[ 1209.116678][    C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 1209.117037][    C3] CPU: 3 PID: 5964 Comm: perl Not tainted 6.10.0-rc4-virtme #1
[ 1209.117304][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1209.117680][    C3] Call Trace:
[ 1209.117824][    C3]  <IRQ>
[ 1209.117916][    C3]  dump_stack_lvl+0x82/0xd0
[ 1209.118101][    C3]  __report_bad_irq+0x5f/0x180
[ 1209.118279][    C3]  note_interrupt+0x6b3/0x860
[ 1209.118463][    C3]  handle_irq_event+0x16d/0x1c0
[ 1209.118638][    C3]  handle_edge_irq+0x1fa/0xb60
[ 1209.118824][    C3]  __common_interrupt+0x82/0x170
[ 1209.119000][    C3]  common_interrupt+0x7e/0x90
[ 1209.119174][    C3]  </IRQ>
[ 1209.119263][    C3]  <TASK>
[ 1209.119350][    C3]  asm_common_interrupt+0x26/0x40
[ 1209.119515][    C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 1209.119732][    C3] Code: 10 e8 41 4c 92 fd 48 89 ef e8 b9 bc 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 15 ac 26 59 <74> 0e 5b 5d c3 cc cc cc cc e8 0f 2e b6 fd eb dc 0f 1f 44 00 00 5b
[ 1209.120321][    C3] RSP: 0018:ffffc90000c4fab8 EFLAGS: 00000286
[ 1209.120541][    C3] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff53f0333
[ 1209.120802][    C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffa6dd1c41
[ 1209.121063][    C3] RBP: ffffffffaa843020 R08: 0000000000000001 R09: fffffbfff53eb4a8
[ 1209.121325][    C3] R10: ffffffffa9f5a547 R11: 0000000000000000 R12: ffffffffaa843128
[ 1209.121580][    C3] R13: ffff8880077ce400 R14: ffffffffaa843020 R15: 0000000000000282
[ 1209.121840][    C3]  ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 1209.122065][    C3]  uart_write+0x13e/0x320
[ 1209.122197][    C3]  process_output_block+0x13e/0x790
[ 1209.122367][    C3]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 1209.122581][    C3]  n_tty_write+0x412/0x7a0
[ 1209.122759][    C3]  ? __pfx_n_tty_write+0x10/0x10
[ 1209.122932][    C3]  ? trace_lock_acquire+0x14d/0x1f0
[ 1209.123100][    C3]  ? __pfx_woken_wake_function+0x10/0x10
[ 1209.123269][    C3]  ? iterate_tty_write+0x95/0x540
[ 1209.123445][    C3]  ? lock_acquire+0x32/0xc0
[ 1209.123614][    C3]  ? iterate_tty_write+0x95/0x540
[ 1209.123788][    C3]  iterate_tty_write+0x228/0x540
[ 1209.123958][    C3]  ? tty_ldisc_ref_wait+0x28/0x80
[ 1209.124133][    C3]  file_tty_write.constprop.0+0x1db/0x370
[ 1209.124308][    C3]  vfs_write+0xa18/0x10b0
[ 1209.124438][    C3]  ? do_raw_spin_lock+0x131/0x270
[ 1209.124606][    C3]  ? __pfx_vfs_write+0x10/0x10
[ 1209.124776][    C3]  ? lockdep_hardirqs_on_prepare+0x12b/0x410
[ 1209.124995][    C3]  ? __fget_light+0x53/0x1e0
[ 1209.125177][    C3]  ksys_write+0xf5/0x1e0
[ 1209.125306][    C3]  ? __pfx_ksys_write+0x10/0x10
[ 1209.125472][    C3]  ? __local_bh_enable+0x80/0x90
[ 1209.125649][    C3]  ? handle_softirqs+0x331/0x5c0
[ 1209.125823][    C3]  do_syscall_64+0xc1/0x1d0
[ 1209.125993][    C3]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 1209.126199][    C3] RIP: 0033:0x7f46e8c9f957
[ 1209.126381][    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
[ 1209.126957][    C3] RSP: 002b:00007ffe78c524b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1209.127217][    C3] RAX: ffffffffffffffda RBX: 00005575810871d0 RCX: 00007f46e8c9f957
[ 1209.127460][    C3] RDX: 0000000000000001 RSI: 00005575810871d0 RDI: 0000000000000001
[ 1209.127704][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 1209.127947][    C3] R10: 0000000000000001 R11: 0000000000000246 R12: 00005575810735c0
[ 1209.128191][    C3] R13: 00005575810542a0 R14: 0000000000000001 R15: 00005575810735c0
[ 1209.128448][    C3]  </TASK>
[ 1209.128582][    C3] handlers:
[ 1209.128793][    C3] [<ffffffffa56f6e90>] serial8250_interrupt
[ 1209.129139][    C3] Disabling IRQ #4