[   23.183506] irq 52: nobody cared (try booting with the "irqpoll" option)
[   23.183569] CPU: 0 UID: 0 PID: 179 Comm: perl Not tainted 7.1.0-rc3-virtme #1 PREEMPT(lazy) 
[   23.183571] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   23.183572] Call Trace:
[   23.183575]  <IRQ>
[   23.183576]  dump_stack_lvl+0x4d/0x70
[   23.183582]  __report_bad_irq+0x35/0xb4
[   23.183584]  note_interrupt.cold+0x1a/0x58
[   23.183585]  handle_irq_event+0x6e/0x80
[   23.183588]  handle_edge_irq+0xc7/0x190
[   23.183590]  __common_interrupt+0x40/0xd0
[   23.183593]  common_interrupt+0x7a/0x90
[   23.183597]  </IRQ>
[   23.183597]  <TASK>
[   23.183597]  asm_common_interrupt+0x26/0x40
[   23.183599] RIP: 0010:_raw_spin_unlock_irqrestore+0x1c/0x30
[   23.183602] 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 34 f5 2a 01 <74> 01 c3 e8 cc 1c 33 ff c3 66 66 2e 0f 1f 84 00 00 00 00 00 f3 0f
[   23.183603] RSP: 0018:ff7781a8c03ffd40 EFLAGS: 00000286
[   23.183605] RAX: 00000000ffffffff RBX: ff260fd64207c000 RCX: 0000000000000017
[   23.183606] RDX: ffffffffbe477c34 RSI: 0000000000000286 RDI: ffffffffbfc88000
[   23.183606] RBP: 0000000000000001 R08: 000000054f7eb9d7 R09: 000000000000b396
[   23.183607] R10: ff7781a8c03ffe68 R11: 0000000000000001 R12: ffffffffbfc88000
[   23.183607] R13: ff7781a8c03172a0 R14: ff260fd642083400 R15: 0000000000000286
[   23.183608]  ? rpm_suspend+0x184/0x610
[   23.183611]  uart_write+0xc8/0x2a0
[   23.183614]  n_tty_write+0x15b/0x510
[   23.183617]  ? swake_up_all+0xf0/0xf0
[   23.183619]  file_tty_write.isra.0+0x147/0x2f0
[   23.183621]  vfs_write+0x257/0x5c0
[   23.183624]  ksys_write+0x7b/0x110
[   23.183625]  do_syscall_64+0x104/0xfc0
[   23.183626]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   23.183627] RIP: 0033:0x7f6a2354808e
[   23.183629] Code: 4d 89 d8 e8 94 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 03 ff ff ff 0f 1f 00 f3 0f 1e fa
[   23.183629] RSP: 002b:00007ffdb7f5b550 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   23.183630] RAX: ffffffffffffffda RBX: 000055ba78565110 RCX: 00007f6a2354808e
[   23.183630] RDX: 0000000000000001 RSI: 000055ba78565110 RDI: 0000000000000001
[   23.183631] RBP: 00007ffdb7f5b560 R08: 0000000000000000 R09: 0000000000000000
[   23.183631] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001
[   23.183631] R13: 000055ba7852c010 R14: 0000000000000001 R15: 000055ba78565110
[   23.183632]  </TASK>
[   23.183632] handlers:
[   23.184951] [<00000000b11d6817>] serial8250_interrupt
[   23.184982] Disabling IRQ #52
[ 3204.163005] clocksource: Watchdog remote CPU 3 read timed out