======================================
| # 45.39 [+0.00] [   30.845269] clocksource: Long readout interval, skipping watchdog check: cs_nsec: 9559925010 wd_nsec: 9559925327
| # 45.39 [+0.00] [   36.938236] rcu: INFO: rcu_preempt self-detected stall on CPU
| # 45.39 [+0.00] [   36.938241] rcu: 0-....: (14017 ticks this GP) idle=4bdc/1/0x4000000000000000 softirq=4460/4460 fqs=5154
| # 45.39 [+0.00] [   36.938245] rcu: (t=21000 jiffies g=7977 q=65 ncpus=4)
# 45.40 [+0.00] [   36.938251] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
# 45.40 [+0.00] [   36.938253] Workqueue:  0x0 (events)
# 45.40 [+0.00] [   36.938259] RIP: 0010:console_flush_one_record (kernel/printk/printk.c:3223)
# 45.40 [+0.00] [   36.938264] Code: 55 98 00 0f b6 44 24 0f 84 c0 0f 85 df 00 00 00 31 c0 88 03 e8 3e 1b 00 00 41 f7 c4 00 02 00 00 0f 84 be 00 00 00 fb 80 3b 00 <0f> 85 a6 00 00 00 49 8b 47 58 48 39 45 00 73 04 48 89 45 00 48 8b
All code
========
   0:	55                   	push   %rbp
   1:	98                   	cwtl
   2:	00 0f                	add    %cl,(%rdi)
   4:	b6 44                	mov    $0x44,%dh
   6:	24 0f                	and    $0xf,%al
   8:	84 c0                	test   %al,%al
   a:	0f 85 df 00 00 00    	jne    0xef
  10:	31 c0                	xor    %eax,%eax
  12:	88 03                	mov    %al,(%rbx)
  14:	e8 3e 1b 00 00       	call   0x1b57
  19:	41 f7 c4 00 02 00 00 	test   $0x200,%r12d
  20:	0f 84 be 00 00 00    	je     0xe4
  26:	fb                   	sti
  27:	80 3b 00             	cmpb   $0x0,(%rbx)
  2a:*	0f 85 a6 00 00 00    	jne    0xd6		<-- trapping instruction
  30:	49 8b 47 58          	mov    0x58(%r15),%rax
  34:	48 39 45 00          	cmp    %rax,0x0(%rbp)
  38:	73 04                	jae    0x3e
  3a:	48 89 45 00          	mov    %rax,0x0(%rbp)
  3e:	48                   	rex.W
  3f:	8b                   	.byte 0x8b

Code starting with the faulting instruction
===========================================
   0:	0f 85 a6 00 00 00    	jne    0xac
   6:	49 8b 47 58          	mov    0x58(%r15),%rax
   a:	48 39 45 00          	cmp    %rax,0x0(%rbp)
   e:	73 04                	jae    0x14
  10:	48 89 45 00          	mov    %rax,0x0(%rbp)
  14:	48                   	rex.W
  15:	8b                   	.byte 0x8b
# 45.40 [+0.00] [   36.938265] RSP: 0018:ff4d0ee600003cf0 EFLAGS: 00000246
# 45.41 [+0.00] [   36.938266] RAX: 0000000000000000 RBX: ff4d0ee600003d72 RCX: 0000000000009d40
# 45.41 [+0.00] [   36.938267] RDX: 0000000000000001 RSI: ffffffffa0c192e0 RDI: ffffffffa0c3fa08
# 45.41 [+0.00] [   36.938267] RBP: ff4d0ee600003d78 R08: 00000000010429d0 R09: ffffffff9f9242cf
# 45.41 [+0.00] [   36.938268] R10: ff190403810429d0 R11: ffe5ab37c0041080 R12: 0000000000000246
# 45.41 [+0.00] [   36.938268] R13: 0000000000000001 R14: 0000000000000000 R15: ffffffffa05dc7e0
# 45.41 [+0.00] [   36.938272] FS:  0000000000000000(0000) GS:ff1904041e013000(0000) knlGS:0000000000000000
# 45.41 [+0.00] [   36.938273] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
# 45.42 [+0.00] [   