Apr 14 07:31:24 14333 kernel: [843556.475850] INFO: rcu_sched detected stalls on CPUs/tasks:
Apr 14 07:31:24 14333 kernel: [843556.475854]   0-...!: (1 GPs behind) idle=ffa/1/0 softirq=7326149/7326150 fqs=0 
Apr 14 07:31:24 14333 kernel: [843556.475855]   (detected by 1, t=34565 jiffies, g=5573741, c=5573740, q=262)
Apr 14 07:31:24 14333 kernel: [843556.475859] Sending NMI from CPU 1 to CPUs 0:
Apr 14 07:31:24 14333 kernel: [843556.476867] NMI backtrace for cpu 0
Apr 14 07:31:24 14333 kernel: [843556.476868] CPU: 0 PID: 0 Comm: swapper/0 Tainted: P           O L   4.15.0-47-generic #50-Ubuntu
Apr 14 07:31:24 14333 kernel: [843556.476869] Hardware name:  BHYVE, BIOS 1.00 03/14/2014
Apr 14 07:31:24 14333 kernel: [843556.476869] RIP: 0010:io_serial_in+0x18/0x20
Apr 14 07:31:24 14333 kernel: [843556.476869] RSP: 0018:ffff9b1a3fc03c10 EFLAGS: 00000002
Apr 14 07:31:24 14333 kernel: [843556.476870] RAX: 0000000084a02960 RBX: ffffffff85efee20 RCX: 0000000000000000
Apr 14 07:31:24 14333 kernel: [843556.476871] RDX: 00000000000003fd RSI: 0000000000000005 RDI: ffffffff85efee20
Apr 14 07:31:24 14333 kernel: [843556.476872] RBP: ffff9b1a3fc03c10 R08: 0000000000000000 R09: 0000000000001d7d
Apr 14 07:31:24 14333 kernel: [843556.476872] R10: 000000000000003e R11: ffffffff85d5380e R12: 0000000000002710
Apr 14 07:31:24 14333 kernel: [843556.476873] R13: 0000000000000020 R14: ffffffff85d53818 R15: ffffffff85efee20
Apr 14 07:31:24 14333 kernel: [843556.476873] FS:  0000000000000000(0000) GS:ffff9b1a3fc00000(0000) knlGS:0000000000000000
Apr 14 07:31:24 14333 kernel: [843556.476874] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Apr 14 07:31:24 14333 kernel: [843556.476874] CR2: 000000c4202c5000 CR3: 000000002140a003 CR4: 00000000000606f0
Apr 14 07:31:24 14333 kernel: [843556.476874] Call Trace:
Apr 14 07:31:24 14333 kernel: [843556.476875]  <IRQ>
Apr 14 07:31:24 14333 kernel: [843556.476875]  wait_for_xmitr+0x47/0xb0
Apr 14 07:31:24 14333 kernel: [843556.476875]  serial8250_console_putchar+0x1c/0x40
Apr 14 07:31:24 14333 kernel: [843556.476876]  ? wait_for_xmitr+0xb0/0xb0
Apr 14 07:31:24 14333 kernel: [843556.476876]  uart_console_write+0x4c/0x60
Apr 14 07:31:24 14333 kernel: [843556.476876]  serial8250_console_write+0x10a/0x2a0
Apr 14 07:31:25 14333 kernel: [843556.476877]  ? msg_print_text+0x80/0x100
Apr 14 07:31:25 14333 kernel: [843556.476877]  univ8250_console_write+0x25/0x30
Apr 14 07:31:25 14333 kernel: [843556.476877]  console_unlock+0x34b/0x4e0
Apr 14 07:31:25 14333 kernel: [843556.476878]  vprintk_emit+0x333/0x3a0
Apr 14 07:31:25 14333 kernel: [843556.476878]  vprintk_default+0x29/0x50
Apr 14 07:31:25 14333 kernel: [843556.476878]  vprintk_func+0x27/0x60
Apr 14 07:31:25 14333 kernel: [843556.476879]  printk+0x52/0x6e
Apr 14 07:31:25 14333 kernel: [843556.476879]  rcu_check_callbacks+0x6b6/0x900
Apr 14 07:31:25 14333 kernel: [843556.476879]  ? update_wall_time+0x474/0x6f0
Apr 14 07:31:25 14333 kernel: [843556.476880]  ? tick_sched_do_timer+0x50/0x50
Apr 14 07:31:25 14333 kernel: [843556.476880]  update_process_times+0x2f/0x60
Apr 14 07:31:25 14333 kernel: [843556.476880]  tick_sched_handle+0x26/0x70
Apr 14 07:31:25 14333 kernel: [843556.476881]  ? tick_sched_do_timer+0x3f/0x50
Apr 14 07:31:25 14333 kernel: [843556.476881]  tick_sched_timer+0x39/0x80
