This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1813881
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: bionic
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https://bugs.launchpad.net/bugs/1813881
Title:
Kworker process stuck in uninterruptible sleep
Status in linux package in Ubuntu:
Incomplete
Bug description:
2019-01-22T09:03:34.968028+00:00 localhost kernel: [80233.315906] INFO: task
kworker/u30:3:5705 blocked for more than 120 seconds.
2019-01-22T09:03:34.968049+00:00 localhost kernel: [80233.321444]
Tainted: P O 4.15.0-43-generic #46~16.04.1-Ubuntu
2019-01-22T09:03:34.980485+00:00 localhost kernel: [80233.327648] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
2019-01-22T09:03:34.980519+00:00 localhost kernel: [80233.333902]
kworker/u30:3 D 0 5705 2 0x80000000
2019-01-22T09:03:34.980521+00:00 localhost kernel: [80233.333909] Workqueue:
events_unbound fsnotify_mark_destroy_workfn
2019-01-22T09:03:34.980522+00:00 localhost kernel: [80233.333910] Call Trace:
2019-01-22T09:03:34.980526+00:00 localhost kernel: [80233.333914]
__schedule+0x3d6/0x8b0
2019-01-22T09:03:34.980527+00:00 localhost kernel: [80233.333918]
schedule+0x36/0x80
2019-01-22T09:03:34.980528+00:00 localhost kernel: [80233.333920]
schedule_timeout+0x1db/0x370
2019-01-22T09:03:34.980530+00:00 localhost kernel: [80233.333927] ?
__enqueue_entity+0x5c/0x60
2019-01-22T09:03:34.980531+00:00 localhost kernel: [80233.333932] ?
enqueue_entity+0x112/0x670
2019-01-22T09:03:34.980547+00:00 localhost kernel: [80233.333937]
wait_for_completion+0xb4/0x140
2019-01-22T09:03:34.980554+00:00 localhost kernel: [80233.333939] ?
wake_up_q+0x70/0x70
2019-01-22T09:03:34.980556+00:00 localhost kernel: [80233.333944]
__synchronize_srcu.part.13+0x85/0xb0
2019-01-22T09:03:34.980557+00:00 localhost kernel: [80233.333947] ?
trace_raw_output_rcu_utilization+0x50/0x50
2019-01-22T09:03:34.980558+00:00 localhost kernel: [80233.333950]
synchronize_srcu+0xd3/0xe0
2019-01-22T09:03:34.980559+00:00 localhost kernel: [80233.333956] ?
synchronize_srcu+0xd3/0xe0
2019-01-22T09:03:34.980560+00:00 localhost kernel: [80233.333962]
fsnotify_mark_destroy_workfn+0x7c/0xe0
2019-01-22T09:03:34.980568+00:00 localhost kernel: [80233.333966]
process_one_work+0x14d/0x410
2019-01-22T09:03:34.980570+00:00 localhost kernel: [80233.333968]
worker_thread+0x22b/0x460
2019-01-22T09:03:34.980571+00:00 localhost kernel: [80233.333971]
kthread+0x105/0x140
2019-01-22T09:03:34.980572+00:00 localhost kernel: [80233.333974] ?
process_one_work+0x410/0x410
2019-01-22T09:03:34.980573+00:00 localhost kernel: [80233.333976] ?
kthread_destroy_worker+0x50/0x50
2019-01-22T09:03:34.980574+00:00 localhost kernel: [80233.333979]
ret_from_fork+0x35/0x40
The taint on the kernel is from zfs module.
Also there are other processes that reach the same state (D) like dockerd,
systemd(init) ...
2019-01-22T09:03:34.949861+00:00 localhost kernel: [80233.299475] INFO: task
dockerd:2809 blocked for more than 120 seconds.
2019-01-22T09:03:34.949863+00:00 localhost kernel: [80233.303136]
Tainted: P O 4.15.0-43-generic #46~16.04.1-Ubuntu
2019-01-22T09:03:34.962084+00:00 localhost kernel: [80233.309016] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
2019-01-22T09:03:34.962114+00:00 localhost kernel: [80233.315513] dockerd
D 0 2809 1 0x00000000
2019-01-22T09:03:34.962118+00:00 localhost kernel: [80233.315516] Call Trace:
2019-01-22T09:03:34.962120+00:00 localhost kernel: [80233.315521]
__schedule+0x3d6/0x8b0
2019-01-22T09:03:34.962122+00:00 localhost kernel: [80233.315528] ?
xen_smp_send_reschedule+0x10/0x20
2019-01-22T09:03:34.962137+00:00 localhost kernel: [80233.315532]
schedule+0x36/0x80
2019-01-22T09:03:34.962139+00:00 localhost kernel: [80233.315535]
schedule_timeout+0x1db/0x370
2019-01-22T09:03:34.962140+00:00 localhost kernel: [80233.315537] ?
try_to_wake_up+0x59/0x4a0
2019-01-22T09:03:34.962164+00:00 localhost kernel: [80233.315539]
wait_for_completion+0xb4/0x140
2019-01-22T09:03:34.962168+00:00 localhost kernel: [80233.315541] ?
wake_up_q+0x70/0x70
2019-01-22T09:03:34.962170+00:00 localhost kernel: [80233.315547]
flush_work+0x129/0x1e0
2019-01-22T09:03:34.962171+00:00 localhost kernel: [80233.315552] ?
worker_detach_from_pool+0xb0/0xb0
2019-01-22T09:03:34.962186+00:00 localhost kernel: [80233.315555]
flush_delayed_work+0x3f/0x50
2019-01-22T09:03:34.962194+00:00 localhost kernel: [80233.315559]
fsnotify_wait_marks_destroyed+0x15/0x20
2019-01-22T09:03:34.962195+00:00 localhost kernel: [80233.315561]
fsnotify_destroy_group+0x48/0xd0
2019-01-22T09:03:34.962196+00:00 localhost kernel: [80233.315563]
inotify_release+0x1e/0x50
2019-01-22T09:03:34.962197+00:00 localhost kernel: [80233.315565]
__fput+0xea/0x220
2019-01-22T09:03:34.962198+00:00 localhost kernel: [80233.315567]
____fput+0xe/0x10
2019-01-22T09:03:34.962200+00:00 localhost kernel: [80233.315569]
task_work_run+0x8a/0xb0
2019-01-22T09:03:34.962202+00:00 localhost kernel: [80233.315571]
exit_to_usermode_loop+0xc4/0xd0
2019-01-22T09:03:34.962203+00:00 localhost kernel: [80233.315573]
do_syscall_64+0xf4/0x130
2019-01-22T09:03:34.962205+00:00 localhost kernel: [80233.315575]
entry_SYSCALL_64_after_hwframe+0x3d/0xa2
The issues seems to be related to this fix:
(https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/1802021).
The issue is reproducing also on Ubuntu 16.04.5LTS with kernel version
4.15.0-43-generic.
I am opening this bug for better traceability of the bak-ported fix.
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