[  936.049617][    C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[  936.050162][    C3] CPU: 3 PID: 3392 Comm: perl Not tainted 6.9.0-virtme #1
[  936.050455][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  936.050838][    C3] Call Trace:
[  936.050971][    C3]  <IRQ>
[  936.051063][    C3]  dump_stack_lvl+0x82/0xd0
[  936.051272][    C3]  __report_bad_irq+0x5f/0x180
[  936.051523][    C3]  note_interrupt+0x6b3/0x860
[  936.051811][    C3]  handle_irq_event+0x16d/0x1c0
[  936.052064][    C3]  handle_edge_irq+0x1fa/0xb60
[  936.052329][    C3]  __common_interrupt+0x82/0x170
[  936.052593][    C3]  common_interrupt+0x7e/0x90
[  936.052815][    C3]  </IRQ>
[  936.052916][    C3]  <TASK>
[  936.053021][    C3]  asm_common_interrupt+0x26/0x40
[  936.053192][    C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[  936.053504][    C3] Code: 10 e8 11 b1 93 fd 48 89 ef e8 89 21 94 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 85 11 88 57 <74> 0e 5b 5d c3 cc cc cc cc e8 2f 91 b7 fd eb dc 0f 1f 44 00 00 5b
[  936.054336][    C3] RSP: 0018:ffffc9000075fac0 EFLAGS: 00000286
[  936.054658][    C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff572f133
[  936.055044][    C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffa87bb691
[  936.055379][    C3] RBP: ffffffffac23a020 R08: 0000000000000001 R09: fffffbfff572a2a8
[  936.055659][    C3] R10: ffffffffab951547 R11: 0000000000000000 R12: 0000000000000001
[  936.055955][    C3] R13: 0000000000000282 R14: ffffffffac23a020 R15: ffff8880059fa000
[  936.056220][    C3]  ? _raw_spin_unlock_irqrestore+0x51/0x70
[  936.056447][    C3]  uart_write+0x13d/0x330
[  936.056582][    C3]  process_output_block+0x13e/0x790
[  936.056748][    C3]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[  936.056968][    C3]  n_tty_write+0x412/0x7a0
[  936.057150][    C3]  ? __pfx_n_tty_write+0x10/0x10
[  936.057334][    C3]  ? trace_lock_acquire+0x14d/0x1f0
[  936.057503][    C3]  ? __pfx_woken_wake_function+0x10/0x10
[  936.057673][    C3]  ? iterate_tty_write+0x95/0x540
[  936.057852][    C3]  ? lock_acquire+0x32/0xc0
[  936.058024][    C3]  ? iterate_tty_write+0x95/0x540
[  936.058207][    C3]  iterate_tty_write+0x228/0x540
[  936.058383][    C3]  ? tty_ldisc_ref_wait+0x28/0x80
[  936.058563][    C3]  file_tty_write.constprop.0+0x1db/0x370
[  936.058742][    C3]  vfs_write+0xa18/0x10b0
[  936.058870][    C3]  ? __pfx_lock_acquire.part.0+0x10/0x10
[  936.059038][    C3]  ? __pfx_vfs_write+0x10/0x10
[  936.059213][    C3]  ? clockevents_program_event+0xf6/0x300
[  936.059390][    C3]  ? __fget_light+0x53/0x1e0
[  936.059563][    C3]  ? clockevents_program_event+0x1ea/0x300
[  936.059797][    C3]  ksys_write+0xf5/0x1e0
[  936.059928][    C3]  ? __pfx_ksys_write+0x10/0x10
[  936.060104][    C3]  do_syscall_64+0xc1/0x1d0
[  936.060273][    C3]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  936.060488][    C3] RIP: 0033:0x7f000ba44957
[  936.060667][    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
[  936.061226][    C3] RSP: 002b:00007ffd768448d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  936.061468][    C3] RAX: ffffffffffffffda RBX: 000056429620a310 RCX: 00007f000ba44957
[  936.061703][    C3] RDX: 0000000000000001 RSI: 000056429620a310 RDI: 0000000000000001
[  936.061939][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[  936.062182][    C3] R10: 0000000000000001 R11: 0000000000000246 R12: 00005642961f6500
[  936.062413][    C3] R13: 00005642961d72a0 R14: 0000000000000001 R15: 00005642961f6500
[  936.062653][    C3]  </TASK>
[  936.062772][    C3] handlers:
[  936.062891][    C3] [<ffffffffa70f3ed0>] serial8250_interrupt
[  936.063222][    C3] Disabling IRQ #4