The disco story is not so pretty: [ 0.000000] Linux version 5.0.0-34-generic (buildd@lgw01-amd64-051) (gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1)) #36~18.04.1-Ubuntu SMP Wed Oct 30 08:08:56 UTC 2019 (Ubuntu 5.0.0-34.36~18.04.1-generic 5.0.21) [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-5.0.0-34-generic root=UUID=e3626652-82d8-4e95-a6d7-e4920d7941b6 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] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers' [ 0.000000] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers' [ 0.000000] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers' [ 0.000000] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256 [ 0.000000] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format. [ 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 0x0000000000100000-0x000000001ffd7fff] usable [ 0.000000] BIOS-e820: [mem 0x000000001ffd8000-0x000000001fffffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000feffc000-0x00000000feffffff] 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 1.10.2-1ubuntu1 04/01/2014 [ 0.000000] Hypervisor detected: KVM [ 0.000000] kvm-clock: Using msrs 4b564d01 and 4b564d00 [ 0.000000] kvm-clock: cpu 0, msr e601001, primary cpu clock [ 0.000000] kvm-clock: using sched offset of 79214193145 cycles [ 0.000002] clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns [ 0.000004] tsc: Detected 2298.666 MHz processor [ 0.002336] last_pfn = 0x1ffd8 max_arch_pfn = 0x400000000 [ 0.002446] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT [ 0.008265] found SMP MP-table at [mem 0x000f6a60-0x000f6a6f] [ 0.008362] check: Scanning 1 areas for low memory corruption [ 0.008413] Using GB pages for direct mapping [ 0.008561] RAMDISK: [mem 0x1d8fb000-0x1ecacfff] [ 0.008579] ACPI: Early table checksum verification disabled [ 0.008637] ACPI: RSDP 0x00000000000F6860 000014 (v00 BOCHS ) [ 0.008640] ACPI: RSDT 0x000000001FFE1505 00002C (v01 BOCHS BXPCRSDT 00000001 BXPC 00000001) [ 0.008646] ACPI: FACP 0x000000001FFE1419 000074 (v01 BOCHS BXPCFACP 00000001 BXPC 00000001) [ 0.008654] ACPI: DSDT 0x000000001FFE0040 0013D9 (v01 BOCHS BXPCDSDT 00000001 BXPC 00000001) [ 0.008657] ACPI: FACS 0x000000001FFE0000 000040 [ 0.008660] ACPI: APIC 0x000000001FFE148D 000078 (v01 BOCHS BXPCAPIC 00000001 BXPC 00000001) [ 0.009155] No NUMA configuration found [ 0.009157] Faking a node at [mem 0x0000000000000000-0x000000001ffd7fff] [ 0.009167] NODE_DATA(0) allocated [mem 0x1ffad000-0x1ffd7fff] [ 0.009417] Zone ranges: [ 0.009418] DMA [mem 0x0000000000001000-0x0000000000ffffff] [ 0.009420] DMA32 [mem 0x0000000001000000-0x000000001ffd7fff] [ 0.009421] Normal empty [ 0.009422] Device empty [ 0.009423] Movable zone start for each node [ 0.009427] Early memory node ranges [ 0.009428] node 0: [mem 0x0000000000001000-0x000000000009efff] [ 0.009429] node 0: [mem 0x0000000000100000-0x000000001ffd7fff] [ 0.009433] Zeroed struct page in unavailable ranges: 98 pages [ 0.009434] Initmem setup node 0 [mem 0x0000000000001000-0x000000001ffd7fff] [ 0.013701] ACPI: PM-Timer IO Port: 0x608 [ 0.013719] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1]) [ 0.013776] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23 [ 0.013778] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl) [ 0.013780] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level) [ 0.013781] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level) [ 0.013783] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level) [ 0.013784] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level) [ 0.013789] Using ACPI (MADT) for SMP configuration information [ 0.013792] smpboot: Allowing 1 CPUs, 0 hotplug CPUs [ 0.013814] PM: Registered nosave memory: [mem 0x00000000-0x00000fff] [ 0.013815] PM: Registered nosave memory: [mem 0x0009f000-0x0009ffff] [ 0.013816] PM: Registered nosave memory: [mem 0x000a0000-0x000effff] [ 0.013817] PM: Registered nosave memory: [mem 0x000f0000-0x000fffff] [ 0.013819] [mem 0x20000000-0xfeffbfff] available for PCI devices [ 0.013820] Booting paravirtualized kernel on KVM [ 0.013822] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645519600211568 ns [ 0.013832] random: get_random_bytes called from start_kernel+0x97/0x516 