CentOS System Rescue on AWS

Once upon a ‘right-now’ time, an EC2 instance on AWS would not come back online after a graceful reboot command.

The log extract:

Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.10.0-957.12.2.el7.x86_64 #1
Hardware name: Xen HVM domU, BIOS 4.2.amazon 08/24/2006

For unknown reasons, no amount of restarts or stop-and-waits would bring this machine back alive. One then had to resort to the system rescue procedure as follows:

Create a new instance using a similar AMI > take a snapshot of old volume from old instance > detach the volume from old instance > attach old volume to new machine at /dev/sda2 > ssh into new instance by following this procedure > then follow these next steps

# Check existing mount points

[[email protected] ~]$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
xvda 202:0 0 30G 0 disk
└─xvda1 202:1 0 30G 0 part
xvdb 202:16 0 30G 0 disk
└─xvdb1 202:17 0 30G 0 part /

From the information above, it appears that /dev/sda2 has been recognized by AWS as xvdb1 and subsequently mounted at root or /. In closer inspection, it appears that the system has come back online with it former installed apps and data. The next question is whether /dev/sda1 or xvda1 could be removed without adverse effect to the system. Once multiple backup copies of this instance has been done and there’s extra time to do another maintenance, this question would be answered.

For those who may Google similar error codes, this long log should pull those who has freshly experienced this ‘wata heck’ issue:

00000] xsave: enabled xstate_bv 0x7, cntxt size 0x340 using standard form
[ 0.000000] Memory: 1010204k/1048576k available (7668k kernel code, 396k absent, 37976k reserved, 6052k data, 1876k init)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=15, Nodes=1
[ 0.000000] x86/pti: Unmapping kernel while in userspace
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] RCU restricting CPUs from NR_CPUS=5120 to nr_cpu_ids=15.
[ 0.000000] NR_IRQS:327936 nr_irqs:952 0
[ 0.000000] xen:events: Xen HVM callback vector for event delivery is enabled
[ 0.000000] Console: colour VGA+ 80x25
[ 0.000000] console [tty0] enabled
[ 0.000000] Cannot get hvm parameter CONSOLE_EVTCHN (18): -22!
[ 0.000000] console [ttyS0] enabled
[ 0.000000] allocated 4194304 bytes of page_cgroup
[ 0.000000] please try 'cgroup_disable=memory' option if you don't want memory cgroups
[ 0.000000] tsc: Fast TSC calibration using PIT
[ 0.000000] tsc: Detected 2399.949 MHz processor
[ 0.000000] tsc: Detected 2400.042 MHz TSC
[ 0.027000] Calibrating delay loop (skipped), value calculated using timer frequency.. 4800.08 BogoMIPS (lpj=2400042)
[ 0.037004] pid_max: default: 32768 minimum: 301
[ 0.041044] Security Framework initialized
[ 0.045009] SELinux: Initializing.
[ 0.048026] Yama: becoming mindful.
[ 0.051113] Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
[ 0.057180] Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
[ 0.062083] Mount-cache hash table entries: 2048 (order: 2, 16384 bytes)
[ 0.067010] Mountpoint-cache hash table entries: 2048 (order: 2, 16384 bytes)
[ 0.073178] Initializing cgroup subsys memory
[ 0.077010] Initializing cgroup subsys devices
[ 0.080005] Initializing cgroup subsys freezer
[ 0.084003] Initializing cgroup subsys net_cls
[ 0.088004] Initializing cgroup subsys blkio
[ 0.092003] Initializing cgroup subsys perf_event
[ 0.096008] Initializing cgroup subsys hugetlb
[ 0.100004] Initializing cgroup subsys pids
[ 0.103004] Initializing cgroup subsys net_prio
[ 0.108392] mce: CPU supports 2 MCE banks
[ 0.112032] Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0
[ 0.116004] Last level dTLB entries: 4KB 64, 2MB 0, 4MB 0
[ 0.121002] tlb_flushall_shift: 6
[ 0.124007] Speculative Store Bypass: Vulnerable
[ 0.128004] FEATURE SPEC_CTRL Not Present
[ 0.132002] FEATURE IBPB_SUPPORT Not Present
[ 0.136200] Spectre V2 : Vulnerable: Retpoline without IBPB
[ 0.141043] MDS: Vulnerable: Clear CPU buffers attempted, no microcode
[ 0.167975] ACPI: Core revision 20130517
[ 0.175565] ACPI: All ACPI Tables successfully acquired
[ 0.180004] ftrace: allocating 29205 entries in 115 pages
[ 0.227255] IRQ remapping doesn't support X2APIC mode, disable x2apic.
[ 0.233005] Switched APIC routing to physical flat.
[ 0.240401] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=0 pin2=0
[ 0.255304] smpboot: CPU0: [ 0.256002] random: fast init done

[ 0.260002] Intel(R) Xeon(R) CPU E5-2676 v3 @ 2.40GHz (fam: 06, model: 3f, stepping: 02)
[ 0.269019] installing Xen timer for CPU 0
[ 0.273108] cpu 0 spinlock event irq 53
[ 0.274016] Performance Events: unsupported p6 CPU model 63 no PMU driver, software events only.
[ 0.278243] Brought up 1 CPUs
[ 0.279007] smpboot: Max logical packages: 15
[ 0.280009] smpboot: Total of 1 processors activated (4800.08 BogoMIPS)
[ 0.281409] NMI watchdog: disabled (cpu0): hardware events not enabled
[ 0.282007] NMI watchdog: Shutting down hard lockup detector on all cpus
[ 0.283261] devtmpfs: initialized
[ 0.285626] EVM: security.selinux
[ 0.286022] EVM: security.ima
[ 0.287020] EVM: security.capability
[ 0.289182] atomic64 test passed for x86-64 platform with CX8 and with SSE
[ 0.290021] pinctrl core: initialized pinctrl subsystem
[ 0.291061] RTC time: 4:33:58, date: 06/10/19
[ 0.292107] NET: Registered protocol family 16
[ 0.293151] ACPI: bus type PCI registered
[ 0.294007] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
[ 0.295357] PCI: Using configuration type 1 for base access
[ 0.297134] ACPI: Added _OSI(Module Device)
[ 0.298006] ACPI: Added _OSI(Processor Device)
[ 0.299007] ACPI: Added _OSI(3.0 _SCP Extensions)
[ 0.300005] ACPI: Added _OSI(Processor Aggregator Device)
[ 0.301023] ACPI: Added _OSI(Linux-Dell-Video)
[ 0.306282] ACPI: Interpreter enabled
[ 0.307017] ACPI: (supports S0 S3 S4 S5)
[ 0.308004] ACPI: Using IOAPIC for interrupt routing
[ 0.309039] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[ 0.310225] ACPI: Enabled 2 GPEs in block 00 to 0F
[ 0.375933] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[ 0.376013] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI]
[ 0.377016] acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM
[ 0.378016] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.
[ 0.379970] acpiphp: Slot [0] registered
[ 0.380983] acpiphp: Slot [3] registered
[ 0.381375] acpiphp: Slot [4] registered
[ 0.382441] acpiphp: Slot [5] registered
[ 0.383406] acpiphp: Slot [6] registered
[ 0.384396] acpiphp: Slot [7] registered
[ 0.385439] acpiphp: Slot [8] registered
[ 0.386425] acpiphp: Slot [9] registered
[ 0.387408] acpiphp: Slot [10] registered
[ 0.388407] acpiphp: Slot [11] registered
[ 0.389425] acpiphp: Slot [12] registered
[ 0.390410] acpiphp: Slot [13] registered
[ 0.391392] acpiphp: Slot [14] registered
[ 0.392404] acpiphp: Slot [15] registered
[ 0.393389] acpiphp: Slot [16] registered
[ 0.394435] acpiphp: Slot [17] registered
[ 0.395494] acpiphp: Slot [18] registered
[ 0.396422] acpiphp: Slot [19] registered
[ 0.397482] acpiphp: Slot [20] registered
[ 0.398482] acpiphp: Slot [21] registered
[ 0.399408] acpiphp: Slot [22] registered
[ 0.400502] acpiphp: Slot [23] registered
[ 0.401407] acpiphp: Slot [24] registered
[ 0.402484] acpiphp: Slot [25] registered
[ 0.403397] acpiphp: Slot [26] registered
[ 0.404441] acpiphp: Slot [27] registered
[ 0.405432] acpiphp: Slot [28] registered
[ 0.406526] acpiphp: Slot [29] registered
[ 0.407399] acpiphp: Slot [30] registered
[ 0.408380] acpiphp: Slot [31] registered
[ 0.409312] PCI host bridge to bus 0000:00
[ 0.410010] pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7 window]
[ 0.411010] pci_bus 0000:00: root bus resource [io 0x0d00-0xffff window]
[ 0.412011] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
[ 0.413017] pci_bus 0000:00: root bus resource [mem 0xf0000000-0xfbffffff window]
