs]
[174914.234477] [<ffffffff811080cd>] ? trace_hardirqs_on+0xd/0x10
[174914.234483] [<ffffffffa07ca7cd>]
__btrfs_run_delayed_items+0x54d/0x600 [btrfs]
[174914.234485] [<ffffffff81026d49>] ? sched_clock+0x9/0x10
[174914.234491] [<ffffffffa07caed3>] btrfs_run_delayed_items+0x13/0x20 [btrfs]
[174914.234498] [<ffffffffa076d213>]
btrfs_commit_transaction+0x2e3/0xc70 [btrfs]
[174914.234504] [<ffffffffa07681a8>] transaction_kthread+0x208/0x270 [btrfs]
[174914.234509] [<ffffffffa0767fa0>] ?
btrfs_cleanup_transaction+0x6e0/0x6e0 [btrfs]
[174914.234511] [<ffffffff810d3694>] kthread+0x104/0x120
[174914.234513] [<ffffffff810d3590>] ? kthread_create_on_node+0x250/0x250
[174914.234515] [<ffffffff81871cdf>] ret_from_fork+0x3f/0x70
[174914.234516] [<ffffffff810d3590>] ? kthread_create_on_node+0x250/0x250
[174914.234517] 2 locks held by btrfs-transacti/753:
[174914.234518] #0: (&fs_info->transaction_kthread_mutex){+.+...},
at: [<ffffffffa0768012>] transaction_kthread+0x72/0x270 [btrfs]
[174914.234525] #1: (&delayed_node->mutex){+.+.-.}, at:
[<ffffffffa07ca7a8>] __btrfs_run_delayed_items+0x528/0x600 [btrfs]
[174914.234554] INFO: task kworker/u16:9:22966 blocked for more than
120 seconds.
[174914.234555] Not tainted 4.2.0-0.rc8.git0.1.fc23.x86_64+debug #1
[174914.234556] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[174914.234556] kworker/u16:9 D ffff8807fe5d76d8 9112 22966 2 0x00000000
[174914.234566] Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs]
[174914.234567] ffff88005e6c7848 0000000000000096 ffff88005e6c7818
0000000000000000
[174914.234569] ffff8807fa360000 ffff8800185caa40 ffff88005e6c7868
ffff88005e6c8000
[174914.234570] ffff8801837aab70 ffff8800185caa40 ffff8800185caa40
ffff88005e6c7890
[174914.234572] Call Trace:
[174914.234574] [<ffffffff8186ad9e>] schedule+0x3e/0x90
[174914.234580] [<ffffffffa07ac342>] btrfs_tree_read_lock+0x102/0x160 [btrfs]
[174914.234582] [<ffffffff810fbf00>] ? wake_atomic_t_function+0x70/0x70
[174914.234586] [<ffffffffa073f834>]
btrfs_read_lock_root_node+0x34/0x50 [btrfs]
[174914.234590] [<ffffffffa0744bbe>] btrfs_search_slot+0x74e/0xa10 [btrfs]
[174914.234591] [<ffffffff811090e9>] ? __lock_acquire+0xcb9/0x1d00
[174914.234597] [<ffffffffa075f8d9>] btrfs_lookup_file_extent+0x49/0x60 [btrfs]
[174914.234604] [<ffffffffa0781ff7>] __btrfs_drop_extents+0x187/0xde0 [btrfs]
[174914.234606] [<ffffffff8124ce1e>] ? kmem_cache_alloc+0x33e/0x360
[174914.234609] [<ffffffffa073f3da>] ? btrfs_alloc_path+0x1a/0x20 [btrfs]
[174914.234615] [<ffffffffa07709e5>]
insert_reserved_file_extent.constprop.62+0xb5/0x310 [btrfs]
[174914.234621] [<ffffffffa076bcbe>] ?