with crng_init=0 [ 0.013837] setup_percpu: NR_CPUS:8192 nr_cpumask_bits:1 nr_cpu_ids:1 nr_node_ids:1 [ 0.014182] percpu: Embedded 46 pages/cpu s151552 r8192 d28672 u2097152 [ 0.014213] KVM setup async PF for cpu 0 [ 0.014222] kvm-stealtime: cpu 0, msr 1f224040 [ 0.014228] Built 1 zonelists, mobility grouping on. Total pages: 128865 [ 0.014229] Policy zone: DMA32 [ 0.014230] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.0.0-34-generic root=UUID=e3626652-82d8-4e95-a6d7-e4920d7941b6 ro console=tty1 console=ttyS0 [ 0.015456] Memory: 461708K/523736K available (14339K kernel code, 2336K rwdata, 4416K rodata, 2588K init, 5192K bss, 62028K reserved, 0K cma-reserved) [ 0.015587] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 [ 0.015600] Kernel/User page tables isolation: enabled [ 0.015621] ftrace: allocating 41677 entries in 163 pages [ 0.035100] rcu: Hierarchical RCU implementation. [ 0.035103] rcu: RCU restricting CPUs from NR_CPUS=8192 to nr_cpu_ids=1. [ 0.035104] Tasks RCU enabled. [ 0.035105] rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies. [ 0.035106] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1 [ 0.038034] NR_IRQS: 524544, nr_irqs: 256, preallocated irqs: 16 [ 0.054327] Console: colour VGA+ 80x25 [ 0.104181] printk: console [tty1] enabled [ 0.279769] printk: console [ttyS0] enabled [ 0.281004] ACPI: Core revision 20181213 [ 0.282258] APIC: Switch to symmetric I/O mode setup [ 0.284030] x2apic enabled [ 0.285340] Switched APIC routing to physical x2apic. [ 0.290787] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1 [ 0.292501] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x212248ec3b8, max_idle_ns: 440795232693 ns [ 0.295273] Calibrating delay loop (skipped) preset value.. 4597.33 BogoMIPS (lpj=9194664) [ 0.297496] pid_max: default: 32768 minimum: 301 [ 0.299304] LSM: Security Framework initializing [ 0.300611] Yama: becoming mindful. [ 0.301682] AppArmor: AppArmor initialized [ 0.303375] Dentry cache hash table entries: 65536 (order: 7, 524288 bytes) [ 0.305272] Inode-cache hash table entries: 32768 (order: 6, 262144 bytes) [ 0.307275] Mount-cache hash table entries: 1024 (order: 1, 8192 bytes) [ 0.309026] Mountpoint-cache hash table entries: 1024 (order: 1, 8192 bytes) [ 0.311389] Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0 [ 0.312848] Last level dTLB entries: 4KB 0, 2MB 0, 4MB 0, 1GB 0 [ 0.314465] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization [ 0.315263] Spectre V2 : Mitigation: Full generic retpoline [ 0.319264] Spectre V2 : Spectre v2 / SpectreRSB mitigation: Filling RSB on context switch [ 0.321601] Spectre V2 : Enabling Restricted Speculation for firmware calls [ 0.323272] Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier [ 0.325666] Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl and seccomp [ 0.327290] MDS: Mitigation: Clear CPU buffers [ 0.340984] Freeing SMP alternatives memory: 36K [ 0.344480] smpboot: CPU0: Intel Core Processor (Haswell, no TSX, IBRS) (family: 0x6, model: 0x3c, stepping: 0x1) [ 0.347260] Performance Events: unsupported p6 CPU model 60 no PMU driver, software events only. [ 0.347316] rcu: Hierarchical SRCU implementation. [ 0.349519] random: crng done (trusting CPU's manufacturer) [ 0.351112] NMI watchdog: Perf NMI watchdog permanently disabled [ 0.351301] smp: Bringing up secondary CPUs ... [ 0.352591] smp: Brought up 1 node, 1 CPU [ 0.353759] smpboot: Max logical packages: 1 [ 0.354976] smpboot: Total of 1 processors activated (4597.33 BogoMIPS) [ 0.355496] devtmpfs: initialized [ 0.356568] x86/mm: Memory block size: 128MB [ 0.358114] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns [ 0.359277] futex hash table entries: 256 (order: 2, 16384 bytes) [ 0.360986] pinctrl core: initialized pinctrl subsystem [ 0.362650] RTC time: 17:28:43, date: 2019-11-08 [ 0.363408] NET: Registered protocol family 16 [ 0.364798] audit: initializing netlink subsys (disabled) [ 0.366432] EISA bus registered [ 0.367273] cpuidle: using governor ladder [ 0.368468] cpuidle: using governor menu [ 0.369668] ACPI: bus type PCI registered [ 0.371268] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 [ 0.373021] audit: type=2000 audit(1573234122.330:1): state=initialized