[ 0.414011] pci_bus 0000:00: root bus resource [bus 00-ff]
[ 0.421917] pci 0000:00:01.1: legacy IDE quirk: reg 0x10: [io 0x01f0-0x01f7]
[ 0.422009] pci 0000:00:01.1: legacy IDE quirk: reg 0x14: [io 0x03f6]
[ 0.423006] pci 0000:00:01.1: legacy IDE quirk: reg 0x18: [io 0x0170-0x0177]
[ 0.424009] pci 0000:00:01.1: legacy IDE quirk: reg 0x1c: [io 0x0376]
[ 0.426000] * Found PM-Timer Bug on the chipset. Due to workarounds for a bug,
[ 0.426000] * this clock source is slow. Consider trying other clock sources
[ 0.427404] pci 0000:00:01.3: quirk: [io 0xb000-0xb03f] claimed by PIIX4 ACPI
[ 0.434937] ACPI: PCI Interrupt Link [LNKA] (IRQs *5 10 11)
[ 0.438216] ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
[ 0.442215] ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
[ 0.446221] ACPI: PCI Interrupt Link [LNKD] (IRQs *5 10 11)
[ 0.469286] xen:balloon: Initialising balloon driver
[ 0.473175] vgaarb: device added: PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none
[ 0.474007] vgaarb: loaded
[ 0.475006] vgaarb: bridge control possible 0000:00:02.0
[ 0.476114] SCSI subsystem initialized
[ 0.477037] ACPI: bus type USB registered
[ 0.478031] usbcore: registered new interface driver usbfs
[ 0.479020] usbcore: registered new interface driver hub
[ 0.480045] usbcore: registered new device driver usb
[ 0.481114] EDAC MC: Ver: 3.0.0
[ 0.482546] PCI: Using ACPI for IRQ routing
[ 0.483643] NetLabel: Initializing
[ 0.484007] NetLabel: domain hash size = 128
[ 0.485006] NetLabel: protocols = UNLABELED CIPSOv4
[ 0.486026] NetLabel: unlabeled traffic allowed by default
[ 0.487127] HPET: 3 timers in total, 0 timers will be used for per-cpu timer
[ 0.488022] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0
[ 0.491005] hpet0: 3 comparators, 64-bit 62.500000 MHz counter
[ 0.494005] amd_nb: Cannot enumerate AMD northbridges
[ 0.495025] Switched to clocksource xen
[ 0.502987] pnp: PnP ACPI init
[ 0.506078] ACPI: bus type PNP registered
[ 0.509742] system 00:00: [mem 0x00000000-0x0009ffff] could not be reserved
[ 0.515082] system 00:01: [io 0x08a0-0x08a3] has been reserved
[ 0.519785] system 00:01: [io 0x0cc0-0x0ccf] has been reserved
[ 0.552008] system 00:01: [io 0x04d0-0x04d1] has been reserved
[ 0.558029] system 00:07: [io 0x10c0-0x1141] has been reserved
[ 0.564061] system 00:07: [io 0xb044-0xb047] has been reserved
[ 0.590508] pnp: PnP ACPI: found 8 devices
[ 0.594853] ACPI: bus type PNP unregistered
[ 0.605064] NET: Registered protocol family 2
[ 0.610508] TCP established hash table entries: 8192 (order: 4, 65536 bytes)
[ 0.617676] TCP bind hash table entries: 8192 (order: 5, 131072 bytes)
[ 0.624275] TCP: Hash tables configured (established 8192 bind 8192)
[ 0.630061] TCP: reno registered
[ 0.633681] UDP hash table entries: 512 (order: 2, 16384 bytes)
[ 0.639266] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
[ 0.645364] NET: Registered protocol family 1
[ 0.649826] pci 0000:00:00.0: Limiting direct PCI/PCI transfers
[ 0.655835] pci 0000:00:01.0: PIIX3: Enabling Passive Release
[ 0.661358] pci 0000:00:01.0: Activating ISA DMA hang workarounds
[ 0.667681] RAPL PMU: API unit is 2^-32 Joules, 3 fixed counters, 655360 ms ovfl timer
[ 0.676002] RAPL PMU: hw unit of domain pp0-core 2^-14 Joules
[ 0.682016] RAPL PMU: hw unit of domain package 2^-14 Joules
[ 0.687371] RAPL PMU: hw unit of domain dram 2^-16 Joules
[ 0.692910] sha1_ssse3: Using AVX2 optimized SHA-1 implementation