join_transaction.isra.12+0x10e/0x420 [btrfs]
[174914.234627] [<ffffffffa0776caf>]
btrfs_finish_ordered_io+0x2ff/0x650 [btrfs]
[174914.234629] [<ffffffff81026d49>] ? sched_clock+0x9/0x10
[174914.234634] [<ffffffffa0777295>] finish_ordered_fn+0x15/0x20 [btrfs]
[174914.234641] [<ffffffffa07a17b5>]
btrfs_scrubparity_helper+0xf5/0x870 [btrfs]
[174914.234647] [<ffffffffa07a1fbe>] btrfs_endio_write_helper+0xe/0x10 [btrfs]
[174914.234649] [<ffffffff810cc3f2>] process_one_work+0x232/0x840
[174914.234651] [<ffffffff810cc35b>] ? process_one_work+0x19b/0x840
[174914.234653] [<ffffffff811284cd>] ? debug_lockdep_rcu_enabled+0x1d/0x20
[174914.234655] [<ffffffff810ccad5>] ? worker_thread+0xd5/0x450
[174914.234656] [<ffffffff810cca4e>] worker_thread+0x4e/0x450
[174914.234658] [<ffffffff810cca00>] ? process_one_work+0x840/0x840
[174914.234659] [<ffffffff810d3694>] kthread+0x104/0x120
[174914.234661] [<ffffffff810d3590>] ? kthread_create_on_node+0x250/0x250
[174914.234662] [<ffffffff81871cdf>] ret_from_fork+0x3f/0x70
[174914.234664] [<ffffffff810d3590>] ? kthread_create_on_node+0x250/0x250
[174914.234665] 3 locks held by kworker/u16:9/22966:
[174914.234665] #0: ("%s-%s""btrfs", name){.+.+..}, at:
[<ffffffff810cc35b>] process_one_work+0x19b/0x840
[174914.234668] #1: ((&work->normal_work)){+.+...}, at:
[<ffffffff810cc35b>] process_one_work+0x19b/0x840
[174914.234671] #2: (sb_internal#2){.+.+..}, at:
[<ffffffffa076dfbc>] start_transaction+0x41c/0x6c0 [btrfs]
[174914.234679] INFO: task kworker/u16:10:22967 blocked for more than
120 seconds.
[174914.234680] Not tainted 4.2.0-0.rc8.git0.1.fc23.x86_64+debug #1
[174914.234680] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[174914.234681] kworker/u16:10 D ffff8807fe1d76d8 9992 22967 2 0x00000000
[174914.234690] Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs]
[174914.234691] ffff8800741b7848 0000000000000096 ffff8800741b7818
0000000000000000
[174914.234692] ffff880017978000 ffff88001797aa40 ffff8800741b7868
ffff8800741b8000
[174914.234694] ffff8801837aab70 ffff88001797aa40 ffff88001797aa40
ffff8800741b7890
[174914.234696] Call Trace:
[174914.234697] [<ffffffff8186ad9e>] schedule+0x3e/0x90
[174914.234703] [<ffffffffa07ac342>] btrfs_tree_read_lock+0x102/0x160 [btrfs]
[174914.234705] [<ffffffff810fbf00>] ? wake_atomic_t_function+0x70/0x70
[174914.234708] [<ffffffffa073f834>]
btrfs_read_lock_root_node+0x34/0x50 [btrfs]
[174914.234712] [<ffffffffa0744bbe>] btrfs_search_slot+0x74e/0xa10 [btrfs]
[174914.234714] [<ffffffff81107edd>] ? mark_held_locks+0x7d/0xb0
[174914.234719] [<ffffffffa075f8d9>] btrfs_lookup_file_extent+0x49/0x60 [btrfs]
[174914.234725] [<ffffffffa0781ff7>] __btrfs_drop_extents+0x187/0xde0 [btrfs]
[174914.234727] [<ffffffff8124ce1e>] ? kmem_cache_alloc+0x33e/0x360
[174914.234730] [<ffffffffa073f3da>] ? btrfs_alloc_path+0x1a/0x20 [btrfs]
[174914.234736] [<ffffffffa07709e5>]
insert_reserved_file_extent.constprop.62+0xb5/0x310 [btrfs]
[174914.234742] [<ffffffffa076bcbe>] ?
join_transaction.isra.12+0x10e/0x420 [btrfs]
[174914.234747] [<ffffffffa0776caf>]
btrfs_finish_ordered_io+0x2ff/0x650 [btrfs]
[174914.234749] [<ffffffff81026d49>] ? sched_clock+0x9/0x10
[174914.234754] [<ffffffffa0777295>] finish_ordered_fn+0x15/0x20 [btrfs]
[174914.234761] [<ffffffffa07a17b5>]
btrfs_scrubparity_helper+0xf5/0x870 [btrfs]
[174914.234767] [<ffffffffa07a1fbe>] btrfs_endio_write_helper+0xe/0x10 [btrfs]
[174914.234769] [<ffffffff810cc3f2>] process_one_work+0x232/0x840
[174914.234770] [<ffffffff810cc35b>] ? process_one_work+0x19b/0x840
[174914.234772] [<ffffffff811284cd>] ? debug_lockdep_rcu_enabled+0x1d/0x20
[174914.234773] [<ffffffff810ccad5>] ? worker_thread+0xd5/0x450
[174914.234775] [<ffffffff810cca4e>] worker_thread+0x4e/0x450
[174914.234776] [<ffffffff810cca00>] ? process_one_work+0x840/0x840
[174914.234778] [<ffffffff810cca00>] ? process_one_work+0x840/0x840
[174914.234779] [<ffffffff810d3694>] kthread+0x104/0x120
[174914.234781] [<ffffffff810d3590>] ? kthread_create_on_node+0x250/0x250
[174914.234782] [<ffffffff81871cdf>] ret_from_fork+0x3f/0x70
[174914.234784] [<ffffffff810d3590>] ? kthread_create_on_node+0x250/0x250
[174914.234785] 3 locks held by kworker/u16:10/22967:
[174914.234785] #0: ("%s-%s""btrfs", name){.+.+..}, at:
[<ffffffff810cc35b>] process_one_work+0x19b/0x840
[174914.234788] #1: ((&work->normal_work)){+.+...}, at:
[<ffffffff810cc35b>] process_one_work+0x19b/0x840
[174914.234790] #2: (sb_internal#2){.+.+..}, at:
[<ffffffffa076dfbc>] start_transaction+0x41c/0x6c0 [btrfs]
[174914.234798] INFO: task kworker/u16:5:26931 blocked for more than
120 seconds.
