Comment 1 for bug 1939108

[ 0.000000] Linux version 5.3.0-26-generic (buildd@lgw01-amd64-039) (gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1)) #28~18.04.1-Ubuntu SMP Wed Dec 18 16:40:14 UTC 2019 (Ubuntu 5.3.0-26.28~18.04.1-generic 5.3.13)
[ 0.000000] Command line: LABEL=cirros-rootfs ro console=tty1 console=ttyS0
[ 0.000000] KERNEL supported cpus:
[ 0.000000] Intel GenuineIntel
[ 0.000000] AMD AuthenticAMD
[ 0.000000] Hygon HygonGenuine
[ 0.000000] Centaur CentaurHauls
[ 0.000000] zhaoxin Shanghai
[ 0.000000] x86/fpu: x87 FPU will use FXSAVE
[ 0.000000] BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
[ 0.000000] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x0000000007fdcfff] usable
[ 0.000000] BIOS-e820: [mem 0x0000000007fdd000-0x0000000007ffffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fffc0000-0x00000000ffffffff] reserved
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] SMBIOS 2.8 present.
[ 0.000000] DMI: OpenStack Foundation OpenStack Nova, BIOS 1.13.0-1ubuntu1.1 04/01/2014
[ 0.000000] tsc: Fast TSC calibration using PIT
[ 0.000000] tsc: Detected 2394.452 MHz processor
[ 0.026481] last_pfn = 0x7fdd max_arch_pfn = 0x400000000
[ 0.028543] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT
[ 0.059293] found SMP MP-table at [mem 0x000f5c90-0x000f5c9f]
[ 0.080002] check: Scanning 1 areas for low memory corruption
[ 0.087928] RAMDISK: [mem 0x0798e000-0x07fccfff]
[ 0.088855] ACPI: Early table checksum verification disabled
[ 0.089662] ACPI: RSDP 0x00000000000F5AA0 000014 (v00 BOCHS )
[ 0.090108] ACPI: RSDT 0x0000000007FE153C 000030 (v01 BOCHS BXPCRSDT 00000001 BXPC 00000001)
[ 0.091295] ACPI: FACP 0x0000000007FE1418 000074 (v01 BOCHS BXPCFACP 00000001 BXPC 00000001)
[ 0.092403] ACPI: DSDT 0x0000000007FE0040 0013D8 (v01 BOCHS BXPCDSDT 00000001 BXPC 00000001)
[ 0.092593] ACPI: FACS 0x0000000007FE0000 000040
[ 0.092735] ACPI: APIC 0x0000000007FE148C 000078 (v01 BOCHS BXPCAPIC 00000001 BXPC 00000001)
[ 0.092800] ACPI: HPET 0x0000000007FE1504 000038 (v01 BOCHS BXPCHPET 00000001 BXPC 00000001)
[ 0.096602] No NUMA configuration found
[ 0.096673] Faking a node at [mem 0x0000000000000000-0x0000000007fdcfff]
[ 0.097804] NODE_DATA(0) allocated [mem 0x07963000-0x0798dfff]
[ 0.104051] Zone ranges:
[ 0.104153] DMA [mem 0x0000000000001000-0x0000000000ffffff]
[ 0.104229] DMA32 [mem 0x0000000001000000-0x0000000007fdcfff]
[ 0.104250] Normal empty
[ 0.104279] Device empty
[ 0.104302] Movable zone start for each node
[ 0.104370] Early memory node ranges
[ 0.104422] node 0: [mem 0x0000000000001000-0x000000000009efff]
[ 0.104679] node 0: [mem 0x0000000000100000-0x0000000007fdcfff]
[ 0.105220] Zeroed struct page in unavailable ranges: 98 pages
[ 0.105486] Initmem setup node 0 [mem 0x0000000000001000-0x0000000007fdcfff]
[ 0.113353] ACPI: PM-Timer IO Port: 0x608
[ 0.114155] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
[ 0.114823] IOAPIC[0]: apic_id 0, version 32, address 0xfec00000, GSI 0-23
[ 0.115040] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[ 0.115571] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
[ 0.115640] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.115877] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
[ 0.115926] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
[ 0.116354] Using ACPI (MADT) for SMP configuration information
[ 0.116446] ACPI: HPET id: 0x8086a201 base: 0xfed00000
[ 0.117087] smpboot: Allowing 1 CPUs, 0 hotplug CPUs
