INFO: task kworker/u4:4:25793 blocked for more than 143 seconds.
      Not tainted 5.3.0-rc2+ #58
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:4    D21704 25793      2 0x80004000
Workqueue: events_unbound fsnotify_connector_destroy_workfn
Call Trace:
 context_switch kernel/sched/core.c:3254 [inline]
 __schedule+0x8b6/0xcd0 kernel/sched/core.c:3880
 schedule+0x131/0x1e0 kernel/sched/core.c:3944
 schedule_timeout+0x9a/0x2b0 kernel/time/timer.c:1783
 do_wait_for_common+0x359/0x5a0 kernel/sched/completion.c:83
 __wait_for_common kernel/sched/completion.c:104 [inline]
 wait_for_common kernel/sched/completion.c:115 [inline]
 wait_for_completion+0x47/0x60 kernel/sched/completion.c:136
 __synchronize_srcu+0x217/0x2c0 kernel/rcu/srcutree.c:921
 synchronize_srcu+0x2cb/0x2f0 kernel/rcu/srcutree.c:999
 fsnotify_connector_destroy_workfn+0x44/0xb0 fs/notify/mark.c:164
 process_one_work+0x83b/0x1150 kernel/workqueue.c:2269
 worker_thread+0xc01/0x1630 kernel/workqueue.c:2415
 kthread+0x332/0x350 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
INFO: task kworker/u4:2:3447 blocked for more than 143 seconds.
      Not tainted 5.3.0-rc2+ #58
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:2    D21704  3447      2 0x80004000
Workqueue: events_unbound fsnotify_mark_destroy_workfn
Call Trace:
 context_switch kernel/sched/core.c:3254 [inline]
 __schedule+0x8b6/0xcd0 kernel/sched/core.c:3880
 schedule+0x131/0x1e0 kernel/sched/core.c:3944
 schedule_timeout+0x9a/0x2b0 kernel/time/timer.c:1783
 do_wait_for_common+0x359/0x5a0 kernel/sched/completion.c:83
 __wait_for_common kernel/sched/completion.c:104 [inline]
 wait_for_common kernel/sched/completion.c:115 [inline]
 wait_for_completion+0x47/0x60 kernel/sched/completion.c:136
 __synchronize_srcu+0x217/0x2c0 kernel/rcu/srcutree.c:921
 synchronize_srcu+0x2cb/0x2f0 kernel/rcu/srcutree.c:999
 fsnotify_mark_destroy_workfn+0x133/0x310 fs/notify/mark.c:827
 process_one_work+0x83b/0x1150 kernel/workqueue.c:2269
 worker_thread+0xc01/0x1630 kernel/workqueue.c:2415
 kthread+0x332/0x350 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc2+ #58
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x2f8 lib/dump_stack.c:113
 nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x174/0x290 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_all_cpu_backtrace+0x17/0x20 include/linux/nmi.h:146
 check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
 watchdog+0xbb9/0xbd0 kernel/hung_task.c:289
 kthread+0x332/0x350 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5908 Comm: kworker/0:2 Not tainted 5.3.0-rc2+ #58
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events rtc_timer_do_work
RIP: 0010:__preempt_count_dec_and_test arch/x86/include/asm/preempt.h:94 [inline]
RIP: 0010:rcu_read_unlock_sched_notrace include/linux/rcupdate.h:730 [inline]
RIP: 0010:trace_rtc_timer_enqueue+0x231/0x290 include/trace/events/rtc.h:182
Code: 25 c8 64 fc eb 24 e8 1e c8 64 fc c6 05 48 8a e7 03 01 48 c7 c7 e3 06 96 88 be bb 00 00 00 48 c7 c2 06 a9 7a 88 e8 1f ac 49 fc <31> f6 65 ff 0d 92 e4 ee 7a 0f 94 c3 40 0f 94 c6 31 ff e8 68 ca 64
RSP: 0018:ffff888052427a50 EFLAGS: 00000293
RAX: ffffffff851318f0 RBX: 0000000000000000 RCX: ffff888063a04600
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff888052427a70 R08: ffffffff851318d7 R09: fffffbfff11fbdfd
R10: fffffbfff11fbdfd R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff11013ec1d65 R14: ffff88809f60eb10 R15: ffff88809f60eb10
FS:  0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000177c7d0 CR3: 0000000008c6d000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000006b DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rtc_timer_do_work+0x54e/0x910 drivers/rtc/interface.c:912
 process_one_work+0x83b/0x1150 kernel/workqueue.c:2269
 worker_thread+0xc01/0x1630 kernel/workqueue.c:2415
 kthread+0x332/0x350 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352