audit_enabled=0 res=1 [ 0.375454] PCI: Using configuration type 1 for base access [ 0.378239] HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages [ 0.379269] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages [ 0.381313] ACPI: Added _OSI(Module Device) [ 0.382537] ACPI: Added _OSI(Processor Device) [ 0.383271] ACPI: Added _OSI(3.0 _SCP Extensions) [ 0.384587] ACPI: Added _OSI(Processor Aggregator Device) [ 0.386101] ACPI: Added _OSI(Linux-Dell-Video) [ 0.387290] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio) [ 0.388779] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics) [ 0.391298] ACPI: 1 ACPI AML tables successfully acquired and loaded [ 0.393726] ACPI: Interpreter enabled [ 0.394837] ACPI: (supports S0 S3 S4 S5) [ 0.395267] ACPI: Using IOAPIC for interrupt routing [ 0.396679] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug [ 0.399581] ACPI: Enabled 2 GPEs in block 00 to 0F [ 0.407164] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff]) [ 0.407281] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI] [ 0.410557] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge. [ 0.411636] acpiphp: Slot [3] registered [ 0.412851] acpiphp: Slot [4] registered [ 0.414046] acpiphp: Slot [5] registered [ 0.415237] acpiphp: Slot [6] registered [ 0.415292] acpiphp: Slot [7] registered [ 0.416506] acpiphp: Slot [8] registered [ 0.417677] acpiphp: Slot [9] registered [ 0.418848] acpiphp: Slot [10] registered [ 0.419291] acpiphp: Slot [11] registered [ 0.420492] acpiphp: Slot [12] registered [ 0.423306] acpiphp: Slot [13] registered [ 0.424589] acpiphp: Slot [14] registered [ 0.425781] acpiphp: Slot [15] registered [ 0.426988] acpiphp: Slot [16] registered [ 0.427292] acpiphp: Slot [17] registered [ 0.428486] acpiphp: Slot [18] registered [ 0.429722] acpiphp: Slot [19] registered [ 0.430908] acpiphp: Slot [20] registered [ 0.431291] acpiphp: Slot [21] registered [ 0.432467] acpiphp: Slot [22] registered [ 0.433677] acpiphp: Slot [23] registered [ 0.434893] acpiphp: Slot [24] registered [ 0.435292] acpiphp: Slot [25] registered [ 0.436510] acpiphp: Slot [26] registered [ 0.437717] acpiphp: Slot [27] registered [ 0.438922] acpiphp: Slot [28] registered [ 0.439292] acpiphp: Slot [29] registered [ 0.440504] acpiphp: Slot [30] registered [ 0.441694] acpiphp: Slot [31] registered [ 0.442887] PCI host bridge to bus 0000:00 [ 0.443269] pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7 window] [ 0.445095] pci_bus 0000:00: root bus resource [io 0x0d00-0xffff window] [ 0.446916] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window] [ 0.447267] pci_bus 0000:00: root bus resource [mem 0x20000000-0xfebfffff window] [ 0.449330] pci_bus 0000:00: root bus resource [mem 0x100000000-0x17fffffff window] [ 0.451266] pci_bus 0000:00: root bus resource [bus 00-ff] [ 0.460086] pci 0000:00:01.1: legacy IDE quirk: reg 0x10: [io 0x01f0-0x01f7] [ 0.462003] pci 0000:00:01.1: legacy IDE quirk: reg 0x14: [io 0x03f6] [ 0.463266] pci 0000:00:01.1: legacy IDE quirk: reg 0x18: [io 0x0170-0x0177] [ 0.465406] pci 0000:00:01.1: legacy IDE quirk: reg 0x1c: [io 0x0376] [ 0.472694] pci 0000:00:01.3: quirk: [io 0x0600-0x063f] claimed by PIIX4 ACPI [ 0.475285] pci 0000:00:01.3: quirk: [io 0x0700-0x070f] claimed by PIIX4 SMB [ 0.590571] ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11) [ 0.591444] ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11) [ 0.593182] ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11) [ 0.594863] ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11) [ 0.595347] ACPI: PCI Interrupt Link [LNKS] (IRQs *9) [ 0.597229] SCSI subsystem initialized [ 0.598531] pci 0000:00:02.0: vgaarb: setting as boot VGA device [ 0.599260] pci 0000:00:02.0: vgaarb: VGA device added: decodes=io+mem,owns=io+mem,locks=none [ 0.599272] pci 0000:00:02.0: vgaarb: bridge control possible [ 0.601495] vgaarb: loaded [ 0.602399] ACPI: bus type USB registered [ 0.603293] usbcore: registered new interface driver usbfs [ 0.607287] usbcore: registered new interface driver hub [ 0.608783] usbcore: registered new device driver usb [ 0.610210] pps_core: LinuxPPS API ver. 1 registered [ 0.611266] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti