Hi Hans!
On Sat, 24 Nov 2018 01:08:56 +0100 Hans van Kranenburg
<h...@knorrie.org> wrote:
You didn't share any part of your logging. Can you share a part of dmesg
logging that shows Oops in it?
Here it is, attached to this message.
Previously I didn't attached it because to me it looks substantially the
same as the one I attached in the opening message of this bug (#913119).
If a task hangs while doing disk IO, it might cause messages like these
in dmesg:
INFO: task kthxbye:1157 blocked for more than 120 seconds.
Not tainted blah #1 Debian someversion
[...]
<Some stack trace thing>
These are 'just' informational messages. The process will still wait
until it can continue.
A kernel Oops is something really different. It usually means that some
data structures or code to be executed are corrupt and there's a real
problem going on, it's not just stalled and waiting.
Thank you very much for this explanation: I didn't know this difference
and indeed I realized that I didn't know what a oops really is.
Cesare.
[16192.174787] INFO: task mdX_raid1:221 blocked for more than 120 seconds.
[16192.174792] Not tainted 4.18.0-3-amd64 #1 Debian 4.18.20-1
[16192.174793] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[16192.174795] mdX_raid1 D 0 221 2 0x80000000
[16192.174798] Call Trace:
[16192.174808] ? __schedule+0x2b7/0x880
[16192.174811] schedule+0x28/0x80
[16192.174819] md_super_wait+0x6e/0xa0 [md_mod]
[16192.174824] ? finish_wait+0x80/0x80
[16192.174828] md_update_sb.part.65+0x408/0x840 [md_mod]
[16192.174833] md_check_recovery+0x4ab/0x570 [md_mod]
[16192.174837] raid1d+0x5c/0x890 [raid1]
[16192.174840] ? lock_timer_base+0x67/0x80
[16192.174842] ? try_to_del_timer_sync+0x4d/0x80
[16192.174844] ? del_timer_sync+0x35/0x40
[16192.174847] ? schedule_timeout+0x181/0x380
[16192.174851] ? md_rdev_init+0xb0/0xb0 [md_mod]
[16192.174855] ? md_thread+0x122/0x160 [md_mod]
[16192.174857] ? handle_read_error+0x4f0/0x4f0 [raid1]
[16192.174860] md_thread+0x122/0x160 [md_mod]
[16192.174863] ? finish_wait+0x80/0x80
[16192.174865] kthread+0x113/0x130
[16192.174867] ? kthread_create_worker_on_cpu+0x70/0x70
[16192.174869] ret_from_fork+0x35/0x40
[16192.174872] INFO: task jbd2/dm-4-8:294 blocked for more than 120 seconds.
[16192.174874] Not tainted 4.18.0-3-amd64 #1 Debian 4.18.20-1
[16192.174875] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[16192.174876] jbd2/dm-4-8 D 0 294 2 0x80000000
[16192.174878] Call Trace:
[16192.174881] ? __schedule+0x2b7/0x880
[16192.174882] ? __switch_to_asm+0x40/0x70
[16192.174883] ? __switch_to_asm+0x34/0x70
[16192.174886] ? bit_wait+0x50/0x50
[16192.174888] schedule+0x28/0x80
[16192.174890] io_schedule+0x12/0x40
[16192.174892] bit_wait_io+0xd/0x50
[16192.174894] __wait_on_bit+0x44/0x80
[16192.174896] out_of_line_wait_on_bit+0x91/0xb0
[16192.174899] ? init_wait_var_entry+0x40/0x40
[16192.174905] jbd2_journal_commit_transaction+0x1036/0x1810 [jbd2]
[16192.174907] ? __switch_to_asm+0x40/0x70
[16192.174908] ? __switch_to_asm+0x34/0x70
[16192.174909] ? __switch_to_asm+0x40/0x70
[16192.174911] ? __switch_to_asm+0x34/0x70
[16192.174913] ? __switch_to_asm+0x40/0x70
[16192.174917] ? kjournald2+0xbd/0x270 [jbd2]
[16192.174921] kjournald2+0xbd/0x270 [jbd2]
[16192.174923] ? finish_wait+0x80/0x80
[16192.174927] ? commit_timeout+0x10/0x10 [jbd2]
[16192.174928] kthread+0x113/0x130
[16192.174930] ? kthread_create_worker_on_cpu+0x70/0x70
[16192.174931] ret_from_fork+0x35/0x40
[16192.174938] INFO: task mdX_raid1:603 blocked for more than 120 seconds.
[16192.174939] Not tainted 4.18.0-3-amd64 #1 Debian 4.18.20-1
[16192.174941] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[16192.174942] mdX_raid1 D 0 603 2 0x80000000
[16192.174944] Call Trace:
[16192.174946] ? __schedule+0x2b7/0x880
[16192.174948] schedule+0x28/0x80
[16192.174952] md_super_wait+0x6e/0xa0 [md_mod]
[16192.174955] ? finish_wait+0x80/0x80
[16192.174959] md_update_sb.part.65+0x408/0x840 [md_mod]
[16192.174963] md_check_recovery+0x4ab/0x570 [md_mod]
[16192.174966] raid1d+0x5c/0x890 [raid1]
[16192.174967] ? lock_timer_base+0x67/0x80
[16192.174969] ? try_to_del_timer_sync+0x4d/0x80
[16192.174971] ? del_timer_sync+0x35/0x40
[16192.174973] ? schedule_timeout+0x181/0x380
[16192.174977] ? md_rdev_init+0xb0/0xb0 [md_mod]
[16192.174981] ? md_thread+0x122/0x160 [md_mod]
[16192.174983] ? handle_read_error+0x4f0/0x4f0 [raid1]
[16192.174986] md_thread+0x122/0x160 [md_mod]
[16192.174989] ? finish_wait+0x80/0x80
[16192.174990] kthread+0x113/0x130
[16192.174992] ? kthread_create_worker_on_cpu+0x70/0x70
[16192.174994] ret_from_fork+0x35/0x40
[16192.174997] INFO: task jbd2/dm-9-8:667 blocked for more than 120 seconds.
[16192.174998] Not tainted 4.18.0-3-amd64 #1 Debian 4.18.20-1
[16192.175000] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[16192.175001] jbd2/dm-9-8 D 0 667 2 0x80000000
[16192.175003] Call Trace:
[16192.175005] ? __schedule+0x2b7/0x880
[16192.175008] ? __wake_up_common_lock+0x89/0xc0
[16192.175010] schedule+0x28/0x80
[16192.175014] md_write_start+0x1ad/0x210 [md_mod]
[16192.175017] ? finish_wait+0x80/0x80
[16192.175019] raid1_make_request+0x5d/0xaa0 [raid1]
[16192.175022] ? mempool_alloc+0x67/0x1a0
[16192.175025] ? __slab_alloc+0x1c/0x30
[16192.175027] ? finish_wait+0x80/0x80
[16192.175031] md_handle_request+0x119/0x190 [md_mod]
[16192.175033] ? __switch_to_asm+0x40/0x70
[16192.175034] ? __switch_to_asm+0x34/0x70
[16192.175035] ? __switch_to_asm+0x40/0x70
[16192.175039] raid_map+0x25/0x30 [dm_raid]
[16192.175045] __map_bio+0x42/0x190 [dm_mod]
[16192.175050] __split_and_process_non_flush+0x116/0x220 [dm_mod]
[16192.175055] ? __process_bio+0x170/0x170 [dm_mod]
[16192.175058] __split_and_process_bio+0x7d/0x170 [dm_mod]
[16192.175062] __dm_make_request.isra.30+0x3f/0xa0 [dm_mod]
[16192.175066] generic_make_request+0x1a4/0x400
[16192.175069] ? submit_bio+0x6c/0x140
[16192.175070] submit_bio+0x6c/0x140
[16192.175073] ? guard_bio_eod+0x2c/0xf0
[16192.175075] submit_bh_wbc+0x163/0x190
[16192.175079] jbd2_journal_commit_transaction+0x669/0x1810 [jbd2]
[16192.175081] ? __switch_to_asm+0x40/0x70
[16192.175083] ? __switch_to_asm+0x34/0x70
[16192.175084] ? __switch_to_asm+0x40/0x70
[16192.175088] ? kjournald2+0xbd/0x270 [jbd2]
[16192.175091] kjournald2+0xbd/0x270 [jbd2]
[16192.175094] ? finish_wait+0x80/0x80
[16192.175097] ? commit_timeout+0x10/0x10 [jbd2]
[16192.175099] kthread+0x113/0x130
[16192.175100] ? kthread_create_worker_on_cpu+0x70/0x70
[16192.175102] ret_from_fork+0x35/0x40
[16192.175108] INFO: task rs:main Q:Reg:792 blocked for more than 120 seconds.
[16192.175110] Not tainted 4.18.0-3-amd64 #1 Debian 4.18.20-1
[16192.175111] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[16192.175112] rs:main Q:Reg D 0 792 1 0x00000000
[16192.175114] Call Trace:
[16192.175116] ? __schedule+0x2b7/0x880
[16192.175118] ? bit_wait+0x50/0x50
[16192.175120] schedule+0x28/0x80
[16192.175122] io_schedule+0x12/0x40
[16192.175124] bit_wait_io+0xd/0x50
[16192.175126] __wait_on_bit_lock+0x58/0xb0
[16192.175128] ? __switch_to_asm+0x40/0x70
[16192.175130] out_of_line_wait_on_bit_lock+0x91/0xb0
[16192.175133] ? init_wait_var_entry+0x40/0x40
[16192.175137] do_get_write_access+0x27f/0x460 [jbd2]
[16192.175141] jbd2_journal_get_write_access+0x48/0x60 [jbd2]
[16192.175159] __ext4_journal_get_write_access+0x41/0x70 [ext4]
[16192.175171] ext4_reserve_inode_write+0x8d/0xb0 [ext4]
[16192.175182] ? ext4_dirty_inode+0x43/0x60 [ext4]
[16192.175191] ext4_mark_inode_dirty+0x51/0x1d0 [ext4]
[16192.175195] ? jbd2__journal_start+0xd7/0x1e0 [jbd2]
[16192.175204] ext4_dirty_inode+0x43/0x60 [ext4]
[16192.175207] __mark_inode_dirty+0x112/0x3a0
[16192.175210] generic_update_time+0x9f/0xd0
[16192.175212] file_update_time+0xe0/0x130
[16192.175214] __generic_file_write_iter+0x99/0x1c0
[16192.175224] ext4_file_write_iter+0x201/0x3e0 [ext4]
[16192.175227] ? do_futex+0x4b5/0xad0
[16192.175229] new_sync_write+0x104/0x160
[16192.175232] vfs_write+0xad/0x1a0
[16192.175234] ksys_write+0x52/0xc0
[16192.175237] do_syscall_64+0x55/0x110
[16192.175239] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[16192.175241] RIP: 0033:0x7f51e4c692c7
[16192.175242] Code: Bad RIP value.
[16192.175247] RSP: 002b:00007f51de6dd840 EFLAGS: 00000293 ORIG_RAX:
0000000000000001
[16192.175249] RAX: ffffffffffffffda RBX: 0000000000000020 RCX: 00007f51e4c692c7
[16192.175250] RDX: 000000000000008f RSI: 00007f51cc06d720 RDI: 0000000000000020
[16192.175251] RBP: 00007f51cc06d720 R08: 0000000000000000 R09: 38343a35653a3164
[16192.175252] R10: 646976202c36613a R11: 0000000000000293 R12: 000000000000008f
[16192.175253] R13: 00007f51cc06d720 R14: 0000000000000000 R15: 0000562a1b3326a0
[16192.175286] INFO: task localStorage DB:1980 blocked for more than 120
seconds.
[16192.175288] Not tainted 4.18.0-3-amd64 #1 Debian 4.18.20-1
[16192.175289] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[16192.175291] localStorage DB D 0 1980 1530 0x00000000
[16192.175292] Call Trace:
[16192.175295] ? __schedule+0x2b7/0x880
[16192.175297] ? bit_wait+0x50/0x50
[16192.175299] schedule+0x28/0x80
[16192.175301] io_schedule+0x12/0x40
[16192.175303] bit_wait_io+0xd/0x50
[16192.175305] __wait_on_bit+0x44/0x80
[16192.175306] ? __switch_to_asm+0x34/0x70
[16192.175308] out_of_line_wait_on_bit+0x91/0xb0
[16192.175311] ? init_wait_var_entry+0x40/0x40
[16192.175315] do_get_write_access+0x261/0x460 [jbd2]
[16192.175319] jbd2_journal_get_write_access+0x48/0x60 [jbd2]
[16192.175329] __ext4_journal_get_write_access+0x41/0x70 [ext4]
[16192.175338] ext4_reserve_inode_write+0x8d/0xb0 [ext4]
[16192.175347] ? ext4_dirty_inode+0x43/0x60 [ext4]
[16192.175355] ext4_mark_inode_dirty+0x51/0x1d0 [ext4]
[16192.175363] ? jbd2__journal_start+0xd7/0x1e0 [jbd2]
[16192.175371] ext4_dirty_inode+0x43/0x60 [ext4]
[16192.175373] __mark_inode_dirty+0x112/0x3a0
[16192.175376] generic_update_time+0x9f/0xd0
[16192.175378] file_update_time+0xe0/0x130
[16192.175380] __generic_file_write_iter+0x99/0x1c0
[16192.175382] ? posix_lock_inode+0x12a/0x740
[16192.175391] ext4_file_write_iter+0x201/0x3e0 [ext4]
[16192.175393] new_sync_write+0x104/0x160
[16192.175396] vfs_write+0xad/0x1a0
[16192.175397] ksys_pwrite64+0x71/0x90
[16192.175400] do_syscall_64+0x55/0x110
[16192.175401] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[16192.175403] RIP: 0033:0x7f8b565df05f
[16192.175403] Code: Bad RIP value.
[16192.175406] RSP: 002b:00007f8b35a535a0 EFLAGS: 00000293 ORIG_RAX:
0000000000000012
[16192.175408] RAX: ffffffffffffffda RBX: 0000000000000079 RCX: 00007f8b565df05f
[16192.175409] RDX: 0000000000000018 RSI: 00007f8b35a536e0 RDI: 0000000000000079
[16192.175410] RBP: 00007f8b35a536e0 R08: 0000000000000000 R09: 00007f8b35a536b0
[16192.175411] R10: 0000000000028098 R11: 0000000000000293 R12: 0000000000000018
[16192.175412] R13: 0000000000028098 R14: 0000000000000079 R15: 00007f8b2c576918
[16192.175425] INFO: task kworker/1:1:3084 blocked for more than 120 seconds.
[16192.175427] Not tainted 4.18.0-3-amd64 #1 Debian 4.18.20-1
[16192.175429] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[16192.175430] kworker/1:1 D 0 3084 2 0x80000000
[16192.175437] Workqueue: kdmflush dm_wq_work [dm_mod]
[16192.175438] Call Trace:
[16192.175440] ? __schedule+0x2b7/0x880
[16192.175443] ? __wake_up_common_lock+0x89/0xc0
[16192.175445] schedule+0x28/0x80
[16192.175449] md_write_start+0x1ad/0x210 [md_mod]
[16192.175452] ? finish_wait+0x80/0x80
[16192.175455] raid1_make_request+0x5d/0xaa0 [raid1]
[16192.175459] ? recalibrate_cpu_khz+0x10/0x10
[16192.175462] ? ktime_get+0x3e/0xa0
[16192.175464] ? lapic_next_deadline+0x22/0x30
[16192.175467] ? clockevents_program_event+0xcf/0x100
[16192.175470] ? finish_wait+0x80/0x80
[16192.175473] md_handle_request+0x119/0x190 [md_mod]
[16192.175475] ? __switch_to_asm+0x40/0x70
[16192.175476] ? __switch_to_asm+0x34/0x70
[16192.175479] raid_map+0x25/0x30 [dm_raid]
[16192.175483] __map_bio+0x42/0x190 [dm_mod]
[16192.175487] __split_and_process_non_flush+0x116/0x220 [dm_mod]
[16192.175491] __split_and_process_bio+0x7d/0x170 [dm_mod]
[16192.175494] dm_wq_work+0xbe/0xd0 [dm_mod]
[16192.175497] process_one_work+0x195/0x380
[16192.175499] worker_thread+0x30/0x390
[16192.175501] ? process_one_work+0x380/0x380
[16192.175503] kthread+0x113/0x130
[16192.175504] ? kthread_create_worker_on_cpu+0x70/0x70
[16192.175506] ret_from_fork+0x35/0x40
[16192.175509] INFO: task kworker/u4:1:3723 blocked for more than 120 seconds.