36.938274] CR2: 000055e872b17000 CR3: 0000000008041005 CR4: 0000000000771ef0
# 45.42 [+0.00] [   36.938274] PKRU: 55555554
# 45.42 [+0.00] [   36.938275] Call Trace:
# 45.42 [+0.00] [   36.938277]  <IRQ>
# 45.42 [+0.00] [   36.938279]  console_unlock (kernel/printk/printk.c:3291 (discriminator 1) kernel/printk/printk.c:3319 (discriminator 1) kernel/printk/printk.c:3359 (discriminator 1))
# 45.42 [+0.00] [   36.938281]  ? down_trylock (kernel/locking/semaphore.c:182)
# 45.42 [+0.00] [   36.938285]  vprintk_emit (./arch/x86/include/asm/preempt.h:95 (discriminator 1) kernel/printk/printk.c:2427 (discriminator 1))
# 45.42 [+0.00] [   36.938285]  ? common_interrupt (arch/x86/kernel/irq.c:319 (discriminator 61))
# 45.42 [+0.00] [   36.938287]  _printk (kernel/printk/printk.c:2455)
# 45.42 [+0.00] [   36.938290]  clocksource_watchdog.cold (kernel/time/clocksource.c:508)
# 45.42 [+0.00] [   36.938292]  ? __clocksource_unstable (kernel/time/clocksource.c:425)
# 45.43 [+0.00] [   36.938294]  call_timer_fn (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/timer.h:127 kernel/time/timer.c:1749)
# 45.43 [+0.00] [   36.938296]  ? __clocksource_unstable (kernel/time/clocksource.c:425)
# 45.43 [+0.00] [   36.938297]  run_timer_softirq (kernel/time/timer.c:1800 kernel/time/timer.c:2373 kernel/time/timer.c:2385 kernel/time/timer.c:2394 kernel/time/timer.c:2402)
# 45.43 [+0.00] [   36.938299]  handle_softirqs (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/irq.h:142 kernel/softirq.c:623)
# 45.43 [+0.00] [   36.938302]  ? handle_edge_irq (kernel/irq/chip.c:857)
# 45.43 [+0.00] [   36.938304]  irq_exit_rcu (kernel/softirq.c:657 kernel/softirq.c:496 kernel/softirq.c:723 kernel/softirq.c:739)
# 45.43 [+0.00] [   36.938305]  common_interrupt (arch/x86/kernel/irq.c:319 (discriminator 49))
# 45.43 [+0.00] [   36.938307]  </IRQ>
# 45.43 [+0.00] [   36.938307]  <TASK>
# 45.43 [+0.00] [   36.938307]  asm_common_interrupt (./arch/x86/include/asm/idtentry.h:688)
# 45.43 [+0.00] [   36.938309] RIP: 0010:finish_task_switch.isra.0 (kernel/sched/core.c:5137)
# 45.44 [+0.00] [   36.938312] Code: 00 0f 1f 44 00 00 41 c7 44 24 34 00 00 00 00 4c 8b bb 58 0a 00 00 4d 85 ff 0f 85 7f 01 00 00 48 89 df e8 e5 cc 9b 00 fb 66 90 <4d> 85 ed 74 18 4d 3b ae 18 05 00 00 0f 84 c1 00 00 00 f0 41 ff 4d
All code
========
   0:	00 0f                	add    %cl,(%rdi)
   2:	1f                   	(bad)
   3:	44 00 00             	add    %r8b,(%rax)
   6:	41 c7 44 24 34 00 00 	movl   $0x0,0x34(%r12)
   d:	00 00 
   f:	4c 8b bb 58 0a 00 00 	mov    0xa58(%rbx),%r15
  16:	4d 85 ff             	test   %r15,%r15
  19:	0f 85 7f 01 00 00    	jne    0x19e
  1f:	48 89 df             	mov    %rbx,%rdi
  22:	e8 e5 cc 9b 00       	call   0x9bcd0c
  27:	fb                   	sti
  28:	66 90                	xchg   %ax,%ax
  2a:*	4d 85 ed             	test   %r13,%r13		<-- trapping instruction
  2d:	74 18                	je     0x47
  2f:	4d 3b ae 18 05 00 00 	cmp    0x518(%r14),%r13
  36:	0f 84 c1 00 00 00    	je     0xfd
