======================================
| # 43.35 [+0.00] [  170.109653] clocksource: Long readout interval, skipping watchdog check: cs_nsec: 1943967904 wd_nsec: 1943967870
| # 43.35 [+0.00] [  193.861630] rcu: INFO: rcu_preempt self-detected stall on CPU
| # 43.35 [+0.00] [  193.861720] rcu: 0-....: (1 GPs behind) idle=c72c/1/0x4000000000000000 softirq=6785/6786 fqs=5248
| # 43.35 [+0.00] [  193.861770] rcu: (t=21000 jiffies g=13829 q=32 ncpus=4)
# 43.35 [+0.00] [  193.861798] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
# 43.35 [+0.00] [  193.861800] RIP: 0010:_raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:160 (discriminator 2) kernel/locking/spinlock.c:202 (discriminator 2))
# 43.36 [+0.00] [  193.861807] Code: 07 00 65 ff 0d 3d 56 e9 00 74 01 c3 0f 1f 44 00 00 c3 0f 1f 40 00 f3 0f 1e fa 0f 1f 44 00 00 c6 07 00 fb 65 ff 0d 1c 56 e9 00 <74> 01 c3 0f 1f 44 00 00 c3 0f 1f 00 f3 0f 1e fa 0f 1f 44 00 00 c6
All code
========
   0:	07                   	(bad)
   1:	00 65 ff             	add    %ah,-0x1(%rbp)
   4:	0d 3d 56 e9 00       	or     $0xe9563d,%eax
   9:	74 01                	je     0xc
   b:	c3                   	ret
   c:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  11:	c3                   	ret
  12:	0f 1f 40 00          	nopl   0x0(%rax)
  16:	f3 0f 1e fa          	endbr64
  1a:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1f:	c6 07 00             	movb   $0x0,(%rdi)
  22:	fb                   	sti
  23:	65 ff 0d 1c 56 e9 00 	decl   %gs:0xe9561c(%rip)        # 0xe95646
  2a:*	74 01                	je     0x2d		<-- trapping instruction
  2c:	c3                   	ret
  2d:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  32:	c3                   	ret
  33:	0f 1f 00             	nopl   (%rax)
  36:	f3 0f 1e fa          	endbr64
  3a:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  3f:	c6                   	.byte 0xc6

Code starting with the faulting instruction
===========================================
   0:	74 01                	je     0x3
   2:	c3                   	ret
   3:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   8:	c3                   	ret
   9:	0f 1f 00             	nopl   (%rax)
   c:	f3 0f 1e fa          	endbr64
  10:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  15:	c6                   	.byte 0xc6
# 43.36 [+0.00] [  193.861808] RSP: 0018:ff1ef45fc0077d90 EFLAGS: 00000206
# 43.36 [+0.00] [  193.861810] RAX: dead000000000122 RBX: ff11e1bbbec261b0 RCX: 0000000000000001
# 43.36 [+0.00] [  193.861810] RDX: ff1ef45fc0077dd8 RSI: 0000000000000080 RDI: ff11e1bbbec18b00
# 43.36 [+0.00] [  193.861811] RBP: ffffffff8f1221e0 R08: ff11e1bbbec18b28 R09: ff11e1bbbec18da8
# 43.36 [+0.00] [  193.861811] R10: ff1ef45fc0077de0 R11: 0000000000000000 R12: 00000000fffe1038
# 43.37 [+0.00] [  193.861812] R13: ff1ef45fc0077dd8 R14: 0000000000000000 R15: ff11e1bbbec18b00
# 43.37 [+0.00] [  193.861815] FS:  0000000000000000(0000) GS:ff11e1bc2e813000(0000) knlGS:0000000000000000
# 43.37 [+0.00] [  193.861816] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
# 43.37 [+0.00] [  193.861816] CR2: 000056375fa64000 CR3: 000000001b441005 CR4: 0000000000771ef0
# 43.37 [+0.00] [  193.861817] PKRU: 55555554
# 43.37 [+0.00] [  193.861817] Call Trace:
# 43.37 [+0.00] [  193.861820]  <TASK>
# 43.37 [+0.00] [  193.861821]  run_timer_softirq (kernel/time/timer.c:1799 kernel/time/timer.c:2373 kernel/time/timer.c:2385 kernel/time/timer.c:2394 kernel/time/timer.c:2402)
# 43.37 [+0.00] [  193.861828]  handle_softirqs (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/irq.h:142 kernel/softirq.c:623)
# 43.37 [+0.00] [  193.861831]  ? sort_range (kernel/smpboot.c:103)
# 43.37 [+0.00] [  193.861833]  run_ksoftirqd (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:479 kernel/softirq.c:1064 kernel/softirq.c:1055)
# 43.38 [+0.00] [  193.861834]  smpboot_thread_fn (kernel/smpboot.c:160)
# 43.38 [+0.00] [  193.861836]  kthread (kernel/kthread.c:463)
# 43.38 [+0.00] [  193.861837]  ? kthreads_online_cpu (kernel/kthread.c:412)
# 43.38 [+0.00] [  193.861839]  ? kthreads_online_cpu (kernel/kthread.c:412)
# 43.38 [+0.00] [  193.861839]  ret_from_fork (arch/x86/kernel/process.c:164)
# 43.38 [+0.00] [  193.861842]  ? kthreads_online_cpu (kernel/kthread.c:412)
# 43.38 [+0.00] [  193.861842]  ret_from_fork_asm (arch/x86/entry/entry_64.S:256)
| [  170.109653] clocksource: Long readout interval, skipping watchdog check: cs_nsec: 1943967904 wd_nsec: 1943967870
| [  193.861630] rcu: INFO: rcu_preempt self-detected stall on CPU
| [  193.861720] rcu: 0-....: (1 GPs behind) idle=c72c/1/0x4000000000000000 softirq=6785/6786 fqs=5248
| [  193.861770] rcu: (t=21000 jiffies g=13829 q=32 ncpus=4)
[  193.861798] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  193.861800] RIP: 0010:_raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:160 (discriminator 2) kernel/locking/spinlock.c:202 (discriminator 2))
[  193.861807] Code: 07 00 65 ff 0d 3d 56 e9 00 74 01 c3 0f 1f 44 00 00 c3 0f 1f 40 00 f3 0f 1e fa 0f 1f 44 00 00 c6 07 00 fb 65 ff 0d 1c 56 e9 00 <74> 01 c3 0f 1f 44 00 00 c3 0f 1f 00 f3 0f 1e fa 0f 1f 44 00 00 c6
All code
========
   0:	07                   	(bad)
   1:	00 65 ff             	add    %ah,-0x1(%rbp)
   4:	0d 3d 56 e9 00       	or     $0xe9563d,%eax
   9:	74 01                	je     0xc
   b:	c3                   	ret
   c:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  11:	c3                   	ret
  12:	0f 1f 40 00          	nopl   0x0(%rax)
  16:	f3 0f 1e fa          	endbr64
  1a:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1f:	c6 07 00             	movb   $0x0,(%rdi)
  22:	fb                   	sti
  23:	65 ff 0d 1c 56 e9 00 	decl   %gs:0xe9561c(%rip)        # 0xe95646
  2a:*	74 01                	je     0x2d		<-- trapping instruction
  2c:	c3                   	ret
  2d:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  32:	c3                   	ret
  33:	0f 1f 00             	nopl   (%rax)
  36:	f3 0f 1e fa          	endbr64
  3a:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  3f:	c6                   	.byte 0xc6