[174914.234799] Not tainted 4.2.0-0.rc8.git0.1.fc23.x86_64+debug #1
[174914.234800] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[174914.234801] kworker/u16:5 D ffff8807fdfd76d8 9928 26931 2 0x00000000
[174914.234808] Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs]
[174914.234809] ffff88002bdc7848 0000000000000096 ffff88002bdc7818
0000000000000000
[174914.234811] ffff880762858000 ffff88007fdbd480 ffff88002bdc7868
ffff88002bdc8000
[174914.234812] ffff8801837aab70 ffff88007fdbd480 ffff88007fdbd480
ffff88002bdc7890
[174914.234814] Call Trace:
[174914.234815] [<ffffffff8186ad9e>] schedule+0x3e/0x90
[174914.234821] [<ffffffffa07ac342>] btrfs_tree_read_lock+0x102/0x160 [btrfs]
[174914.234823] [<ffffffff810fbf00>] ? wake_atomic_t_function+0x70/0x70
[174914.234827] [<ffffffffa073f834>]
btrfs_read_lock_root_node+0x34/0x50 [btrfs]
[174914.234830] [<ffffffffa0744bbe>] btrfs_search_slot+0x74e/0xa10 [btrfs]
[174914.234832] [<ffffffff811090e9>] ? __lock_acquire+0xcb9/0x1d00
[174914.234838] [<ffffffffa075f8d9>] btrfs_lookup_file_extent+0x49/0x60 [btrfs]
[174914.234844] [<ffffffffa0781ff7>] __btrfs_drop_extents+0x187/0xde0 [btrfs]
[174914.234845] [<ffffffff8124ce1e>] ? kmem_cache_alloc+0x33e/0x360
[174914.234849] [<ffffffffa073f3da>] ? btrfs_alloc_path+0x1a/0x20 [btrfs]
[174914.234854] [<ffffffffa07709e5>]
insert_reserved_file_extent.constprop.62+0xb5/0x310 [btrfs]
[174914.234860] [<ffffffffa076bcbe>] ?
join_transaction.isra.12+0x10e/0x420 [btrfs]
[174914.234866] [<ffffffffa0776caf>]
btrfs_finish_ordered_io+0x2ff/0x650 [btrfs]
[174914.234867] [<ffffffff81026d49>] ? sched_clock+0x9/0x10
[174914.234873] [<ffffffffa0777295>] finish_ordered_fn+0x15/0x20 [btrfs]
[174914.234879] [<ffffffffa07a17b5>]
btrfs_scrubparity_helper+0xf5/0x870 [btrfs]
[174914.234885] [<ffffffffa07a1fbe>] btrfs_endio_write_helper+0xe/0x10 [btrfs]
[174914.234887] [<ffffffff810cc3f2>] process_one_work+0x232/0x840
[174914.234888] [<ffffffff810cc35b>] ? process_one_work+0x19b/0x840
[174914.234890] [<ffffffff811284cd>] ? debug_lockdep_rcu_enabled+0x1d/0x20
[174914.234892] [<ffffffff810ccad5>] ? worker_thread+0xd5/0x450
[174914.234893] [<ffffffff810cca4e>] worker_thread+0x4e/0x450
[174914.234895] [<ffffffff810cca00>] ? process_one_work+0x840/0x840
[174914.234896] [<ffffffff810d3694>] kthread+0x104/0x120
[174914.234898] [<ffffffff810d3590>] ? kthread_create_on_node+0x250/0x250
[174914.234899] [<ffffffff81871cdf>] ret_from_fork+0x3f/0x70
[174914.234900] [<ffffffff810d3590>] ? kthread_create_on_node+0x250/0x250
[174914.234901] 3 locks held by kworker/u16:5/26931:
[174914.234902] #0: ("%s-%s""btrfs", name){.+.+..}, at:
[<ffffffff810cc35b>] process_one_work+0x19b/0x840
[174914.234905] #1: ((&work->normal_work)){+.+...}, at:
[<ffffffff810cc35b>] process_one_work+0x19b/0x840
[174914.234907] #2: (sb_internal#2){.+.+..}, at:
[<ffffffffa076dfbc>] start_transaction+0x41c/0x6c0 [btrfs]
[174914.234915] INFO: task kworker/u16:8:27357 blocked for more than
120 seconds.