  3c:	f0                   	lock
  3d:	41                   	rex.B
  3e:	ff                   	.byte 0xff
  3f:	4d                   	rex.WRB

Code starting with the faulting instruction
===========================================
   0:	4d 85 ed             	test   %r13,%r13
   3:	74 18                	je     0x1d
   5:	4d 3b ae 18 05 00 00 	cmp    0x518(%r14),%r13
   c:	0f 84 c1 00 00 00    	je     0xd3
  12:	f0                   	lock
  13:	41                   	rex.B
  14:	ff                   	.byte 0xff
  15:	4d                   	rex.WRB
# 45.44 [+0.00] [   36.938312] RSP: 0018:ff4d0ee60004fde0 EFLAGS: 00000282
# 45.44 [+0.00] [   36.938313] RAX: 0000000000000000 RBX: ff190403bec28c00 RCX: 0000000000000002
# 45.44 [+0.00] [   36.938313] RDX: 0000000000000000 RSI: 0000000055555554 RDI: ff190403bec28c00
# 45.44 [+0.00] [   36.938313] RBP: ff4d0ee60004fe10 R08: 0000000000000001 R09: 0000000000000000
# 45.44 [+0.00] [   36.938314] R10: 000000000000b6a8 R11: 000000000000b6a8 R12: ff190403812cc440
# 45.45 [+0.00] [   36.938314] R13: 0000000000000000 R14: ff19040381244440 R15: 0000000000000000
# 45.45 [+0.00] [   36.938316]  __schedule (kernel/sched/core.c:5259)
# 45.45 [+0.00] [   36.938317]  schedule (./arch/x86/include/asm/preempt.h:85 (discriminator 14) kernel/sched/core.c:6946 (discriminator 14) kernel/sched/core.c:6960 (discriminator 14))
# 45.45 [+0.00] [   36.938318]  worker_thread (kernel/workqueue.c:3374)
# 45.45 [+0.00] [   36.938321]  ? rescuer_thread (kernel/workqueue.c:3367)
# 45.45 [+0.00] [   36.938322]  kthread (kernel/kthread.c:463)
# 45.45 [+0.00] [   36.938323]  ? kthreads_online_cpu (kernel/kthread.c:412)
# 45.45 [+0.00] [   36.938324]  ? kthreads_online_cpu (kernel/kthread.c:412)
# 45.45 [+0.00] [   36.938325]  ret_from_fork (arch/x86/kernel/process.c:164)
# 45.45 [+0.00] [   36.938327]  ? kthreads_online_cpu (kernel/kthread.c:412)
# 45.46 [+0.00] [   36.938328]  ret_from_fork_asm (arch/x86/entry/entry_64.S:256)
| [   30.845269] clocksource: Long readout interval, skipping watchdog check: cs_nsec: 9559925010 wd_nsec: 9559925327
| [   36.938236] rcu: INFO: rcu_preempt self-detected stall on CPU
| [   36.938241] rcu: 0-....: (14017 ticks this GP) idle=4bdc/1/0x4000000000000000 softirq=4460/4460 fqs=5154
| [   36.938245] rcu: (t=21000 jiffies g=7977 q=65 ncpus=4)
[   36.938251] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   36.938253] Workqueue:  0x0 (events)
[   36.938259] RIP: 0010:console_flush_one_record (kernel/printk/printk.c:3223)
[   36.938264] Code: 55 98 00 0f b6 44 24 0f 84 c0 0f 85 df 00 00 00 31 c0 88 03 e8 3e 1b 00 00 41 f7 c4 00 02 00 00 0f 84 be 00 00 00 fb 80 3b 00 <0f> 85 a6 00 00 00 49 8b 47 58 48 39 45 00 73 04 48 89 45 00 48 8b
All code
========
   0:	55                   	push   %rbp
   1:	98                   	cwtl
   2:	00 0f                	add    %cl,(%rdi)
   4:	b6 44                	mov    $0x44,%dh
   6:	24 0f                	and    $0xf,%al
   8:	84 c0                	test   %al,%al
   a:	0f 85 df 00 00 00    	jne    0xef