Apr 14 07:31:25 14333 kernel: [843556.476881]  __hrtimer_run_queues+0xdf/0x230
Apr 14 07:31:25 14333 kernel: [843556.476882]  hrtimer_interrupt+0xa0/0x1d0
Apr 14 07:31:25 14333 kernel: [843556.476882]  smp_apic_timer_interrupt+0x6f/0x130
Apr 14 07:31:25 14333 kernel: [843556.476882]  apic_timer_interrupt+0x84/0x90
Apr 14 07:31:25 14333 kernel: [843556.476883]  </IRQ>
Apr 14 07:31:25 14333 kernel: [843556.476883] RIP: 0010:native_safe_halt+0x6/0x10
Apr 14 07:31:25 14333 kernel: [843556.476883] RSP: 0018:ffffffff85803e28 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff11
Apr 14 07:31:25 14333 kernel: [843556.476884] RAX: ffffffff84da0060 RBX: 0000000000000000 RCX: 0000000000000000
Apr 14 07:31:25 14333 kernel: [843556.476885] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
Apr 14 07:31:25 14333 kernel: [843556.476885] RBP: ffffffff85803e28 R08: 0000000000000002 R09: 0000000000000001
Apr 14 07:31:25 14333 kernel: [843556.476885] R10: ffffffff85803da0 R11: 0000000000000000 R12: 0000000000000000
Apr 14 07:31:25 14333 kernel: [843556.476886] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Apr 14 07:31:25 14333 kernel: [843556.476886]  ? __cpuidle_text_start+0x8/0x8
Apr 14 07:31:25 14333 kernel: [843556.476886]  default_idle+0x20/0x100
Apr 14 07:31:25 14333 kernel: [843556.476887]  arch_cpu_idle+0x15/0x20
Apr 14 07:31:25 14333 kernel: [843556.476887]  default_idle_call+0x23/0x30
Apr 14 07:31:25 14333 kernel: [843556.476887]  do_idle+0x172/0x1f0
Apr 14 07:31:25 14333 kernel: [843556.476888]  cpu_startup_entry+0x73/0x80
Apr 14 07:31:25 14333 kernel: [843556.476888]  rest_init+0xae/0xb0
Apr 14 07:31:25 14333 kernel: [843556.476888]  start_kernel+0x4dc/0x4fd
Apr 14 07:31:25 14333 kernel: [843556.476889]  x86_64_start_reservations+0x24/0x26
Apr 14 07:31:25 14333 kernel: [843556.476889]  x86_64_start_kernel+0x74/0x77
Apr 14 07:31:25 14333 kernel: [843556.476889]  secondary_startup_64+0xa5/0xb0
Apr 14 07:31:25 14333 kernel: [843556.476890] Code: 48 89 e5 d3 e6 48 63 f6 48 03 77 10 8b 06 5d c3 0f 1f 00 0f 1f 44 00 00 0f b6 8f a1 00 00 00 8b 57 08 55 48 89 e5 d3 e6 01 f2 ec <0f> b6 c0 5d c3 0f 1f 00 0f 1f 44 00 00 0f b6 8f a1 00 00 00 89 
Apr 14 07:31:25 14333 kernel: [843556.476904] rcu_sched kthread starved for 34565 jiffies! g5573741 c5573740 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=1
Apr 14 07:31:25 14333 kernel: [843556.476905] rcu_sched       I    0     8      2 0x80000000
Apr 14 07:31:25 14333 kernel: [843556.476908] Call Trace:
Apr 14 07:31:25 14333 kernel: [843556.476917]  __schedule+0x291/0x8a0
Apr 14 07:31:25 14333 kernel: [843556.476921]  ? __switch_to_asm+0x34/0x70
Apr 14 07:31:25 14333 kernel: [843556.476923]  ? __switch_to_asm+0x40/0x70
Apr 14 07:31:25 14333 kernel: [843556.476924]  schedule+0x2c/0x80
Apr 14 07:31:25 14333 kernel: [843556.476926]  schedule_timeout+0x15d/0x350
Apr 14 07:31:25 14333 kernel: [843556.476932]  ? __next_timer_interrupt+0xe0/0xe0
Apr 14 07:31:25 14333 kernel: [843556.476934]  rcu_gp_kthread+0x53a/0x960
Apr 14 07:31:25 14333 kernel: [843556.476938]  kthread+0x121/0x140
Apr 14 07:31:25 14333 kernel: [843556.476940]  ? rcu_note_context_switch+0x150/0x150
Apr 14 07:31:25 14333 kernel: [843556.476942]  ? kthread_create_worker_on_cpu+0x70/0x70
Apr 14 07:31:25 14333 kernel: [843556.476944]  ret_from_fork+0x35/0x40