[ 0.118442] PM: Registered nosave memory: [mem 0x00000000-0x00000fff]
[ 0.118560] PM: Registered nosave memory: [mem 0x0009f000-0x0009ffff]
[ 0.118604] PM: Registered nosave memory: [mem 0x000a0000-0x000effff]
[ 0.118620] PM: Registered nosave memory: [mem 0x000f0000-0x000fffff]
[ 0.118805] [mem 0x08000000-0xfffbffff] available for PCI devices
[ 0.118874] Booting paravirtualized kernel on bare hardware
[ 0.119527] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645519600211568 ns
[ 0.120341] setup_percpu: NR_CPUS:8192 nr_cpumask_bits:1 nr_cpu_ids:1 nr_node_ids:1
[ 0.132893] percpu: Embedded 54 pages/cpu s184320 r8192 d28672 u2097152
[ 0.137042] Built 1 zonelists, mobility grouping on. Total pages: 32102
[ 0.137081] Policy zone: DMA32
[ 0.137390] Kernel command line: LABEL=cirros-rootfs ro console=tty1 console=ttyS0
[ 0.139937] Dentry cache hash table entries: 16384 (order: 5, 131072 bytes, linear)
[ 0.140361] Inode-cache hash table entries: 8192 (order: 4, 65536 bytes, linear)
[ 0.142922] mem auto-init: stack:off, heap alloc:on, heap free:off
[ 0.154216] Memory: 88564K/130540K available (14339K kernel code, 2370K rwdata, 4668K rodata, 2660K init, 5076K bss, 41976K reserved, 0K cma-reserved)
[ 0.155470] random: get_random_u64 called from __kmem_cache_create+0x41/0x540 with crng_init=0
[ 0.169726] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.172015] ftrace: allocating 42927 entries in 168 pages
[ 0.312650] rcu: Hierarchical RCU implementation.
[ 0.312817] rcu: RCU restricting CPUs from NR_CPUS=8192 to nr_cpu_ids=1.
[ 0.312948] Tasks RCU enabled.
[ 0.313023] rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
[ 0.313067] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1
[ 0.345147] NR_IRQS: 524544, nr_irqs: 256, preallocated irqs: 16
[ 0.363395] Console: colour VGA+ 80x25
[ 0.368516] printk: console [tty1] enabled
[ 0.387973] printk: console [ttyS0] enabled
[ 0.389502] ACPI: Core revision 20190703
[ 0.397050] clocksource: hpet: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604467 ns
[ 0.399659] APIC: Switch to symmetric I/O mode setup
[ 0.405993] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[ 0.473819] ..MP-BIOS bug: 8254 timer not connected to IO-APIC
[ 0.474106] ...trying to set up timer (IRQ0) through the 8259A ...
[ 0.474428] ..... (found apic 0 pin 2) ...
[ 0.541777] ....... failed.
[ 0.542187] ...trying to set up timer as Virtual Wire IRQ...
[ 0.609633] ..... failed.
[ 0.609861] ...trying to set up timer as ExtINT IRQ...
[ 2.015089] ..... failed :(.
[ 2.015512] Kernel panic - not syncing: IO-APIC + timer doesn't work! Boot with apic=debug and send a report. Then try booting with the 'noapic' option.
[ 2.016274] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0-26-generic #28~18.04.1-Ubuntu
[ 2.016575] Hardware name: OpenStack Foundation OpenStack Nova, BIOS 1.13.0-1ubuntu1.1 04/01/2014
[ 2.017025] Call Trace:
[ 2.018195] dump_stack+0x6d/0x95
[ 2.018429] panic+0xfe/0x2d4
[ 2.018634] check_timer+0x5e8/0x685
[ 2.018799] ? radix_tree_lookup+0xd/0x10
[ 2.019005] setup_IO_APIC+0x182/0x1ca
[ 2.019167] apic_intr_mode_init+0x1f5/0x1f8
[ 2.019351] x86_late_time_init+0x1b/0x22
[ 2.019518] start_kernel+0x4cb/0x58b
[ 2.019725] x86_64_start_reservations+0x24/0x26
[ 2.019901] x86_64_start_kernel+0x74/0x77
[ 2.020095] secondary_startup_64+0xa4/0xb0
[ 2.021474] ---[ end Kernel panic - not syncing: IO-APIC + timer doesn't work! Boot with apic=debug and send a report. Then try booting with the 'noapic' option. ]---
}}}