[174914.234916] Not tainted 4.2.0-0.rc8.git0.1.fc23.x86_64+debug #1
[174914.234917] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[174914.234917] kworker/u16:8 D ffff8807fe7d76d8 10216 27357 2 0x00000000
[174914.234925] Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs]
[174914.234926] ffff8800674db848 0000000000000096 ffff8800674db818
0000000000000000
[174914.234927] ffff8807c115d480 ffff88007fffd480 ffff8800674db868
ffff8800674dc000
[174914.234929] ffff8801837aab70 ffff88007fffd480 ffff88007fffd480
ffff8800674db890
[174914.234930] Call Trace:
[174914.234932] [<ffffffff8186ad9e>] schedule+0x3e/0x90
[174914.234938] [<ffffffffa07ac342>] btrfs_tree_read_lock+0x102/0x160 [btrfs]
[174914.234939] [<ffffffff810fbf00>] ? wake_atomic_t_function+0x70/0x70
[174914.234943] [<ffffffffa073f834>]
btrfs_read_lock_root_node+0x34/0x50 [btrfs]
[174914.234947] [<ffffffffa0744bbe>] btrfs_search_slot+0x74e/0xa10 [btrfs]
[174914.234948] [<ffffffff81107edd>] ? mark_held_locks+0x7d/0xb0
[174914.234954] [<ffffffffa075f8d9>] btrfs_lookup_file_extent+0x49/0x60 [btrfs]
[174914.234960] [<ffffffffa0781ff7>] __btrfs_drop_extents+0x187/0xde0 [btrfs]
[174914.234961] [<ffffffff8124ce1e>] ? kmem_cache_alloc+0x33e/0x360
[174914.234965] [<ffffffffa073f3da>] ? btrfs_alloc_path+0x1a/0x20 [btrfs]
[174914.234970] [<ffffffffa07709e5>]
insert_reserved_file_extent.constprop.62+0xb5/0x310 [btrfs]
[174914.234976] [<ffffffffa076bcbe>] ?
join_transaction.isra.12+0x10e/0x420 [btrfs]
[174914.234982] [<ffffffffa0776caf>]
btrfs_finish_ordered_io+0x2ff/0x650 [btrfs]
[174914.234983] [<ffffffff81026d49>] ? sched_clock+0x9/0x10
[174914.234989] [<ffffffffa0777295>] finish_ordered_fn+0x15/0x20 [btrfs]
[174914.234995] [<ffffffffa07a17b5>]
btrfs_scrubparity_helper+0xf5/0x870 [btrfs]
[174914.235001] [<ffffffffa07a1fbe>] btrfs_endio_write_helper+0xe/0x10 [btrfs]
[174914.235003] [<ffffffff810cc3f2>] process_one_work+0x232/0x840
[174914.235004] [<ffffffff810cc35b>] ? process_one_work+0x19b/0x840
[174914.235006] [<ffffffff811284cd>] ? debug_lockdep_rcu_enabled+0x1d/0x20
[174914.235007] [<ffffffff810ccad5>] ? worker_thread+0xd5/0x450
[174914.235009] [<ffffffff810cca4e>] worker_thread+0x4e/0x450
[174914.235011] [<ffffffff810cca00>] ? process_one_work+0x840/0x840
[174914.235012] [<ffffffff810cca00>] ? process_one_work+0x840/0x840
[174914.235013] [<ffffffff810d3694>] kthread+0x104/0x120
[174914.235015] [<ffffffff810d3590>] ? kthread_create_on_node+0x250/0x250
[174914.235016] [<ffffffff81871cdf>] ret_from_fork+0x3f/0x70
[174914.235018] [<ffffffff810d3590>] ? kthread_create_on_node+0x250/0x250
[174914.235019] 3 locks held by kworker/u16:8/27357:
[174914.235019] #0: ("%s-%s""btrfs", name){.+.+..}, at:
[<ffffffff810cc35b>] process_one_work+0x19b/0x840
[174914.235022] #1: ((&work->normal_work)){+.+...}, at:
[<ffffffff810cc35b>] process_one_work+0x19b/0x840
[174914.235025] #2: (sb_internal#2){.+.+..}, at:
[<ffffffffa076dfbc>] start_transaction+0x41c/0x6c0 [btrfs]
[174914.235032] INFO: task kworker/u16:1:29696 blocked for more than
120 seconds.