[16192.175511] Not tainted 4.18.0-3-amd64 #1 Debian 4.18.20-1
[16192.175512] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[16192.175513] kworker/u4:1 D 0 3723 2 0x80000000
[16192.175517] Workqueue: writeback wb_workfn (flush-253:4)
[16192.175518] Call Trace:
[16192.175521] ? __schedule+0x2b7/0x880
[16192.175522] ? __switch_to_asm+0x34/0x70
[16192.175524] schedule+0x28/0x80
[16192.175528] md_write_start+0x1ad/0x210 [md_mod]
[16192.175530] ? finish_wait+0x80/0x80
[16192.175532] raid1_make_request+0x5d/0xaa0 [raid1]
[16192.175537] ? bitmap_checkpage+0x75/0x100 [md_mod]
[16192.175540] ? __wake_up_common_lock+0x89/0xc0
[16192.175542] ? finish_wait+0x80/0x80
[16192.175546] md_handle_request+0x119/0x190 [md_mod]
[16192.175548] ? raid1_make_request+0x73d/0xaa0 [raid1]
[16192.175550] raid_map+0x25/0x30 [dm_raid]
[16192.175554] __map_bio+0x42/0x190 [dm_mod]
[16192.175558] __split_and_process_non_flush+0x116/0x220 [dm_mod]
[16192.175562] ? __process_bio+0x170/0x170 [dm_mod]
[16192.175565] __split_and_process_bio+0x7d/0x170 [dm_mod]
[16192.175569] __dm_make_request.isra.30+0x3f/0xa0 [dm_mod]
[16192.175571] generic_make_request+0x1a4/0x400
[16192.175574] ? submit_bio+0x6c/0x140
[16192.175575] submit_bio+0x6c/0x140
[16192.175577] ? guard_bio_eod+0x2c/0xf0
[16192.175579] submit_bh_wbc+0x163/0x190
[16192.175581] __block_write_full_page+0x21d/0x440
[16192.175584] ? check_disk_change+0x60/0x60
[16192.175586] __writepage+0x19/0x50
[16192.175589] write_cache_pages+0x1bc/0x430
[16192.175591] ? __wb_calc_thresh+0x130/0x130
[16192.175594] generic_writepages+0x5c/0x90
[16192.175597] ? cpumask_next_and+0x19/0x20
[16192.175599] ? load_balance+0x18f/0x9e0
[16192.175601] ? kernel_poison_pages+0xc0/0xc0
[16192.175603] ? do_writepages+0x4b/0xe0
[16192.175605] ? blkdev_readpages+0x20/0x20
[16192.175607] do_writepages+0x4b/0xe0
[16192.175609] ? __switch_to_asm+0x40/0x70
[16192.175610] ? __switch_to_asm+0x34/0x70
[16192.175611] ? __switch_to_asm+0x40/0x70
[16192.175612] ? __switch_to_asm+0x34/0x70
[16192.175614] ? __switch_to_asm+0x40/0x70
[16192.175615] ? __switch_to_asm+0x34/0x70
[16192.175616] ? __switch_to_asm+0x40/0x70
[16192.175617] ? __switch_to_asm+0x34/0x70
[16192.175618] ? __switch_to_asm+0x40/0x70
[16192.175620] ? __switch_to_asm+0x40/0x70
[16192.175621] ? __writeback_single_inode+0x3d/0x330
[16192.175623] __writeback_single_inode+0x3d/0x330
[16192.175624] ? __switch_to_asm+0x34/0x70
[16192.175626] ? __switch_to_asm+0x40/0x70
[16192.175628] writeback_sb_inodes+0x1b2/0x460
[16192.175630] __writeback_inodes_wb+0x5d/0xb0
[16192.175632] wb_writeback+0x271/0x300
[16192.175635] ? wb_workfn+0x18d/0x410
[16192.175636] wb_workfn+0x18d/0x410
[16192.175639] process_one_work+0x195/0x380
[16192.175641] worker_thread+0x30/0x390
[16192.175643] ? process_one_work+0x380/0x380
[16192.175644] kthread+0x113/0x130
[16192.175646] ? kthread_create_worker_on_cpu+0x70/0x70
[16192.175647] ret_from_fork+0x35/0x40
[16192.175650] INFO: task kworker/u4:2:3768 blocked for more than 120 seconds.