  10:	31 c0                	xor    %eax,%eax
  12:	88 03                	mov    %al,(%rbx)
  14:	e8 3e 1b 00 00       	call   0x1b57
  19:	41 f7 c4 00 02 00 00 	test   $0x200,%r12d
  20:	0f 84 be 00 00 00    	je     0xe4
  26:	fb                   	sti
  27:	80 3b 00             	cmpb   $0x0,(%rbx)
  2a:*	0f 85 a6 00 00 00    	jne    0xd6		<-- trapping instruction
  30:	49 8b 47 58          	mov    0x58(%r15),%rax
  34:	48 39 45 00          	cmp    %rax,0x0(%rbp)
  38:	73 04                	jae    0x3e
  3a:	48 89 45 00          	mov    %rax,0x0(%rbp)
  3e:	48                   	rex.W
  3f:	8b                   	.byte 0x8b

Code starting with the faulting instruction
===========================================
   0:	0f 85 a6 00 00 00    	jne    0xac
   6:	49 8b 47 58          	mov    0x58(%r15),%rax
   a:	48 39 45 00          	cmp    %rax,0x0(%rbp)
   e:	73 04                	jae    0x14
  10:	48 89 45 00          	mov    %rax,0x0(%rbp)
  14:	48                   	rex.W
  15:	8b                   	.byte 0x8b
[   36.938265] RSP: 0018:ff4d0ee600003cf0 EFLAGS: 00000246
[   36.938266] RAX: 0000000000000000 RBX: ff4d0ee600003d72 RCX: 0000000000009d40
[   36.938267] RDX: 0000000000000001 RSI: ffffffffa0c192e0 RDI: ffffffffa0c3fa08
[   36.938267] RBP: ff4d0ee600003d78 R08: 00000000010429d0 R09: ffffffff9f9242cf
[   36.938268] R10: ff190403810429d0 R11: ffe5ab37c0041080 R12: 0000000000000246
[   36.938268] R13: 0000000000000001 R14: 0000000000000000 R15: ffffffffa05dc7e0
[   36.938272] FS:  0000000000000000(0000) GS:ff1904041e013000(0000) knlGS:0000000000000000
[   36.938273] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   36.938274] CR2: 000055e872b17000 CR3: 0000000008041005 CR4: 0000000000771ef0
[   36.938274] PKRU: 55555554
[   36.938275] Call Trace:
[   36.938277]  <IRQ>
[   36.938279]  console_unlock (kernel/printk/printk.c:3291 (discriminator 1) kernel/printk/printk.c:3319 (discriminator 1) kernel/printk/printk.c:3359 (discriminator 1))
[   36.938281]  ? down_trylock (kernel/locking/semaphore.c:182)
[   36.938285]  vprintk_emit (./arch/x86/include/asm/preempt.h:95 (discriminator 1) kernel/printk/printk.c:2427 (discriminator 1))
[   36.938285]  ? common_interrupt (arch/x86/kernel/irq.c:319 (discriminator 61))
[   36.938287]  _printk (kernel/printk/printk.c:2455)
[   36.938290]  clocksource_watchdog.cold (kernel/time/clocksource.c:508)
[   36.938292]  ? __clocksource_unstable (kernel/time/clocksource.c:425)
[   36.938294]  call_timer_fn (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/timer.h:127 kernel/time/timer.c:1749)
[   36.938296]  ? __clocksource_unstable (kernel/time/clocksource.c:425)
[   36.938297]  run_timer_softirq (kernel/time/timer.c:1800 kernel/time/timer.c:2373 kernel/time/timer.c:2385 kernel/time/timer.c:2394 kernel/time/timer.c:2402)
[   36.938299]  handle_softirqs (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/irq.h:142 kernel/softirq.c:623)
[   36.938302]  ? handle_edge_irq (kernel/irq/chip.c:857)