[174914.235033] Not tainted 4.2.0-0.rc8.git0.1.fc23.x86_64+debug #1
[174914.235034] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[174914.235034] kworker/u16:1 D ffff8807fe9d76d8 8408 29696 2 0x00000000
[174914.235042] Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs]
[174914.235043] ffff88001a8e7848 0000000000000096 ffff88001a8e7818
0000000000000000
[174914.235045] ffff8807b95b0000 ffff88047f6d2a40 ffff88001a8e7868
ffff88001a8e8000
[174914.235046] ffff8801837aab70 ffff88047f6d2a40 ffff88047f6d2a40
ffff88001a8e7890
[174914.235048] Call Trace:
[174914.235049] [<ffffffff8186ad9e>] schedule+0x3e/0x90
[174914.235055] [<ffffffffa07ac342>] btrfs_tree_read_lock+0x102/0x160 [btrfs]
[174914.235056] [<ffffffff810fbf00>] ? wake_atomic_t_function+0x70/0x70
[174914.235060] [<ffffffffa073f834>]
btrfs_read_lock_root_node+0x34/0x50 [btrfs]
[174914.235064] [<ffffffffa0744bbe>] btrfs_search_slot+0x74e/0xa10 [btrfs]
[174914.235066] [<ffffffff81107edd>] ? mark_held_locks+0x7d/0xb0
[174914.235071] [<ffffffffa075f8d9>] btrfs_lookup_file_extent+0x49/0x60 [btrfs]
[174914.235077] [<ffffffffa0781ff7>] __btrfs_drop_extents+0x187/0xde0 [btrfs]
[174914.235078] [<ffffffff8124ce1e>] ? kmem_cache_alloc+0x33e/0x360
[174914.235082] [<ffffffffa073f3da>] ? btrfs_alloc_path+0x1a/0x20 [btrfs]
[174914.235088] [<ffffffffa07709e5>]
insert_reserved_file_extent.constprop.62+0xb5/0x310 [btrfs]
[174914.235093] [<ffffffffa076bcbe>] ?
join_transaction.isra.12+0x10e/0x420 [btrfs]
[174914.235099] [<ffffffffa0776caf>]
btrfs_finish_ordered_io+0x2ff/0x650 [btrfs]
[174914.235100] [<ffffffff81026d49>] ? sched_clock+0x9/0x10
[174914.235106] [<ffffffffa0777295>] finish_ordered_fn+0x15/0x20 [btrfs]
[174914.235112] [<ffffffffa07a17b5>]
btrfs_scrubparity_helper+0xf5/0x870 [btrfs]
[174914.235118] [<ffffffffa07a1fbe>] btrfs_endio_write_helper+0xe/0x10 [btrfs]
[174914.235120] [<ffffffff810cc3f2>] process_one_work+0x232/0x840
[174914.235121] [<ffffffff810cc35b>] ? process_one_work+0x19b/0x840
[174914.235123] [<ffffffff811284cd>] ? debug_lockdep_rcu_enabled+0x1d/0x20
[174914.235124] [<ffffffff810ccad5>] ? worker_thread+0xd5/0x450
[174914.235126] [<ffffffff810cca4e>] worker_thread+0x4e/0x450
[174914.235127] [<ffffffff810cca00>] ? process_one_work+0x840/0x840
[174914.235129] [<ffffffff810cca00>] ? process_one_work+0x840/0x840
[174914.235130] [<ffffffff810d3694>] kthread+0x104/0x120
[174914.235132] [<ffffffff810d3590>] ? kthread_create_on_node+0x250/0x250
[174914.235133] [<ffffffff81871cdf>] ret_from_fork+0x3f/0x70
[174914.235134] [<ffffffff810d3590>] ? kthread_create_on_node+0x250/0x250
[174914.235135] 3 locks held by kworker/u16:1/29696:
[174914.235136] #0: ("%s-%s""btrfs", name){.+.+..}, at:
[<ffffffff810cc35b>] process_one_work+0x19b/0x840
[174914.235139] #1: ((&work->normal_work)){+.+...}, at:
[<ffffffff810cc35b>] process_one_work+0x19b/0x840
[174914.235141] #2: (sb_internal#2){.+.+..}, at:
[<ffffffffa076dfbc>] start_transaction+0x41c/0x6c0 [btrfs]
[174914.235149] INFO: task kworker/u16:4:30149 blocked for more than
120 seconds.