Apr 14 07:31:25 14333 kernel: [843556.477839] NMI backtrace for cpu 0
Apr 14 07:31:25 14333 kernel: [843556.477839] CPU: 0 PID: 0 Comm: swapper/0 Tainted: P           O L   4.15.0-47-generic #50-Ubuntu
Apr 14 07:31:25 14333 kernel: [843556.477839] Hardware name:  BHYVE, BIOS 1.00 03/14/2014
Apr 14 07:31:25 14333 kernel: [843556.477839] Call Trace:
Apr 14 07:31:25 14333 kernel: [843556.477839]  <IRQ>
Apr 14 07:31:25 14333 kernel: [843556.477839]  dump_stack+0x63/0x8b
Apr 14 07:31:25 14333 kernel: [843556.477839]  nmi_cpu_backtrace+0xca/0xd0
Apr 14 07:31:25 14333 kernel: [843556.477839]  ? lapic_can_unplug_cpu+0xb0/0xb0
Apr 14 07:31:25 14333 kernel: [843556.477839]  nmi_trigger_cpumask_backtrace+0xe6/0x130
Apr 14 07:31:25 14333 kernel: [843556.477839]  arch_trigger_cpumask_backtrace+0x19/0x20
Apr 14 07:31:25 14333 kernel: [843556.477839]  rcu_dump_cpu_stacks+0xa3/0xdb
Apr 14 07:31:25 14333 kernel: [843556.477839]  rcu_check_callbacks+0x6c6/0x900
Apr 14 07:31:25 14333 kernel: [843556.477839]  ? update_wall_time+0x474/0x6f0
Apr 14 07:31:25 14333 kernel: [843556.477839]  ? tick_sched_do_timer+0x50/0x50
Apr 14 07:31:25 14333 kernel: [843556.477839]  update_process_times+0x2f/0x60
Apr 14 07:31:25 14333 kernel: [843556.477839]  tick_sched_handle+0x26/0x70
Apr 14 07:31:25 14333 kernel: [843556.477839]  ? tick_sched_do_timer+0x3f/0x50
Apr 14 07:31:25 14333 kernel: [843556.477839]  tick_sched_timer+0x39/0x80
Apr 14 07:31:25 14333 kernel: [843556.477839]  __hrtimer_run_queues+0xdf/0x230
Apr 14 07:31:25 14333 kernel: [843556.477839]  hrtimer_interrupt+0xa0/0x1d0
Apr 14 07:31:25 14333 kernel: [843556.477839]  smp_apic_timer_interrupt+0x6f/0x130
Apr 14 07:31:25 14333 kernel: [843556.477839]  apic_timer_interrupt+0x84/0x90
Apr 14 07:31:25 14333 kernel: [843556.477839]  </IRQ>
Apr 14 07:31:25 14333 kernel: [843556.477839] RIP: 0010:native_safe_halt+0x6/0x10
Apr 14 07:31:25 14333 kernel: [843556.477839] RSP: 0018:ffffffff85803e28 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff11
Apr 14 07:31:25 14333 kernel: [843556.477839] RAX: ffffffff84da0060 RBX: 0000000000000000 RCX: 0000000000000000
Apr 14 07:31:25 14333 kernel: [843556.477839] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
Apr 14 07:31:25 14333 kernel: [843556.477839] RBP: ffffffff85803e28 R08: 0000000000000002 R09: 0000000000000001
Apr 14 07:31:25 14333 kernel: [843556.477839] R10: ffffffff85803da0 R11: 0000000000000000 R12: 0000000000000000
Apr 14 07:31:25 14333 kernel: [843556.477839] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Apr 14 07:31:25 14333 kernel: [843556.477839]  ? __cpuidle_text_start+0x8/0x8
Apr 14 07:31:25 14333 kernel: [843556.477839]  default_idle+0x20/0x100
Apr 14 07:31:25 14333 kernel: [843556.477839]  arch_cpu_idle+0x15/0x20
Apr 14 07:31:25 14333 kernel: [843556.477839]  default_idle_call+0x23/0x30
Apr 14 07:31:25 14333 kernel: [843556.477839]  do_idle+0x172/0x1f0
Apr 14 07:31:25 14333 kernel: [843556.477839]  cpu_startup_entry+0x73/0x80
Apr 14 07:31:25 14333 kernel: [843556.477839]  rest_init+0xae/0xb0
Apr 14 07:31:25 14333 kernel: [843556.477839]  start_kernel+0x4dc/0x4fd
Apr 14 07:31:25 14333 kernel: [843556.477839]  x86_64_start_reservations+0x24/0x26
Apr 14 07:31:25 14333 kernel: [843556.477839]  x86_64_start_kernel+0x74/0x77
Apr 14 07:31:25 14333 kernel: [843556.477839]  secondary_startup_64+0xa5/0xb0