[  876.151020] irq 51: nobody cared (try booting with the "irqpoll" option)
[  876.151104] CPU: 0 UID: 0 PID: 13605 Comm: perl Not tainted 6.19.0-rc3-virtme #1 PREEMPT(voluntary) 
[  876.151107] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  876.151108] Call Trace:
[  876.151112]  <IRQ>
[  876.151114]  dump_stack_lvl+0x4d/0x70
[  876.151121]  __report_bad_irq+0x35/0xb8
[  876.151123]  note_interrupt.cold+0x28/0x66
[  876.151125]  handle_irq_event+0x6e/0x80
[  876.151127]  handle_edge_irq+0xbc/0x180
[  876.151130]  __common_interrupt+0x40/0xd0
[  876.151132]  ? __sysvec_apic_timer_interrupt+0x52/0xf0
[  876.151134]  common_interrupt+0x7a/0x90
[  876.151138]  </IRQ>
[  876.151138]  <TASK>
[  876.151139]  asm_common_interrupt+0x26/0x40
[  876.151141] RIP: 0010:_raw_spin_unlock_irqrestore+0x1c/0x30
[  876.151144] 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 e4 d2 e8 00 <74> 01 c3 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 f3 0f
[  876.151145] RSP: 0018:ff5f836c8682fd38 EFLAGS: 00000286
[  876.151146] RAX: 00000000ffffffff RBX: ff1dde6a41f64000 RCX: 0000000000000017
[  876.151147] RDX: ffffffff923cea75 RSI: 0000000000000282 RDI: ffffffff936c1680
[  876.151148] RBP: 0000000000000001 R08: 0000000000000001 R09: ff1dde6a43c14000
[  876.151148] R10: ff5f836c8682fe68 R11: 0000000000000001 R12: ffffffff936c1680
[  876.151148] R13: ff5f836c8035d000 R14: ff1dde6a43c14000 R15: 0000000000000282
[  876.151149]  ? rpm_suspend+0x185/0x5e0
[  876.151153]  uart_write+0xb4/0x270
[  876.151156]  n_tty_write+0x155/0x560
[  876.151158]  ? swake_up_all+0xd0/0xd0
[  876.151160]  file_tty_write.isra.0+0x15b/0x2a0
[  876.151162]  vfs_write+0x258/0x4d0
[  876.151165]  ? __hrtimer_run_queues+0x161/0x2a0
[  876.151167]  ksys_write+0x73/0xe0
[  876.151168]  do_syscall_64+0xa4/0xfc0
[  876.151170]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  876.151171] RIP: 0033:0x7f08acafac5e
[  876.151173] 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
[  876.151174] RSP: 002b:00007fff5a1bafd0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[  876.151175] RAX: ffffffffffffffda RBX: 000055ea2af221a0 RCX: 00007f08acafac5e
[  876.151175] RDX: 0000000000000001 RSI: 000055ea2af221a0 RDI: 0000000000000001
[  876.151175] RBP: 00007fff5a1bafe0 R08: 0000000000000000 R09: 0000000000000000
[  876.151176] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001
[  876.151176] R13: 000055ea2aee3010 R14: 0000000000000001 R15: 000055ea2af221a0
[  876.151177]  </TASK>
[  876.151177] handlers:
[  876.152442] [<0000000071d594b8>] serial8250_interrupt
[  876.152471] Disabling IRQ #51