[174914.235149] Not tainted 4.2.0-0.rc8.git0.1.fc23.x86_64+debug #1
[174914.235150] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[174914.235151] kworker/u16:4 D ffff8807fe1d76d8 10584 30149 2 0x00000000
[174914.235159] Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs]
[174914.235159] ffff8800674cb848 0000000000000096 ffff8800674cb818
0000000000000000
[174914.235161] ffff8807fa342a40 ffff8800747f2a40 ffff8800674cb868
ffff8800674cc000
[174914.235163] ffff8801837aab70 ffff8800747f2a40 ffff8800747f2a40
ffff8800674cb890
[174914.235164] Call Trace:
[174914.235165] [<ffffffff8186ad9e>] schedule+0x3e/0x90
[174914.235172] [<ffffffffa07ac342>] btrfs_tree_read_lock+0x102/0x160 [btrfs]
[174914.235173] [<ffffffff810fbf00>] ? wake_atomic_t_function+0x70/0x70
[174914.235177] [<ffffffffa073f834>]
btrfs_read_lock_root_node+0x34/0x50 [btrfs]
[174914.235181] [<ffffffffa0744bbe>] btrfs_search_slot+0x74e/0xa10 [btrfs]
[174914.235182] [<ffffffff811090e9>] ? __lock_acquire+0xcb9/0x1d00
[174914.235188] [<ffffffffa075f8d9>] btrfs_lookup_file_extent+0x49/0x60 [btrfs]
[174914.235194] [<ffffffffa0781ff7>] __btrfs_drop_extents+0x187/0xde0 [btrfs]
[174914.235195] [<ffffffff8124ce1e>] ? kmem_cache_alloc+0x33e/0x360
[174914.235199] [<ffffffffa073f3da>] ? btrfs_alloc_path+0x1a/0x20 [btrfs]
[174914.235205] [<ffffffffa07709e5>]
insert_reserved_file_extent.constprop.62+0xb5/0x310 [btrfs]
[174914.235210] [<ffffffffa076bcbe>] ?
join_transaction.isra.12+0x10e/0x420 [btrfs]
[174914.235216] [<ffffffffa0776caf>]
btrfs_finish_ordered_io+0x2ff/0x650 [btrfs]
[174914.235217] [<ffffffff81026d49>] ? sched_clock+0x9/0x10
[174914.235223] [<ffffffffa0777295>] finish_ordered_fn+0x15/0x20 [btrfs]
[174914.235229] [<ffffffffa07a17b5>]
btrfs_scrubparity_helper+0xf5/0x870 [btrfs]
[174914.235235] [<ffffffffa07a1fbe>] btrfs_endio_write_helper+0xe/0x10 [btrfs]
[174914.235237] [<ffffffff810cc3f2>] process_one_work+0x232/0x840
[174914.235238] [<ffffffff810cc35b>] ? process_one_work+0x19b/0x840
[174914.235240] [<ffffffff811284cd>] ? debug_lockdep_rcu_enabled+0x1d/0x20
[174914.235241] [<ffffffff810ccad5>] ? worker_thread+0xd5/0x450
[174914.235243] [<ffffffff810cca4e>] worker_thread+0x4e/0x450
[174914.235244] [<ffffffff810cca00>] ? process_one_work+0x840/0x840
[174914.235246] [<ffffffff810d3694>] kthread+0x104/0x120
[174914.235247] [<ffffffff810d3590>] ? kthread_create_on_node+0x250/0x250
[174914.235249] [<ffffffff81871cdf>] ret_from_fork+0x3f/0x70
[174914.235250] [<ffffffff810d3590>] ? kthread_create_on_node+0x250/0x250
[174914.235251] 3 locks held by kworker/u16:4/30149:
[174914.235252] #0: ("%s-%s""btrfs", name){.+.+..}, at:
[<ffffffff810cc35b>] process_one_work+0x19b/0x840
[174914.235254] #1: ((&work->normal_work)){+.+...}, at:
[<ffffffff810cc35b>] process_one_work+0x19b/0x840
[174914.235257] #2: (sb_internal#2){.+.+..}, at:
[<ffffffffa076dfbc>] start_transaction+0x41c/0x6c0 [btrfs]
[174914.235278] INFO: task tracker-store:32128 blocked for more than
120 seconds.
[174914.235279] Not tainted 4.2.0-0.rc8.git0.1.fc23.x86_64+debug #1
[174914.235280] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[174914.235280] tracker-store D ffff8807fe9d76d8 11224 32128 1 0x00000000
[174914.235284] ffff88064afdf6b8 0000000000000096 ffff88064afdf688
0000000000000000
[174914.235285] ffff880018f88000 ffff8807f51a8000 ffff88064afdf6d8
ffff88064afe0000
[174914.235287] ffff8801837aab70 ffff8807f51a8000 ffff8807f51a8000
ffff88064afdf700
[174914.235288] Call Trace:
[174914.235290] [<ffffffff8186ad9e>] schedule+0x3e/0x90
[174914.235296] [<ffffffffa07ac342>] btrfs_tree_read_lock+0x102/0x160 [btrfs]
[174914.235297] [<ffffffff810fbf00>] ? wake_atomic_t_function+0x70/0x70
[174914.235301] [<ffffffffa073f834>]
btrfs_read_lock_root_node+0x34/0x50 [btrfs]
[174914.235305] [<ffffffffa0744bbe>] btrfs_search_slot+0x74e/0xa10 [btrfs]
[174914.235311] [<ffffffffa075f8d9>] btrfs_lookup_file_extent+0x49/0x60 [btrfs]
[174914.235316] [<ffffffffa077229b>] btrfs_get_extent+0x16b/0xc40 [btrfs]
[174914.235318] [<ffffffff811090e9>] ? __lock_acquire+0xcb9/0x1d00
[174914.235319] [<ffffffff81870dab>] ? _raw_spin_unlock+0x2b/0x40
[174914.235326] [<ffffffffa078c918>] ? __set_extent_bit+0x3e8/0x530 [btrfs]
[174914.235333] [<ffffffffa0790bfd>] __do_readpage+0x19d/0x890 [btrfs]
[174914.235339] [<ffffffffa0772130>] ?
