[  247.570661] irq 52: nobody cared (try booting with the "irqpoll" option)
[  247.570713] CPU: 2 UID: 0 PID: 1465 Comm: perl Not tainted 7.3.0-virtme #1 PREEMPT(lazy) 
[  247.570715] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  247.570716] Call Trace:
[  247.570719]  <IRQ>
[  247.570720]  dump_stack_lvl+0x4d/0x70
[  247.570725]  __report_bad_irq+0x35/0xaa
[  247.570728]  note_interrupt.cold+0x1a/0x58
[  247.570729]  ? add_interrupt_randomness+0x53/0xe0
[  247.570732]  handle_irq_event+0x6e/0x70
[  247.570735]  handle_edge_irq+0xbf/0x180
[  247.570737]  __common_interrupt+0x40/0xd0
[  247.570740]  ? __sysvec_apic_timer_interrupt+0x52/0x100
[  247.570743]  common_interrupt+0x7a/0x90
[  247.570746]  </IRQ>
[  247.570746]  <TASK>
[  247.570747]  asm_common_interrupt+0x26/0x40
[  247.570749] RIP: 0010:_raw_spin_unlock_irqrestore+0x1d/0x30
[  247.570751] Code: 00 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 48 ff 0d ab f8 2b 01 <74> 01 c3 e8 1b f1 31 ff c3 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e
[  247.570752] RSP: 0018:ff6688db8101bd40 EFLAGS: 00000286
[  247.570754] RAX: 00000000ffffffff RBX: ff1a7054821b0000 RCX: 0000000000000017
[  247.570755] RDX: ffffffffb0ed5383 RSI: 0000000000000282 RDI: ffffffffb26a28e0
[  247.570755] RBP: 0000000000000001 R08: 0000003979ef4c20 R09: 0000000000078cbe
[  247.570756] R10: ff6688db8101be68 R11: 0000000000000001 R12: ffffffffb26a28e0
[  247.570756] R13: ff6688db8034f2a0 R14: ff1a70548303f800 R15: 0000000000000282
[  247.570757]  ? rpm_suspend+0x153/0x630
[  247.570760]  uart_write+0xc8/0x2a0
[  247.570763]  n_tty_write+0x163/0x4b0
[  247.570766]  ? swake_up_all+0xf0/0xf0
[  247.570768]  file_tty_write.isra.0+0x152/0x300
[  247.570769]  vfs_write+0x257/0x590
[  247.570773]  ksys_write+0x7b/0x110
[  247.570774]  do_syscall_64+0xcf/0x4a0
[  247.570775]  ? irq_exit_rcu+0x85/0xb0
[  247.570776]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  247.570778] RIP: 0033:0x7fa4271cb56e
[  247.570779] Code: 4d 89 d8 e8 d4 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
[  247.570780] RSP: 002b:00007ffdadcfd380 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[  247.570781] RAX: ffffffffffffffda RBX: 000055d83f5537b0 RCX: 00007fa4271cb56e
[  247.570781] RDX: 0000000000000001 RSI: 000055d83f5537b0 RDI: 0000000000000001
[  247.570781] RBP: 00007ffdadcfd390 R08: 0000000000000000 R09: 0000000000000000
[  247.570782] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001
[  247.570782] R13: 000055d83f51a010 R14: 0000000000000001 R15: 000055d83f5537b0
[  247.570783]  </TASK>
[  247.570783] handlers:
[  247.571419] [<00000000e0ee3d2e>] serial8250_interrupt
[  247.571441] Disabling IRQ #52