Code starting with the faulting instruction
===========================================
   0:	74 01                	je     0x3
   2:	c3                   	ret
   3:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   8:	c3                   	ret
   9:	0f 1f 00             	nopl   (%rax)
   c:	f3 0f 1e fa          	endbr64
  10:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  15:	c6                   	.byte 0xc6
[  193.861808] RSP: 0018:ff1ef45fc0077d90 EFLAGS: 00000206
[  193.861810] RAX: dead000000000122 RBX: ff11e1bbbec261b0 RCX: 0000000000000001
[  193.861810] RDX: ff1ef45fc0077dd8 RSI: 0000000000000080 RDI: ff11e1bbbec18b00
[  193.861811] RBP: ffffffff8f1221e0 R08: ff11e1bbbec18b28 R09: ff11e1bbbec18da8
[  193.861811] R10: ff1ef45fc0077de0 R11: 0000000000000000 R12: 00000000fffe1038
[  193.861812] R13: ff1ef45fc0077dd8 R14: 0000000000000000 R15: ff11e1bbbec18b00
[  193.861815] FS:  0000000000000000(0000) GS:ff11e1bc2e813000(0000) knlGS:0000000000000000
[  193.861816] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  193.861816] CR2: 000056375fa64000 CR3: 000000001b441005 CR4: 0000000000771ef0
[  193.861817] PKRU: 55555554
[  193.861817] Call Trace:
[  193.861820]  <TASK>
[  193.861821]  run_timer_softirq (kernel/time/timer.c:1799 kernel/time/timer.c:2373 kernel/time/timer.c:2385 kernel/time/timer.c:2394 kernel/time/timer.c:2402)
[  193.861828]  handle_softirqs (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/irq.h:142 kernel/softirq.c:623)
[  193.861831]  ? sort_range (kernel/smpboot.c:103)
[  193.861833]  run_ksoftirqd (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:479 kernel/softirq.c:1064 kernel/softirq.c:1055)
[  193.861834]  smpboot_thread_fn (kernel/smpboot.c:160)
[  193.861836]  kthread (kernel/kthread.c:463)
[  193.861837]  ? kthreads_online_cpu (kernel/kthread.c:412)
[  193.861839]  ? kthreads_online_cpu (kernel/kthread.c:412)
[  193.861839]  ret_from_fork (arch/x86/kernel/process.c:164)
[  193.861842]  ? kthreads_online_cpu (kernel/kthread.c:412)


Finger prints:
_raw_spin_unlock_irq:run_timer_softirq:handle_softirqs:run_ksoftirqd:smpboot_thread_fn