[ 1215.494066][    C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 1215.494504][    C3] CPU: 3 PID: 6323 Comm: perl Not tainted 6.10.0-rc4-virtme #1
[ 1215.494763][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1215.495141][    C3] Call Trace:
[ 1215.495282][    C3]  <IRQ>
[ 1215.495379][    C3]  dump_stack_lvl+0x82/0xd0
[ 1215.495575][    C3]  __report_bad_irq+0x5f/0x180
[ 1215.495759][    C3]  note_interrupt+0x6b3/0x860
[ 1215.495943][    C3]  handle_irq_event+0x16d/0x1c0
[ 1215.496118][    C3]  handle_edge_irq+0x1fa/0xb60
[ 1215.496300][    C3]  __common_interrupt+0x82/0x170
[ 1215.496481][    C3]  common_interrupt+0x7e/0x90
[ 1215.496661][    C3]  </IRQ>
[ 1215.496757][    C3]  <TASK>
[ 1215.496859][    C3]  asm_common_interrupt+0x26/0x40
[ 1215.497035][    C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 1215.497260][    C3] Code: 10 e8 c1 4c 92 fd 48 89 ef e8 39 bd 92 fd 81 e3 00 02 00 00 75 1d 9c 58 f6 c4 02 75 29 48 85 db 74 01 fb 65 ff 0d 95 ac a6 6d <74> 0e 5b 5d c3 cc cc cc cc e8 8f 2e b6 fd eb dc 0f 1f 44 00 00 5b
[ 1215.497885][    C3] RSP: 0018:ffffc90000fffab8 EFLAGS: 00000286
[ 1215.498105][    C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff2af031a
[ 1215.498365][    C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff925d1bc1
[ 1215.498616][    C3] RBP: ffffffff96043020 R08: 0000000000000001 R09: fffffbfff2aeb4a8
[ 1215.498887][    C3] R10: ffffffff9575a547 R11: 0000000000000000 R12: ffffffff96043128
[ 1215.499148][    C3] R13: ffff8880047b0400 R14: ffffffff96043020 R15: 0000000000000282
[ 1215.499409][    C3]  ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 1215.499630][    C3]  uart_write+0x13e/0x320
[ 1215.499770][    C3]  process_output_block+0x13e/0x790
[ 1215.499959][    C3]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 1215.500174][    C3]  n_tty_write+0x412/0x7a0
[ 1215.500357][    C3]  ? __pfx_n_tty_write+0x10/0x10
[ 1215.500529][    C3]  ? trace_lock_acquire+0x14d/0x1f0
[ 1215.500706][    C3]  ? __pfx_woken_wake_function+0x10/0x10
[ 1215.500893][    C3]  ? iterate_tty_write+0x95/0x540
[ 1215.501066][    C3]  ? lock_acquire+0x32/0xc0
[ 1215.501240][    C3]  ? iterate_tty_write+0x95/0x540
[ 1215.501418][    C3]  iterate_tty_write+0x228/0x540
[ 1215.501592][    C3]  ? tty_ldisc_ref_wait+0x28/0x80
[ 1215.501772][    C3]  file_tty_write.constprop.0+0x1db/0x370
[ 1215.501958][    C3]  vfs_write+0xa18/0x10b0
[ 1215.502100][    C3]  ? do_raw_spin_lock+0x131/0x270
[ 1215.502277][    C3]  ? __pfx_vfs_write+0x10/0x10
[ 1215.502455][    C3]  ? lockdep_hardirqs_on_prepare+0x12b/0x410
[ 1215.502675][    C3]  ? __fget_light+0x53/0x1e0
[ 1215.502855][    C3]  ksys_write+0xf5/0x1e0
[ 1215.502992][    C3]  ? __pfx_ksys_write+0x10/0x10
[ 1215.503166][    C3]  ? __local_bh_enable+0x80/0x90
[ 1215.503352][    C3]  ? handle_softirqs+0x331/0x5c0
[ 1215.503536][    C3]  do_syscall_64+0xc1/0x1d0
[ 1215.503715][    C3]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 1215.503924][    C3] RIP: 0033:0x7f4719292957
[ 1215.504105][    C3] Code: 0b 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
[ 1215.504709][    C3] RSP: 002b:00007ffc98446698 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1215.505007][    C3] RAX: ffffffffffffffda RBX: 000055bc56f5d1d0 RCX: 00007f4719292957
[ 1215.505258][    C3] RDX: 0000000000000001 RSI: 000055bc56f5d1d0 RDI: 0000000000000001
[ 1215.505507][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 1215.505753][    C3] R10: 0000000000000001 R11: 0000000000000246 R12: 000055bc56f495c0
[ 1215.506006][    C3] R13: 000055bc56f2a2a0 R14: 0000000000000001 R15: 000055bc56f495c0
[ 1215.506276][    C3]  </TASK>
[ 1215.506407][    C3] handlers:
[ 1215.506541][    C3] [<ffffffff90ef6ea0>] serial8250_interrupt
[ 1215.507337][    C3] Disabling IRQ #4