btrfs_writepage_end_io_hook+0x300/0x300 [btrfs]
[174914.235366] [<ffffffffa0791696>]
__extent_readpages.constprop.41+0x2b6/0x2d0 [btrfs]
[174914.235375] [<ffffffffa0772130>] ?
btrfs_writepage_end_io_hook+0x300/0x300 [btrfs]
[174914.235383] [<ffffffffa0791d2b>] extent_readpages+0x1bb/0x1d0 [btrfs]
[174914.235391] [<ffffffffa0772130>] ?
btrfs_writepage_end_io_hook+0x300/0x300 [btrfs]
[174914.235394] [<ffffffff811e1c45>] ? __page_cache_alloc+0x135/0x150
[174914.235395] [<ffffffff81026d49>] ? sched_clock+0x9/0x10
[174914.235397] [<ffffffff811e1c45>] ? __page_cache_alloc+0x135/0x150
[174914.235405] [<ffffffffa076fa5f>] btrfs_readpages+0x1f/0x30 [btrfs]
[174914.235407] [<ffffffff811f400f>] __do_page_cache_readahead+0x2af/0x330
[174914.235409] [<ffffffff811f3edd>] ? __do_page_cache_readahead+0x17d/0x330
[174914.235411] [<ffffffff81026cd8>] ? native_sched_clock+0x28/0x90
[174914.235413] [<ffffffff811f42fb>] ondemand_readahead+0x26b/0x460
[174914.235414] [<ffffffff811f41d7>] ? ondemand_readahead+0x147/0x460
[174914.235416] [<ffffffff811f4611>] page_cache_sync_readahead+0x31/0x50
[174914.235418] [<ffffffff811e429e>] generic_file_read_iter+0x4fe/0x610
[174914.235420] [<ffffffff81107edd>] ? mark_held_locks+0x7d/0xb0
[174914.235424] [<ffffffff8126faac>] __vfs_read+0xcc/0x100
[174914.235426] [<ffffffff812703ca>] vfs_read+0x8a/0x140
[174914.235427] [<ffffffff81271178>] SyS_read+0x58/0xd0
[174914.235429] [<ffffffff818718ae>] entry_SYSCALL_64_fastpath+0x12/0x76
[174914.235431] [<ffffffff8187188b>] ? entry_SYSCALL_64_after_swapgs+0x38/0x49
[174914.235433] 1 lock held by tracker-store/32128:
[174914.235433] #0: (&f->f_pos_lock){+.+.+.}, at:
[<ffffffff81292d09>] __fdget_pos+0x49/0x50
[174914.235453] INFO: task htop:32453 blocked for more than 120 seconds.
[174914.235454] Not tainted 4.2.0-0.rc8.git0.1.fc23.x86_64+debug #1
[174914.235455] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[174914.235456] htop D ffff8807fe7d76d8 12216 32453 32417 0x00000000
[174914.235460] ffff8805fe88fc80 0000000000000082 ffffffff81870e30
ffffffff00000000
[174914.235462] ffff8807fa362a40 ffff88010ee0d480 ffff8805fe88fc70
ffff8805fe890000
[174914.235465] ffff8807f5306930 ffffffffffffffff ffff8807f5306948
ffff8807f5306880
[174914.235467] Call Trace:
[174914.235469] [<ffffffff81870e30>] ? _raw_spin_unlock_irq+0x30/0x50
[174914.235470] [<ffffffff8186ad9e>] schedule+0x3e/0x90
[174914.235472] [<ffffffff8186f267>] rwsem_down_read_failed+0xc7/0x130
[174914.235474] [<ffffffff81026cd8>] ? native_sched_clock+0x28/0x90
[174914.235477] [<ffffffff8142e5f4>] call_rwsem_down_read_failed+0x14/0x30
[174914.235478] [<ffffffff8186eab3>] ? down_read+0x83/0xa0
[174914.235481] [<ffffffff812ecdc1>] ? proc_pid_cmdline_read+0xb1/0x570
[174914.235483] [<ffffffff812ecdc1>] proc_pid_cmdline_read+0xb1/0x570
[174914.235485] [<ffffffff81108039>] ? trace_hardirqs_on_caller+0x129/0x1b0
[174914.235487] [<ffffffff811080cd>] ? trace_hardirqs_on+0xd/0x10
[174914.235489] [<ffffffff8126fa17>] __vfs_read+0x37/0x100
[174914.235492] [<ffffffff813980e3>] ? security_file_permission+0xa3/0xc0
[174914.235494] [<ffffffff812703ca>] vfs_read+0x8a/0x140
[174914.235495] [<ffffffff81271178>] SyS_read+0x58/0xd0
[174914.235497] [<ffffffff818718ae>] entry_SYSCALL_64_fastpath+0x12/0x76
[174914.235499] 1 lock held by htop/32453:
[174914.235500] #0: (&mm->mmap_sem){++++++}, at:
[<ffffffff812ecdc1>] proc_pid_cmdline_read+0xb1/0x570
[174914.235508] INFO: task Cache2 I/O:32596 blocked for more than 120 seconds.
