[  771.665127] irq 51: nobody cared (try booting with the "irqpoll" option)
[  771.665220] CPU: 0 UID: 0 PID: 3727 Comm: perl Not tainted 6.19.0-rc4-virtme #1 PREEMPT(voluntary) 
[  771.665223] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  771.665224] Call Trace:
[  771.665228]  <IRQ>
[  771.665231]  dump_stack_lvl+0x4d/0x70
[  771.665237]  __report_bad_irq+0x35/0xb8
[  771.665239]  note_interrupt.cold+0x28/0x66
[  771.665241]  handle_irq_event+0x6e/0x80
[  771.665244]  handle_edge_irq+0xbc/0x180
[  771.665246]  __common_interrupt+0x40/0xd0
[  771.665248]  ? __sysvec_apic_timer_interrupt+0x52/0xf0
[  771.665250]  common_interrupt+0x7a/0x90
[  771.665254]  </IRQ>
[  771.665255]  <TASK>
[  771.665255]  asm_common_interrupt+0x26/0x40
[  771.665257] RIP: 0010:_raw_spin_unlock_irqrestore+0x1c/0x30
[  771.665260] 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 b2 e8 00 <74> 01 c3 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 f3 0f
[  771.665261] RSP: 0018:ff46bf1d81333d38 EFLAGS: 00000286
[  771.665263] RAX: 00000000ffffffff RBX: ff246c0501f64000 RCX: 0000000000000017
[  771.665264] RDX: ffffffff93dce9f5 RSI: 0000000000000282 RDI: ffffffff950c1680
[  771.665265] RBP: 0000000000000001 R08: 0000000000000001 R09: ff246c0503c38400
[  771.665265] R10: ff46bf1d81333e68 R11: 0000000000000001 R12: ffffffff950c1680
[  771.665265] R13: ff46bf1d8035d000 R14: ff246c0503c38400 R15: 0000000000000282
[  771.665266]  ? rpm_suspend+0x185/0x5e0
[  771.665270]  uart_write+0xb4/0x270
[  771.665273]  n_tty_write+0x155/0x560
[  771.665275]  ? swake_up_all+0xd0/0xd0
[  771.665278]  file_tty_write.isra.0+0x15b/0x2a0
[  771.665279]  vfs_write+0x258/0x4d0
[  771.665282]  ? __hrtimer_run_queues+0x161/0x2a0
[  771.665284]  ksys_write+0x73/0xe0
[  771.665285]  do_syscall_64+0xa4/0xfc0
[  771.665287]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  771.665288] RIP: 0033:0x7f8f0e02ec5e
[  771.665290] 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
[  771.665291] RSP: 002b:00007ffd50482630 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[  771.665292] RAX: ffffffffffffffda RBX: 000055b8cdc7d2c0 RCX: 00007f8f0e02ec5e
[  771.665292] RDX: 0000000000000001 RSI: 000055b8cdc7d2c0 RDI: 0000000000000001
[  771.665292] RBP: 00007ffd50482640 R08: 0000000000000000 R09: 0000000000000000
[  771.665293] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001
[  771.665293] R13: 000055b8cdc3e010 R14: 0000000000000001 R15: 000055b8cdc7d2c0
[  771.665294]  </TASK>
[  771.665294] handlers:
[  771.666664] [<00000000c9dad3c5>] serial8250_interrupt
[  771.666698] Disabling IRQ #51