So it's btrfs problem, i catch hung again with 4.8.7, and i can't catch if ES data stored on ext4 Trace from 4.8.7: Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: INFO: task btrfs-transacti:4143 blocked for more than 120 seconds. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Not tainted 4.8.0-1-amd64 #1 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: btrfs-transacti D ffff9dd15e0d8180 0 4143 2 0x00000000 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dd954a97100 ffff9dd15a7b80c0 ffffffff920e5e15 ffff9dd956ffbe08 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dd956ffc000 ffff9dd9553091f0 ffff9dd955309000 ffff9dd9553091f0 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: 0000000000000000 ffff9dd954a97100 ffffffff925eb4d1 ffff9dca41f6e550 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Call Trace: Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff920e5e15>] ? try_to_del_timer_sync+0x55/0x80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925eb4d1>] ? schedule+0x31/0x80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc04f3dad>] ? wait_current_trans.isra.21+0xcd/0x110 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff920bcf40>] ? wake_atomic_t_function+0x60/0x60 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc04f6453>] ? start_transaction+0x273/0x4b0 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc04f02d7>] ? transaction_kthread+0x77/0x200 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc04f0260>] ? btrfs_cleanup_transaction+0x590/0x590 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff9209af8d>] ? kthread+0xcd/0xf0 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925efaaf>] ? ret_from_fork+0x1f/0x40 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff9209aec0>] ? kthread_create_on_node+0x190/0x190 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: INFO: task htop:12776 blocked for more than 120 seconds. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Not tainted 4.8.0-1-amd64 #1 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: htop D ffff9dd95d898180 0 12776 1 0x00000004 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dd84d02d0c0 ffff9dd959c9a0c0 ffff9dd183ed3e00 0000004100000000 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dd84d050000 ffff9dd84d04fdf8 ffff9dca4319cc68 ffff9dca4319cc80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffffffffffffffff ffff9dd84d04fd90 ffffffff925eb4d1 ffff9dd84d02d0c0 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Call Trace: Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925eb4d1>] ? schedule+0x31/0x80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ede48>] ? rwsem_down_read_failed+0xf8/0x150 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92334f04>] ? call_rwsem_down_read_failed+0x14/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ed70c>] ? down_read+0x1c/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff922715de>] ? proc_pid_cmdline_read+0xae/0x540 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92202160>] ? vfs_read+0x90/0x130 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff922035d2>] ? SyS_read+0x52/0xc0 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ef876>] ? system_call_fast_compare_end+0xc/0x96 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: INFO: task iotop:12785 blocked for more than 120 seconds. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Not tainted 4.8.0-1-amd64 #1 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: iotop D ffff9dd15e158180 0 12785 1 0x00000004 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dd855a92100 ffff9dd15a7ba140 ffff9dd9546e1c00 00007ff86ac74000 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dd8549cc000 ffff9dd8549cbdf8 ffff9dca4319cc68 ffff9dca4319cc80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffffffffffffffff ffff9dd8549cbd90 ffffffff925eb4d1 ffff9dd855a92100 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Call Trace: Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925eb4d1>] ? schedule+0x31/0x80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ede48>] ? rwsem_down_read_failed+0xf8/0x150 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92334f04>] ? call_rwsem_down_read_failed+0x14/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ed70c>] ? down_read+0x1c/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff922715de>] ? proc_pid_cmdline_read+0xae/0x540 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92202160>] ? vfs_read+0x90/0x130 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff922035d2>] ? SyS_read+0x52/0xc0 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ef876>] ? system_call_fast_compare_end+0xc/0x96 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: INFO: task java:18198 blocked for more than 120 seconds. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Not tainted 4.8.0-1-amd64 #1 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: java D ffff9dd95d898180 0 18198 1 0x00000100 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dd660e1a140 ffff9dd959c9a0c0 ffff9dd660e1a140 ffffffff92cff1f8 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dca431b4000 ffff9dca431b3e90 ffff9dca4319cc68 ffff9dca4319cc80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffffffffffffffff ffff9dca431b3e20 ffffffff925eb4d1 ffff9dd660e1a140 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Call Trace: Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925eb4d1>] ? schedule+0x31/0x80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ede48>] ? rwsem_down_read_failed+0xf8/0x150 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff921b51bc>] ? handle_mm_fault+0xebc/0x1250 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92334f04>] ? call_rwsem_down_read_failed+0x14/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ed70c>] ? down_read+0x1c/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92065caf>] ? __do_page_fault+0x43f/0x500 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925f0c58>] ? page_fault+0x28/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: INFO: task java:18207 blocked for more than 120 seconds. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Not tainted 4.8.0-1-amd64 #1 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: java D ffff9dd15e018180 0 18207 1 0x00000100 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dd660e21080 ffffffff92a0d500 ffffffff920f9a34 0000000000000000 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dcf70c28000 ffff9dcf70c27df0 ffff9dca4319cc68 ffff9dca4319cc80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffffffffffffffff ffff9dcf70c27d80 ffffffff925eb4d1 ffff9dd660e21080 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Call Trace: Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff920f9a34>] ? get_futex_key+0x304/0x3d0 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925eb4d1>] ? schedule+0x31/0x80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ede48>] ? rwsem_down_read_failed+0xf8/0x150 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92334f04>] ? call_rwsem_down_read_failed+0x14/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ed70c>] ? down_read+0x1c/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff921c844c>] ? SyS_madvise+0x3cc/0x920 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff9200337c>] ? syscall_trace_enter+0xcc/0x300 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92003b8a>] ? do_syscall_64+0x7a/0xd0 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ef925>] ? entry_SYSCALL64_slow_path+0x25/0x25 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: INFO: task java:18295 blocked for more than 120 seconds. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Not tainted 4.8.0-1-amd64 #1 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: java D ffff9dd15e0d8180 0 18295 1 0x00000100 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dcb4db10040 ffff9dd15a7b80c0 00007f1cf5c2a610 0000000000000000 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dccd142c000 ffff9dccd142be90 ffff9dca4319cc68 ffff9dca4319cc80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffffffffffffffff ffff9dccd142be20 ffffffff925eb4d1 ffff9dcb4db10040 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Call Trace: Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925eb4d1>] ? schedule+0x31/0x80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ede48>] ? rwsem_down_read_failed+0xf8/0x150 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92334f04>] ? call_rwsem_down_read_failed+0x14/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ed70c>] ? down_read+0x1c/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92065caf>] ? __do_page_fault+0x43f/0x500 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925f0c58>] ? page_fault+0x28/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: INFO: task java:18959 blocked for more than 120 seconds. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Not tainted 4.8.0-1-amd64 #1 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: java D ffff9dd95da58180 0 18959 1 0x00000100 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dd83b3d7080 ffff9dd959ca1100 00007f1cf53297b0 0000000000000000 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dce69624000 ffff9dce69623e90 ffff9dca4319cc68 ffff9dca4319cc80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffffffffffffffff ffff9dce69623e20 ffffffff925eb4d1 ffff9dd83b3d7080 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Call Trace: Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925eb4d1>] ? schedule+0x31/0x80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ede48>] ? rwsem_down_read_failed+0xf8/0x150 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff921b51bc>] ? handle_mm_fault+0xebc/0x1250 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92334f04>] ? call_rwsem_down_read_failed+0x14/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ed70c>] ? down_read+0x1c/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92065caf>] ? __do_page_fault+0x43f/0x500 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925f0c58>] ? page_fault+0x28/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: INFO: task java:19019 blocked for more than 120 seconds. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Not tainted 4.8.0-1-amd64 #1 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: java D ffff9dd95da58180 0 19019 1 0x00000100 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dca49c62100 ffff9dd959ca1100 0000000000000863 ffff9dd157647ba8 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dd157648000 ffff9dd183d042d8 ffff9dd183d042f0 ffff9dd157647bc0 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dd183d042d0 ffff9dd18302c7e8 ffffffff925eb4d1 ffff9dd183d04270 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Call Trace: Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925eb4d1>] ? schedule+0x31/0x80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc0533984>] ? btrfs_tree_lock+0x74/0x210 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff920bcf40>] ? wake_atomic_t_function+0x60/0x60 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc04cdf57>] ? btrfs_search_slot+0x707/0x9f0 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc04ce1fe>] ? btrfs_search_slot+0x9ae/0x9f0 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc05504a1>] ? btrfs_delete_delayed_items+0xc1/0x310 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc0550a4d>] ? __btrfs_update_delayed_inode+0x1ad/0x210 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ed26e>] ? mutex_lock+0xe/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc0550f95>] ? __btrfs_run_delayed_items+0x4e5/0x5e0 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc04e3bf6>] ? btrfs_start_dirty_block_groups+0x3c6/0x420 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc04f5a07>] ? btrfs_commit_transaction+0x267/0xa40 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc051337e>] ? btrfs_wait_ordered_range+0x7e/0x100 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc050e0a2>] ? btrfs_sync_file+0x302/0x3f0 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92235888>] ? do_fsync+0x38/0x60 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92235afc>] ? SyS_fsync+0xc/0x10 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92003b8a>] ? do_syscall_64+0x7a/0xd0 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ef925>] ? entry_SYSCALL64_slow_path+0x25/0x25 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: INFO: task java:19058 blocked for more than 120 seconds. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Not tainted 4.8.0-1-amd64 #1 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: java D ffff9dd15e098180 0 19058 1 0x00000100 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dd5d92e50c0 ffff9dd15a7b6080 0000000000000000 00000000eb451169 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dcc51224000 ffff9dcc51223e90 ffff9dca4319cc68 ffff9dca4319cc80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffffffffffffffff ffff9dcc51223e20 ffffffff925eb4d1 ffff9dd5d92e50c0 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Call Trace: Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925eb4d1>] ? schedule+0x31/0x80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ede48>] ? rwsem_down_read_failed+0xf8/0x150 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff921b4f59>] ? handle_mm_fault+0xc59/0x1250 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92334f04>] ? call_rwsem_down_read_failed+0x14/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ed70c>] ? down_read+0x1c/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92065caf>] ? __do_page_fault+0x43f/0x500 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925f0c58>] ? page_fault+0x28/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: INFO: task java:23693 blocked for more than 120 seconds. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Not tainted 4.8.0-1-amd64 #1 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: java D ffff9dd15e0d8180 0 23693 1 0x00000100 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dca49e8b040 ffff9dd15a7b80c0 ffffffff00010000 ffff9dcaa19a7ca0 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dcaa19a8000 ffff9dd660e2a4c8 00000000ffffff00 ffff9dca49e8b040 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: ffff9dca49e8b040 ffff9dcaa19a7cb8 ffffffff925eb4d1 ffff9dd660e2a460 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Call Trace: Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925eb4d1>] ? schedule+0x31/0x80 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc05336c5>] ? btrfs_tree_read_lock+0xd5/0x120 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff920bcf40>] ? wake_atomic_t_function+0x60/0x60 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc04c8f8f>] ? btrfs_read_lock_root_node+0x2f/0x40 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc04cdfa6>] ? btrfs_search_slot+0x756/0x9f0 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ed26e>] ? mutex_lock+0xe/0x30 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92216770>] ? fillonedir+0xe0/0xe0 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffffc04fa7a1>] ? btrfs_real_readdir+0xf1/0x590 [btrfs] Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff9221651b>] ? iterate_dir+0x16b/0x190 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92216a09>] ? SyS_getdents+0x99/0x120 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92216770>] ? fillonedir+0xe0/0xe0 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff92003b8a>] ? do_syscall_64+0x7a/0xd0 Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: [<ffffffff925ef925>] ? entry_SYSCALL64_slow_path+0x25/0x25
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