[174914.235509] Not tainted 4.2.0-0.rc8.git0.1.fc23.x86_64+debug #1
[174914.235510] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[174914.235510] Cache2 I/O D ffff8807fe9d76d8 11416 32596 32516 0x00000000
[174914.235514] ffff8807107636b8 0000000000000096 ffff880710763688
0000000000000000
[174914.235516] ffff8807b95b0000 ffff8807482f0000 ffff8807107636d8
ffff880710764000
[174914.235519] ffff8801837aab70 ffff8807482f0000 ffff8807482f0000
ffff880710763700
[174914.235521] Call Trace:
[174914.235523] [<ffffffff8186ad9e>] schedule+0x3e/0x90
[174914.235532] [<ffffffffa07ac342>] btrfs_tree_read_lock+0x102/0x160 [btrfs]
[174914.235534] [<ffffffff810fbf00>] ? wake_atomic_t_function+0x70/0x70
[174914.235539] [<ffffffffa073f834>]
btrfs_read_lock_root_node+0x34/0x50 [btrfs]
[174914.235545] [<ffffffffa0744bbe>] btrfs_search_slot+0x74e/0xa10 [btrfs]
[174914.235553] [<ffffffffa075f8d9>] btrfs_lookup_file_extent+0x49/0x60 [btrfs]
[174914.235571] [<ffffffffa077229b>] btrfs_get_extent+0x16b/0xc40 [btrfs]
[174914.235573] [<ffffffff811090e9>] ? __lock_acquire+0xcb9/0x1d00
[174914.235575] [<ffffffff81870dab>] ? _raw_spin_unlock+0x2b/0x40
[174914.235584] [<ffffffffa078c8dc>] ? __set_extent_bit+0x3ac/0x530 [btrfs]
[174914.235603] [<ffffffffa0790bfd>] __do_readpage+0x19d/0x890 [btrfs]
[174914.235610] [<ffffffffa0772130>] ?
btrfs_writepage_end_io_hook+0x300/0x300 [btrfs]
[174914.235618] [<ffffffffa0791696>]
__extent_readpages.constprop.41+0x2b6/0x2d0 [btrfs]
[174914.235625] [<ffffffffa0772130>] ?
btrfs_writepage_end_io_hook+0x300/0x300 [btrfs]
[174914.235633] [<ffffffffa0791d2b>] extent_readpages+0x1bb/0x1d0 [btrfs]
[174914.235640] [<ffffffffa0772130>] ?
btrfs_writepage_end_io_hook+0x300/0x300 [btrfs]
[174914.235642] [<ffffffff81026d49>] ? sched_clock+0x9/0x10
[174914.235644] [<ffffffff811e1c45>] ? __page_cache_alloc+0x135/0x150
[174914.235661] [<ffffffffa076fa5f>] btrfs_readpages+0x1f/0x30 [btrfs]
[174914.235663] [<ffffffff811f400f>] __do_page_cache_readahead+0x2af/0x330
[174914.235664] [<ffffffff811f3edd>] ? __do_page_cache_readahead+0x17d/0x330
[174914.235666] [<ffffffff81026cd8>] ? native_sched_clock+0x28/0x90
[174914.235669] [<ffffffff811f42fb>] ondemand_readahead+0x26b/0x460
[174914.235670] [<ffffffff811f41d7>] ? ondemand_readahead+0x147/0x460
[174914.235672] [<ffffffff811f4611>] page_cache_sync_readahead+0x31/0x50
[174914.235674] [<ffffffff811e429e>] generic_file_read_iter+0x4fe/0x610
[174914.235676] [<ffffffff81107edd>] ? mark_held_locks+0x7d/0xb0
[174914.235678] [<ffffffff8126faac>] __vfs_read+0xcc/0x100
[174914.235680] [<ffffffff812703ca>] vfs_read+0x8a/0x140
[174914.235681] [<ffffffff81271178>] SyS_read+0x58/0xd0
[174914.235683] [<ffffffff818718ae>] entry_SYSCALL_64_fastpath+0x12/0x76
[174914.235685] 1 lock held by Cache2 I/O/32596:
[174914.235686] #0: (&f->f_pos_lock){+.+.+.}, at:
[<ffffffff81292d09>] __fdget_pos+0x49/0x50
$ btrfs --version
btrfs-progs v4.1.2
--
Best Regards,
Mike Gavrilov.
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