[ 579.578508] perf interrupt took too long (2507 > 2500), lowering kernel.perf_event_max_sample_rate to 50000 [ 600.236051] INFO: task kworker/u16:1:68 blocked for more than 120 seconds. [ 600.236060] Not tainted 4.4.0-040400rc6-generic #201512202030 [ 600.236062] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 600.236064] kworker/u16:1 D ffff88085b627c30 0 68 2 0x00000000 [ 600.236118] Workqueue: btrfs-qgroup-rescan btrfs_qgroup_rescan_helper [btrfs] [ 600.236120] ffff88085b627c30 ffff880823eae0e0 ffff88085bfc8000 ffff88085bbc6600 [ 600.236122] ffff88085b628000 ffff8808545351f0 ffff880854535000 ffff8808545351f0 [ 600.236124] 0000000000000001 ffff88085b627c48 ffffffff817f8f55 ffff880857bb01b0 [ 600.236126] Call Trace: [ 600.236133] [<ffffffff817f8f55>] schedule+0x35/0x80 [ 600.236144] [<ffffffffc03abb73>] wait_current_trans.isra.21+0xd3/0x120 [btrfs] [ 600.236148] [<ffffffff810bfec0>] ? wake_atomic_t_function+0x60/0x60 [ 600.236159] [<ffffffffc03ad44b>] start_transaction+0x2cb/0x4a0 [btrfs] [ 600.236170] [<ffffffffc03ad638>] btrfs_start_transaction+0x18/0x20 [btrfs] [ 600.236183] [<ffffffffc0413c18>] btrfs_qgroup_rescan_worker+0x88/0x550 [btrfs] [ 600.236186] [<ffffffff8101566c>] ? __switch_to+0x1dc/0x5a0 [ 600.236198] [<ffffffffc03de70a>] btrfs_scrubparity_helper+0xca/0x290 [btrfs] [ 600.236210] [<ffffffffc03de91e>] btrfs_qgroup_rescan_helper+0xe/0x10 [btrfs] [ 600.236213] [<ffffffff8109687a>] process_one_work+0x1aa/0x440 [ 600.236215] [<ffffffff81096b5b>] worker_thread+0x4b/0x4c0 [ 600.236217] [<ffffffff81096b10>] ? process_one_work+0x440/0x440 [ 600.236219] [<ffffffff8109ccd8>] kthread+0xd8/0xf0 [ 600.236221] [<ffffffff8109cc00>] ? kthread_create_on_node+0x1a0/0x1a0 [ 600.236224] [<ffffffff817fd38f>] ret_from_fork+0x3f/0x70 [ 600.236226] [<ffffffff8109cc00>] ? kthread_create_on_node+0x1a0/0x1a0 [ 600.236259] INFO: task kworker/u16:8:1575 blocked for more than 120 seconds. [ 600.236260] Not tainted 4.4.0-040400rc6-generic #201512202030 [ 600.236261] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 600.236262] kworker/u16:8 D ffff8808590d7cd0 0 1575 2 0x00000000 [ 600.236277] Workqueue: btrfs-extent-refs btrfs_extent_refs_helper [btrfs] [ 600.236278] ffff8808590d7cd0 ffffffff8118ac69 ffff88085bfc8000 ffff88085886f2c0 [ 600.236280] ffff8808590d8000 ffff880856e9e9f0 ffff880856e9e800 ffff880856e9e9f0 [ 600.236282] 0000000000000001 ffff8808590d7ce8 ffffffff817f8f55 ffff880857bb01b0 [ 600.236284] Call Trace: [ 600.236288] [<ffffffff8118ac69>] ? mempool_free+0x29/0x80 [ 600.236290] [<ffffffff817f8f55>] schedule+0x35/0x80 [ 600.236300] [<ffffffffc03abb73>] wait_current_trans.isra.21+0xd3/0x120 [btrfs] [ 600.236302] [<ffffffff810bfec0>] ? wake_atomic_t_function+0x60/0x60 [ 600.236313] [<ffffffffc03ad3fb>] start_transaction+0x27b/0x4a0 [btrfs] [ 600.236324] [<ffffffffc03ad677>] btrfs_join_transaction+0x17/0x20 [btrfs] [ 600.236333] [<ffffffffc0397988>] delayed_ref_async_start+0x18/0x90 [btrfs] [ 600.236345] [<ffffffffc03de70a>] btrfs_scrubparity_helper+0xca/0x290 [btrfs] [ 600.236357] [<ffffffffc03de90e>] btrfs_extent_refs_helper+0xe/0x10 [btrfs] [ 600.236359] [<ffffffff8109687a>] process_one_work+0x1aa/0x440 [ 600.236361] [<ffffffff81096b5b>] worker_thread+0x4b/0x4c0 [ 600.236362] [<ffffffff81096b10>] ? process_one_work+0x440/0x440 [ 600.236364] [<ffffffff81096b10>] ? process_one_work+0x440/0x440 [ 600.236366] [<ffffffff8109ccd8>] kthread+0xd8/0xf0 [ 600.236368] [<ffffffff8109cc00>] ? kthread_create_on_node+0x1a0/0x1a0 [ 600.236369] [<ffffffff817fd38f>] ret_from_fork+0x3f/0x70 [ 600.236371] [<ffffffff8109cc00>] ? kthread_create_on_node+0x1a0/0x1a0 [ 600.236413] INFO: task btrfs-cleaner:2912 blocked for more than 120 seconds. [ 600.236414] Not tainted 4.4.0-040400rc6-generic #201512202030 [ 600.236415] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 600.236416] btrfs-cleaner D ffff88081d1ebc08 0 2912 2 0x00000000 [ 600.236419] ffff88081d1ebc08 ffffffff810ad7a7 ffff88085bfccc80 ffff880826c80000 [ 600.236421] ffff88081d1ec000 ffff880834e10920 ffff880834e10918 ffff880826c80000 [ 600.236422] ffff880859689500 ffff88081d1ebc20 ffffffff817f8f55 7fffffffffffffff [ 600.236424] Call Trace: [ 600.236427] [<ffffffff810ad7a7>] ? sched_clock_local+0x17/0x80 [ 600.236429] [<ffffffff817f8f55>] schedule+0x35/0x80 [ 600.236431] [<ffffffff817fc049>] schedule_timeout+0x189/0x250 [ 600.236433] [<ffffffff810a83a5>] ? wake_up_process+0x15/0x20 [ 600.236434] [<ffffffff81094901>] ? insert_work+0x81/0xc0 [ 600.236436] [<ffffffff810a8067>] ? try_to_wake_up+0x47/0x370 [ 600.236438] [<ffffffff817f99b3>] wait_for_completion+0xb3/0x140 [ 600.236439] [<ffffffff810a8420>] ? wake_up_q+0x70/0x70 [ 600.236449] [<ffffffffc0391c17>] btrfs_async_run_delayed_refs+0x127/0x150 [btrfs] [ 600.236460] [<ffffffffc03ad927>] __btrfs_end_transaction+0x1f7/0x340 [btrfs] [ 600.236471] [<ffffffffc03ade93>] btrfs_end_transaction_throttle+0x13/0x20 [btrfs] [ 600.236481] [<ffffffffc0395fb9>] btrfs_drop_snapshot+0x539/0x830 [btrfs] [ 600.236492] [<ffffffffc03ac672>] btrfs_clean_one_deleted_snapshot+0xb2/0x100 [btrfs] [ 600.236502] [<ffffffffc03a4ffe>] cleaner_kthread+0xae/0x200 [btrfs] [ 600.236512] [<ffffffffc03a4f50>] ? check_leaf+0x360/0x360 [btrfs] [ 600.236514] [<ffffffff8109ccd8>] kthread+0xd8/0xf0 [ 600.236516] [<ffffffff8109cc00>] ? kthread_create_on_node+0x1a0/0x1a0 [ 600.236518] [<ffffffff817fd38f>] ret_from_fork+0x3f/0x70 [ 600.236520] [<ffffffff8109cc00>] ? kthread_create_on_node+0x1a0/0x1a0 [ 600.236522] INFO: task btrfs:2967 blocked for more than 120 seconds. [ 600.236523] Not tainted 4.4.0-040400rc6-generic #201512202030 [ 600.236524] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 600.236525] btrfs D ffff88081a8d7af8 0 2967 1974 0x00000000 [ 600.236527] ffff88081a8d7af8 ffffffff810a8420 ffff88085bfccc80 ffff880834c0a640 [ 600.236529] ffff88081a8d8000 ffff880857bb0230 ffff88082ad10200 000000000006e615 [ 600.236531] ffff88082916e360 ffff88081a8d7b10 ffffffff817f8f55 ffff880857bb01b0 [ 600.236533] Call Trace: [ 600.236535] [<ffffffff810a8420>] ? wake_up_q+0x70/0x70 [ 600.236536] [<ffffffff817f8f55>] schedule+0x35/0x80 [ 600.236547] [<ffffffffc03ab972>] wait_for_commit.isra.16+0x52/0xa0 [btrfs] [ 600.236549] [<ffffffff810bfec0>] ? wake_atomic_t_function+0x60/0x60 [ 600.236560] [<ffffffffc03ac0e5>] btrfs_wait_for_commit+0x145/0x170 [btrfs] [ 600.236570] [<ffffffffc039b257>] btrfs_inc_block_group_ro+0x67/0x1b0 [btrfs] [ 600.236581] [<ffffffffc040a2df>] scrub_enumerate_chunks+0x21f/0x580 [btrfs] [ 600.236583] [<ffffffff810bfe00>] ? prepare_to_wait_event+0x90/0xf0 [ 600.236596] [<ffffffffc040b95c>] btrfs_scrub_dev+0x1bc/0x530 [btrfs] [ 600.236608] [<ffffffffc03e5ff7>] ? btrfs_ioctl+0xdf7/0x2850 [btrfs] [ 600.236611] [<ffffffff812265f6>] ? __mnt_want_write+0x56/0x60 [ 600.236623] [<ffffffffc03e6c97>] btrfs_ioctl+0x1a97/0x2850 [btrfs] [ 600.236625] [<ffffffff810ad976>] ? sched_clock_cpu+0x46/0xa0 [ 600.236627] [<ffffffff810a74d4>] ? check_preempt_curr+0x54/0x90 [ 600.236628] [<ffffffff810a7529>] ? ttwu_do_wakeup+0x19/0xc0 [ 600.236630] [<ffffffff810a766d>] ? ttwu_do_activate.constprop.89+0x5d/0x70 [ 600.236631] [<ffffffff810a8067>] ? try_to_wake_up+0x47/0x370 [ 600.236633] [<ffffffff810a83a5>] ? wake_up_process+0x15/0x20 [ 600.236635] [<ffffffff810c7ffd>] ? __rwsem_do_wake+0x10d/0x140 [ 600.236638] [<ffffffff811e55cb>] ? kmem_cache_alloc_node+0xbb/0x1f0 [ 600.236642] [<ffffffff8139f2c3>] ? create_task_io_context+0x23/0x100 [ 600.236645] [<ffffffff812192a8>] do_vfs_ioctl+0x298/0x480 [ 600.236647] [<ffffffff8139f3e6>] ? get_task_io_context+0x46/0x90 [ 600.236650] [<ffffffff813ad98c>] ? set_task_ioprio+0x8c/0xa0 [ 600.236652] [<ffffffff81219509>] SyS_ioctl+0x79/0x90 [ 600.236654] [<ffffffff817fcff6>] entry_SYSCALL_64_fastpath+0x16/0x75 [ 600.236656] INFO: task btrfs:2968 blocked for more than 120 seconds. [ 600.236657] Not tainted 4.4.0-040400rc6-generic #201512202030 [ 600.236658] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 600.236659] btrfs D ffff88081a863af8 0 2968 1974 0x00000000 [ 600.236661] ffff88081a863af8 ffffffff810a8420 ffff88085bfc9980 ffff880834c0f2c0 [ 600.236663] ffff88081a864000 ffff880857bb0230 ffff88082ad11000 000000000006e615 [ 600.236665] ffff880857b8f510 ffff88081a863b10 ffffffff817f8f55 ffff880857bb01b0 [ 600.236667] Call Trace: [ 600.236668] [<ffffffff810a8420>] ? wake_up_q+0x70/0x70 [ 600.236670] [<ffffffff817f8f55>] schedule+0x35/0x80 [ 600.236680] [<ffffffffc03ab972>] wait_for_commit.isra.16+0x52/0xa0 [btrfs] [ 600.236682] [<ffffffff810bfec0>] ? wake_atomic_t_function+0x60/0x60 [ 600.236693] [<ffffffffc03ac0e5>] btrfs_wait_for_commit+0x145/0x170 [btrfs] [ 600.236703] [<ffffffffc039b257>] btrfs_inc_block_group_ro+0x67/0x1b0 [btrfs] [ 600.236714] [<ffffffffc040a2df>] scrub_enumerate_chunks+0x21f/0x580 [btrfs] [ 600.236716] [<ffffffff810bfe00>] ? prepare_to_wait_event+0x90/0xf0 [ 600.236728] [<ffffffffc040b95c>] btrfs_scrub_dev+0x1bc/0x530 [btrfs] [ 600.236740] [<ffffffffc03e5ff7>] ? btrfs_ioctl+0xdf7/0x2850 [btrfs] [ 600.236742] [<ffffffff812265f6>] ? __mnt_want_write+0x56/0x60 [ 600.236754] [<ffffffffc03e6c97>] btrfs_ioctl+0x1a97/0x2850 [btrfs] [ 600.236756] [<ffffffff811e55cb>] ? kmem_cache_alloc_node+0xbb/0x1f0 [ 600.236758] [<ffffffff8139f2c3>] ? create_task_io_context+0x23/0x100 [ 600.236760] [<ffffffff812192a8>] do_vfs_ioctl+0x298/0x480 [ 600.236761] [<ffffffff8139f3e6>] ? get_task_io_context+0x46/0x90 [ 600.236763] [<ffffffff813ad98c>] ? set_task_ioprio+0x8c/0xa0 [ 600.236765] [<ffffffff81219509>] SyS_ioctl+0x79/0x90 [ 600.236767] [<ffffffff817fcff6>] entry_SYSCALL_64_fastpath+0x16/0x75 [ 600.236769] INFO: task btrfs:2969 blocked for more than 120 seconds. [ 600.236770] Not tainted 4.4.0-040400rc6-generic #201512202030 [ 600.236771] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 600.236772] btrfs D ffff88081a867af8 0 2969 1974 0x00000000 [ 600.236774] ffff88081a867af8 ffffffff810a8420 ffffffff81e11500 ffff880826c4b300 [ 600.236776] ffff88081a868000 ffff880857bb0230 ffff88082ad11000 000000000006e615 [ 600.236778] ffff88081ba6d510 ffff88081a867b10 ffffffff817f8f55 ffff880857bb01b0 [ 600.236780] Call Trace: [ 600.236782] [<ffffffff810a8420>] ? wake_up_q+0x70/0x70 [ 600.236783] [<ffffffff817f8f55>] schedule+0x35/0x80 [ 600.236794] [<ffffffffc03ab972>] wait_for_commit.isra.16+0x52/0xa0 [btrfs] [ 600.236796] [<ffffffff810bfec0>] ? wake_atomic_t_function+0x60/0x60 [ 600.236806] [<ffffffffc03ac0e5>] btrfs_wait_for_commit+0x145/0x170 [btrfs] [ 600.236816] [<ffffffffc039b257>] btrfs_inc_block_group_ro+0x67/0x1b0 [btrfs] [ 600.236828] [<ffffffffc040a2df>] scrub_enumerate_chunks+0x21f/0x580 [btrfs] [ 600.236830] [<ffffffff810bfe00>] ? prepare_to_wait_event+0x90/0xf0 [ 600.236841] [<ffffffffc040b95c>] btrfs_scrub_dev+0x1bc/0x530 [btrfs] [ 600.236853] [<ffffffffc03e5ff7>] ? btrfs_ioctl+0xdf7/0x2850 [btrfs] [ 600.236855] [<ffffffff812265f6>] ? __mnt_want_write+0x56/0x60 [ 600.236867] [<ffffffffc03e6c97>] btrfs_ioctl+0x1a97/0x2850 [btrfs] [ 600.236869] [<ffffffff811e5abb>] ? __slab_free+0xcb/0x2c0 [ 600.236871] [<ffffffff811e55cb>] ? kmem_cache_alloc_node+0xbb/0x1f0 [ 600.236873] [<ffffffff8139f2c3>] ? create_task_io_context+0x23/0x100 [ 600.236875] [<ffffffff812192a8>] do_vfs_ioctl+0x298/0x480 [ 600.236876] [<ffffffff8139f3e6>] ? get_task_io_context+0x46/0x90 [ 600.236878] [<ffffffff813ad98c>] ? set_task_ioprio+0x8c/0xa0 [ 600.236880] [<ffffffff81219509>] SyS_ioctl+0x79/0x90 [ 600.236882] [<ffffffff817fcff6>] entry_SYSCALL_64_fastpath+0x16/0x75 [ 600.236884] INFO: task btrfs:2970 blocked for more than 120 seconds. [ 600.236885] Not tainted 4.4.0-040400rc6-generic #201512202030 [ 600.236886] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 600.236887] btrfs D ffff88081a8e3af8 0 2970 1974 0x00000000 [ 600.236889] ffff88081a8e3af8 ffffffff810a8420 ffff88085bfca640 ffff880826c4e600 [ 600.236891] ffff88081a8e4000 ffff880857bb0230 ffff88082ad11000 000000000006e615 [ 600.236893] ffff88081ba6df30 ffff88081a8e3b10 ffffffff817f8f55 ffff880857bb01b0 [ 600.236895] Call Trace: [ 600.236896] [<ffffffff810a8420>] ? wake_up_q+0x70/0x70 [ 600.236898] [<ffffffff817f8f55>] schedule+0x35/0x80 [ 600.236908] [<ffffffffc03ab972>] wait_for_commit.isra.16+0x52/0xa0 [btrfs] [ 600.236910] [<ffffffff810bfec0>] ? wake_atomic_t_function+0x60/0x60 [ 600.236921] [<ffffffffc03ac0e5>] btrfs_wait_for_commit+0x145/0x170 [btrfs] [ 600.236930] [<ffffffffc039b257>] btrfs_inc_block_group_ro+0x67/0x1b0 [btrfs] [ 600.236942] [<ffffffffc040a2df>] scrub_enumerate_chunks+0x21f/0x580 [btrfs] [ 600.236944] [<ffffffff810bfe00>] ? prepare_to_wait_event+0x90/0xf0 [ 600.236956] [<ffffffffc040b95c>] btrfs_scrub_dev+0x1bc/0x530 [btrfs] [ 600.236967] [<ffffffffc03e5ff7>] ? btrfs_ioctl+0xdf7/0x2850 [btrfs] [ 600.236969] [<ffffffff812265f6>] ? __mnt_want_write+0x56/0x60 [ 600.236981] [<ffffffffc03e6c97>] btrfs_ioctl+0x1a97/0x2850 [btrfs] [ 600.236983] [<ffffffff811e55cb>] ? kmem_cache_alloc_node+0xbb/0x1f0 [ 600.236985] [<ffffffff8139f2c3>] ? create_task_io_context+0x23/0x100 [ 600.236987] [<ffffffff812192a8>] do_vfs_ioctl+0x298/0x480 [ 600.236989] [<ffffffff8139f3e6>] ? get_task_io_context+0x46/0x90 [ 600.236991] [<ffffffff813ad98c>] ? set_task_ioprio+0x8c/0xa0 [ 600.236993] [<ffffffff81219509>] SyS_ioctl+0x79/0x90 [ 600.236994] [<ffffffff817fcff6>] entry_SYSCALL_64_fastpath+0x16/0x75 [ 600.236996] INFO: task btrfs:2971 blocked for more than 120 seconds. [ 600.236997] Not tainted 4.4.0-040400rc6-generic #201512202030 [ 600.236998] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 600.236999] btrfs D ffff88081a8e7af8 0 2971 1974 0x00000000 [ 600.237001] ffff88081a8e7af8 ffffffff810a8420 ffffffff81e11500 ffff880826c4d940 [ 600.237003] ffff88081a8e8000 ffff880857bb0230 ffff88082ad11000 000000000006e615 [ 600.237005] ffff88007b243f30 ffff88081a8e7b10 ffffffff817f8f55 ffff880857bb01b0 [ 600.237007] Call Trace: [ 600.237009] [<ffffffff810a8420>] ? wake_up_q+0x70/0x70 [ 600.237010] [<ffffffff817f8f55>] schedule+0x35/0x80 [ 600.237021] [<ffffffffc03ab972>] wait_for_commit.isra.16+0x52/0xa0 [btrfs] [ 600.237023] [<ffffffff810bfec0>] ? wake_atomic_t_function+0x60/0x60 [ 600.237034] [<ffffffffc03ac0e5>] btrfs_wait_for_commit+0x145/0x170 [btrfs] [ 600.237043] [<ffffffffc039b257>] btrfs_inc_block_group_ro+0x67/0x1b0 [btrfs] [ 600.237055] [<ffffffffc040a2df>] scrub_enumerate_chunks+0x21f/0x580 [btrfs] [ 600.237057] [<ffffffff810bfe00>] ? prepare_to_wait_event+0x90/0xf0 [ 600.237069] [<ffffffffc040b95c>] btrfs_scrub_dev+0x1bc/0x530 [btrfs] [ 600.237080] [<ffffffffc03e5ff7>] ? btrfs_ioctl+0xdf7/0x2850 [btrfs] [ 600.237082] [<ffffffff812265f6>] ? __mnt_want_write+0x56/0x60 [ 600.237094] [<ffffffffc03e6c97>] btrfs_ioctl+0x1a97/0x2850 [btrfs] [ 600.237096] [<ffffffff811e55cb>] ? kmem_cache_alloc_node+0xbb/0x1f0 [ 600.237098] [<ffffffff8139f2c3>] ? create_task_io_context+0x23/0x100 [ 600.237100] [<ffffffff812192a8>] do_vfs_ioctl+0x298/0x480 [ 600.237102] [<ffffffff8139f3e6>] ? get_task_io_context+0x46/0x90 [ 600.237104] [<ffffffff813ad98c>] ? set_task_ioprio+0x8c/0xa0 [ 600.237105] [<ffffffff81219509>] SyS_ioctl+0x79/0x90 [ 600.237107] [<ffffffff817fcff6>] entry_SYSCALL_64_fastpath+0x16/0x75 [ 600.237109] INFO: task btrfs:2972 blocked for more than 120 seconds. [ 600.237110] Not tainted 4.4.0-040400rc6-generic #201512202030 [ 600.237111] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 600.237112] btrfs D ffff88081a8ebaf8 0 2972 1974 0x00000000 [ 600.237114] ffff88081a8ebaf8 ffffffff810a8420 ffffffff81e11500 ffff880826c4f2c0 [ 600.237116] ffff88081a8ec000 ffff880857bb0230 ffff88082ad11000 000000000006e615 [ 600.237118] ffff88081b95fea0 ffff88081a8ebb10 ffffffff817f8f55 ffff880857bb01b0 [ 600.237120] Call Trace: [ 600.237122] [<ffffffff810a8420>] ? wake_up_q+0x70/0x70 [ 600.237123] [<ffffffff817f8f55>] schedule+0x35/0x80 [ 600.237134] [<ffffffffc03ab972>] wait_for_commit.isra.16+0x52/0xa0 [btrfs] [ 600.237136] [<ffffffff810bfec0>] ? wake_atomic_t_function+0x60/0x60 [ 600.237146] [<ffffffffc03ac0e5>] btrfs_wait_for_commit+0x145/0x170 [btrfs] [ 600.237156] [<ffffffffc039b257>] btrfs_inc_block_group_ro+0x67/0x1b0 [btrfs] [ 600.237168] [<ffffffffc040a2df>] scrub_enumerate_chunks+0x21f/0x580 [btrfs] [ 600.237170] [<ffffffff810bfe00>] ? prepare_to_wait_event+0x90/0xf0 [ 600.237182] [<ffffffffc040b95c>] btrfs_scrub_dev+0x1bc/0x530 [btrfs] [ 600.237193] [<ffffffffc03e5ff7>] ? btrfs_ioctl+0xdf7/0x2850 [btrfs] [ 600.237195] [<ffffffff812265f6>] ? __mnt_want_write+0x56/0x60 [ 600.237207] [<ffffffffc03e6c97>] btrfs_ioctl+0x1a97/0x2850 [btrfs] [ 600.237209] [<ffffffff811e55cb>] ? kmem_cache_alloc_node+0xbb/0x1f0 [ 600.237211] [<ffffffff8139f2c3>] ? create_task_io_context+0x23/0x100 [ 600.237213] [<ffffffff812192a8>] do_vfs_ioctl+0x298/0x480 [ 600.237215] [<ffffffff8139f3e6>] ? get_task_io_context+0x46/0x90 [ 600.237217] [<ffffffff813ad98c>] ? set_task_ioprio+0x8c/0xa0 [ 600.237218] [<ffffffff81219509>] SyS_ioctl+0x79/0x90 [ 600.237220] [<ffffffff817fcff6>] entry_SYSCALL_64_fastpath+0x16/0x75 [ 600.237222] INFO: task btrfs:2973 blocked for more than 120 seconds. [ 600.237223] Not tainted 4.4.0-040400rc6-generic #201512202030 [ 600.237224] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 600.237225] btrfs D ffff88081a8efaf8 0 2973 1974 0x00000000 [ 600.237227] ffff88081a8efaf8 ffffffff810a8420 ffff88085bfccc80 ffff880826c48cc0 [ 600.237230] ffff88081a8f0000 ffff880857bb0230 ffff88081d7c9e00 000000000006e615 [ 600.237232] ffff88007b243630 ffff88081a8efb10 ffffffff817f8f55 ffff880857bb01b0 [ 600.237233] Call Trace: [ 600.237235] [<ffffffff810a8420>] ? wake_up_q+0x70/0x70 [ 600.237236] [<ffffffff817f8f55>] schedule+0x35/0x80 [ 600.237247] [<ffffffffc03ab972>] wait_for_commit.isra.16+0x52/0xa0 [btrfs] [ 600.237249] [<ffffffff810bfec0>] ? wake_atomic_t_function+0x60/0x60 [ 600.237259] [<ffffffffc03ac0e5>] btrfs_wait_for_commit+0x145/0x170 [btrfs] [ 600.237269] [<ffffffffc039b257>] btrfs_inc_block_group_ro+0x67/0x1b0 [btrfs] [ 600.237281] [<ffffffffc040a2df>] scrub_enumerate_chunks+0x21f/0x580 [btrfs] [ 600.237283] [<ffffffff810bfe00>] ? prepare_to_wait_event+0x90/0xf0 [ 600.237295] [<ffffffffc040b95c>] btrfs_scrub_dev+0x1bc/0x530 [btrfs] [ 600.237306] [<ffffffffc03e5ff7>] ? btrfs_ioctl+0xdf7/0x2850 [btrfs] [ 600.237308] [<ffffffff812265f6>] ? __mnt_want_write+0x56/0x60 [ 600.237320] [<ffffffffc03e6c97>] btrfs_ioctl+0x1a97/0x2850 [btrfs] [ 600.237327] [<ffffffff811e55cb>] ? kmem_cache_alloc_node+0xbb/0x1f0 [ 600.237329] [<ffffffff8139f2c3>] ? create_task_io_context+0x23/0x100 [ 600.237331] [<ffffffff812192a8>] do_vfs_ioctl+0x298/0x480 [ 600.237333] [<ffffffff8139f3e6>] ? get_task_io_context+0x46/0x90 [ 600.237335] [<ffffffff813ad98c>] ? set_task_ioprio+0x8c/0xa0 [ 600.237336] [<ffffffff81219509>] SyS_ioctl+0x79/0x90 [ 600.237338] [<ffffffff817fcff6>] entry_SYSCALL_64_fastpath+0x16/0x75
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1528177 Title: 14.04.3 - btrfs Kernel panic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-wily/+bug/1528177/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