[   36.938304]  irq_exit_rcu (kernel/softirq.c:657 kernel/softirq.c:496 kernel/softirq.c:723 kernel/softirq.c:739)
[   36.938305]  common_interrupt (arch/x86/kernel/irq.c:319 (discriminator 49))
[   36.938307]  </IRQ>
[   36.938307]  <TASK>
[   36.938307]  asm_common_interrupt (./arch/x86/include/asm/idtentry.h:688)
[   36.938309] RIP: 0010:finish_task_switch.isra.0 (kernel/sched/core.c:5137)
[   36.938312] Code: 00 0f 1f 44 00 00 41 c7 44 24 34 00 00 00 00 4c 8b bb 58 0a 00 00 4d 85 ff 0f 85 7f 01 00 00 48 89 df e8 e5 cc 9b 00 fb 66 90 <4d> 85 ed 74 18 4d 3b ae 18 05 00 00 0f 84 c1 00 00 00 f0 41 ff 4d
All code
========
   0:	00 0f                	add    %cl,(%rdi)
   2:	1f                   	(bad)
   3:	44 00 00             	add    %r8b,(%rax)
   6:	41 c7 44 24 34 00 00 	movl   $0x0,0x34(%r12)
   d:	00 00 
   f:	4c 8b bb 58 0a 00 00 	mov    0xa58(%rbx),%r15
  16:	4d 85 ff             	test   %r15,%r15
  19:	0f 85 7f 01 00 00    	jne    0x19e
  1f:	48 89 df             	mov    %rbx,%rdi
  22:	e8 e5 cc 9b 00       	call   0x9bcd0c
  27:	fb                   	sti
  28:	66 90                	xchg   %ax,%ax
  2a:*	4d 85 ed             	test   %r13,%r13		<-- trapping instruction
  2d:	74 18                	je     0x47
  2f:	4d 3b ae 18 05 00 00 	cmp    0x518(%r14),%r13
  36:	0f 84 c1 00 00 00    	je     0xfd
  3c:	f0                   	lock
  3d:	41                   	rex.B
  3e:	ff                   	.byte 0xff
  3f:	4d                   	rex.WRB

Code starting with the faulting instruction
===========================================
   0:	4d 85 ed             	test   %r13,%r13
   3:	74 18                	je     0x1d
   5:	4d 3b ae 18 05 00 00 	cmp    0x518(%r14),%r13
   c:	0f 84 c1 00 00 00    	je     0xd3
  12:	f0                   	lock
  13:	41                   	rex.B
  14:	ff                   	.byte 0xff
  15:	4d                   	rex.WRB
[   36.938312] RSP: 0018:ff4d0ee60004fde0 EFLAGS: 00000282
[   36.938313] RAX: 0000000000000000 RBX: ff190403bec28c00 RCX: 0000000000000002
[   36.938313] RDX: 0000000000000000 RSI: 0000000055555554 RDI: ff190403bec28c00
[   36.938313] RBP: ff4d0ee60004fe10 R08: 0000000000000001 R09: 0000000000000000
[   36.938314] R10: 000000000000b6a8 R11: 000000000000b6a8 R12: ff190403812cc440
[   36.938314] R13: 0000000000000000 R14: ff19040381244440 R15: 0000000000000000
[   36.938316]  __schedule (kernel/sched/core.c:5259)
[   36.938317]  schedule (./arch/x86/include/asm/preempt.h:85 (discriminator 14) kernel/sched/core.c:6946 (discriminator 14) kernel/sched/core.c:6960 (discriminator 14))
[   36.938318]  worker_thread (kernel/workqueue.c:3374)
[   36.938321]  ? rescuer_thread (kernel/workqueue.c:3367)
[   36.938322]  kthread (kernel/kthread.c:463)
[   36.938323]  ? kthreads_online_cpu (kernel/kthread.c:412)
[   36.938324]  ? kthreads_online_cpu (kernel/kthread.c:412)
[   36.938325]  ret_from_fork (arch/x86/kernel/process.c:164)
[   36.938327]  ? kthreads_online_cpu (kernel/kthread.c:412)


Finger prints:
console_flush_one_record:console_unlock:vprintk_emit:_printk:call_timer_fn