======================================
| xx__-> echo $?
| 0
| xx__-> [  895.208252] clocksource: Long readout interval, skipping watchdog check: cs_nsec: 1045006917 wd_nsec: 1045007039
| [  940.531966] irq 51: nobody cared (try booting with the "irqpoll" option)
[  940.532058] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  940.532059] Call Trace:
[  940.532062]  <IRQ>
[  940.532066]  dump_stack_lvl (lib/dump_stack.c:122)
[  940.532072]  __report_bad_irq (kernel/irq/spurious.c:170)
[  940.532074]  note_interrupt.cold (kernel/irq/spurious.c:372)
[  940.532075]  handle_irq_event (kernel/irq/handle.c:253 kernel/irq/handle.c:265)
[  940.532079]  handle_edge_irq (kernel/irq/chip.c:857)
[  940.532081]  __common_interrupt (./include/asm-generic/irq_regs.h:29 (discriminator 6) arch/x86/kernel/irq.c:329 (discriminator 6))
[  940.532083]  ? __sysvec_apic_timer_interrupt (./arch/x86/include/asm/jump_label.h:37 ./arch/x86/include/asm/trace/irq_vectors.h:40 arch/x86/kernel/apic/apic.c:1063)
[  940.532086]  common_interrupt (arch/x86/kernel/irq.c:319 (discriminator 49))
[  940.532090]  </IRQ>
[  940.532090]  <TASK>
[  940.532090]  asm_common_interrupt (./arch/x86/include/asm/idtentry.h:688)
[  940.532092] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 (discriminator 2) kernel/locking/spinlock.c:194 (discriminator 2))
[  940.532095] Code: 00 66 90 66 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 0f 1f 44 00 00 c6 07 00 f7 c6 00 02 00 00 74 01 fb 65 ff 0d 44 52 e9 00 <74> 01 c3 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 f3 0f
All code
========
   0:	00 66 90             	add    %ah,-0x70(%rsi)
   3:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
   a:	00 00 00 00 
   e:	f3 0f 1e fa          	endbr64
  12:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  17:	c6 07 00             	movb   $0x0,(%rdi)
  1a:	f7 c6 00 02 00 00    	test   $0x200,%esi
  20:	74 01                	je     0x23
  22:	fb                   	sti
  23:	65 ff 0d 44 52 e9 00 	decl   %gs:0xe95244(%rip)        # 0xe9526e
  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:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  3a:	00 00 00 00 
  3e:	f3                   	repz
  3f:	0f                   	.byte 0xf

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:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  10:	00 00 00 00 
  14:	f3                   	repz
  15:	0f                   	.byte 0xf
[  940.532096] RSP: 0018:ff6bb3bc051ebd38 EFLAGS: 00000286
[  940.532098] RAX: 00000000ffffffff RBX: ff2194a381d44000 RCX: 0000000000000017
[  940.532099] RDX: ffffffff9d7c0cb5 RSI: 0000000000000286 RDI: ffffffff9eaba400
[  940.532099] RBP: 0000000000000001 R08: 0000000000000001 R09: ff2194a385033c00
[  940.532100] R10: ff6bb3bc051ebe68 R11: 0000000000000001 R12: ffffffff9eaba400
[  940.532100] R13: ff6bb3bc0035f2a8 R14: ff2194a385033c00 R15: 0000000000000286
[  940.532101]  ? rpm_suspend (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/rpm.h:84 drivers/base/power/runtime.c:744)
[  940.532105]  uart_write (drivers/tty/serial/serial_core.c:74 drivers/tty/serial/serial_core.c:92 drivers/tty/serial/serial_core.c:88 drivers/tty/serial/serial_core.c:634)
[  940.532108]  n_tty_write (drivers/tty/n_tty.c:561 drivers/tty/n_tty.c:2377)
[  940.532110]  ? swake_up_all (kernel/sched/wait.c:458)
[  940.532112]  file_tty_write.isra.0 (drivers/tty/tty_io.c:1006 drivers/tty/tty_io.c:1081)
[  940.532114]  vfs_write (fs/read_write.c:594 (discriminator 1) fs/read_write.c:686 (discriminator 1))
[  940.532117]  ? __hrtimer_run_queues (./include/linux/seqlock.h:574 kernel/time/hrtimer.c:1803 kernel/time/hrtimer.c:1841)
[  940.532120]  ksys_write (fs/read_write.c:739)
[  940.532121]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1))
[  940.532123]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:131)
[  940.532125] RIP: 0033:0x7fd732ba6c5e
[  940.532127] Code: 4d 89 d8 e8 14 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 13 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 14 bd 00 00       	call   0xbd1c
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 13 ff ff ff       	call   0xffffffffffffff4c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 13 ff ff ff       	call   0xffffffffffffff22
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[  940.532127] RSP: 002b:00007ffdd4359090 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[  940.532128] RAX: ffffffffffffffda RBX: 000055ee69c5e130 RCX: 00007fd732ba6c5e
[  940.532129] RDX: 0000000000000001 RSI: 000055ee69c5e130 RDI: 0000000000000001
[  940.532129] RBP: 00007ffdd43590a0 R08: 0000000000000000 R09: 0000000000000000
[  940.532129] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001


Finger prints:
__report_bad_irq:handle_irq_event:handle_edge_irq:__common_interrupt:common_interrupt