[16192.175651] Not tainted 4.18.0-3-amd64 #1 Debian 4.18.20-1
[16192.175653] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[16192.175654] kworker/u4:2 D 0 3768 2 0x80000000
[16192.175657] Workqueue: writeback wb_workfn (flush-253:9)
[16192.175658] Call Trace:
[16192.175661] ? __schedule+0x2b7/0x880
[16192.175663] schedule+0x28/0x80
[16192.175667] md_write_start+0x1ad/0x210 [md_mod]
[16192.175669] ? finish_wait+0x80/0x80
[16192.175671] raid1_make_request+0x5d/0xaa0 [raid1]
[16192.175675] ? ptep_clear_flush+0x35/0x40
[16192.175677] ? page_vma_mapped_walk+0x313/0x6c0
[16192.175679] ? kmem_cache_alloc+0x161/0x1c0
[16192.175681] ? finish_wait+0x80/0x80
[16192.175685] md_handle_request+0x119/0x190 [md_mod]
[16192.175687] raid_map+0x25/0x30 [dm_raid]
[16192.175691] __map_bio+0x42/0x190 [dm_mod]
[16192.175694] __split_and_process_non_flush+0x116/0x220 [dm_mod]
[16192.175698] ? __process_bio+0x170/0x170 [dm_mod]
[16192.175702] __split_and_process_bio+0x7d/0x170 [dm_mod]
[16192.175706] __dm_make_request.isra.30+0x3f/0xa0 [dm_mod]
[16192.175708] generic_make_request+0x1a4/0x400
[16192.175710] ? submit_bio+0x6c/0x140
[16192.175711] submit_bio+0x6c/0x140
[16192.175713] ? kmem_cache_alloc+0x161/0x1c0
[16192.175725] ext4_io_submit+0x48/0x60 [ext4]
[16192.175735] ext4_writepages+0x3ee/0xea0 [ext4]
[16192.175738] ? cpumask_next_and+0x18/0x20
[16192.175741] ? do_writepages+0x4b/0xe0
[16192.175749] ? ext4_mark_inode_dirty+0x1d0/0x1d0 [ext4]
[16192.175751] do_writepages+0x4b/0xe0
[16192.175753] ? __switch_to_asm+0x40/0x70
[16192.175754] ? __switch_to_asm+0x34/0x70
[16192.175755] ? __switch_to_asm+0x40/0x70
[16192.175756] ? __switch_to_asm+0x34/0x70
[16192.175758] ? __switch_to_asm+0x40/0x70
[16192.175759] ? __switch_to_asm+0x34/0x70
[16192.175760] ? __switch_to_asm+0x40/0x70
[16192.175761] ? __switch_to_xtra+0x2c3/0x350
[16192.175763] ? __switch_to_asm+0x40/0x70
[16192.175764] ? __switch_to_asm+0x40/0x70
[16192.175766] ? __writeback_single_inode+0x3d/0x330
[16192.175767] __writeback_single_inode+0x3d/0x330
[16192.175770] writeback_sb_inodes+0x1b2/0x460
[16192.175772] __writeback_inodes_wb+0x5d/0xb0
[16192.175774] wb_writeback+0x271/0x300
[16192.175777] ? wb_workfn+0x18d/0x410
[16192.175778] wb_workfn+0x18d/0x410
[16192.175781] process_one_work+0x195/0x380
[16192.175783] worker_thread+0x30/0x390
[16192.175785] ? process_one_work+0x380/0x380
[16192.175786] kthread+0x113/0x130
[16192.175787] ? kthread_create_worker_on_cpu+0x70/0x70
[16192.175789] ret_from_fork+0x35/0x40