[ 0.699536] sha256_ssse3: Using AVX2 optimized SHA-256 implementation
[ 0.705996] futex hash table entries: 4096 (order: 6, 262144 bytes)
[ 0.712010] Initialise system trusted keyring
[ 0.716803] audit: initializing netlink socket (disabled)
[ 0.722344] type=2000 audit(1560141239.309:1): initialized
[ 0.750474] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[ 0.757885] zpool: loaded
[ 0.761566] zbud: loaded
[ 0.765013] VFS: Disk quotas dquot_6.5.2
[ 0.769394] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ 0.776247] msgmni has been set to 1973
[ 0.780822] Key type big_key registered
[ 0.785563] NET: Registered protocol family 38
[ 0.790088] Key type asymmetric registered
[ 0.794607] Asymmetric key parser 'x509' registered
[ 0.799566] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 248)
[ 0.807409] io scheduler noop registered
[ 0.811807] io scheduler deadline registered (default)
[ 0.816942] io scheduler cfq registered
[ 0.821341] io scheduler mq-deadline registered
[ 0.826006] io scheduler kyber registered
[ 0.830426] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[ 0.836212] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
[ 0.842340] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
[ 0.848988] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[ 0.857067] ACPI: Power Button [PWRF]
[ 0.861291] input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
[ 0.869235] ACPI: Sleep Button [SLPF]
[ 0.873456] GHES: HEST is not enabled!
[ 0.878087] xen:grant_table: Grant tables using version 1 layout
[ 0.884113] Grant table initialized
[ 0.888241] Cannot get hvm parameter CONSOLE_EVTCHN (18): -22!
[ 0.893926] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 0.930588] 00:06: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[ 0.936943] Non-volatile memory driver v1.3
[ 0.948834] Linux agpgart interface v0.103
[ 0.960345] crash memory driver: version 1.1
[ 0.969370] rdac: device handler registered
[ 0.975423] hp_sw: device handler registered
[ 0.980601] emc: device handler registered
[ 0.986644] alua: device handler registered
[ 0.992717] libphy: Fixed MDIO Bus: probed
[ 0.997576] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.006334] ehci-pci: EHCI PCI platform driver
[ 1.011223] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 1.016876] ohci-pci: OHCI PCI platform driver
[ 1.021863] uhci_hcd: USB Universal Host Controller Interface driver
[ 1.027672] usbcore: registered new interface driver usbserial_generic
[ 1.033734] usbserial: USB Serial support registered for generic
[ 1.039340] i8042: PNP: PS/2 Controller [PNP0303:PS2K,PNP0f13:PS2M] at 0x60,0x64 irq 1,12
[ 1.050083] serio: i8042 KBD port at 0x60,0x64 irq 1
[ 1.055390] serio: i8042 AUX port at 0x60,0x64 irq 12
[ 1.060500] mousedev: PS/2 mouse device common for all mice
[ 1.067280] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input2
[ 1.076381] rtc_cmos 00:02: rtc core: registered rtc_cmos as rtc0
[ 1.082440] rtc_cmos 00:02: alarms up to one day, 114 bytes nvram, hpet irqs
[ 1.096955] cpuidle: using governor menu
[ 1.101932] hidraw: raw HID events driver (C) Jiri Kosina
[ 1.107172] usbcore: registered new interface driver usbhid
[ 1.112756] usbhid: USB HID core driver
[ 1.117121] drop_monitor: Initializing network drop monitor service
[ 1.123313] TCP: cubic registered
[ 1.126969] Initializing XFRM netlink socket
[ 1.131609] NET: Registered protocol family 10
[ 1.136708] NET: Registered protocol family 17
[ 1.142103] mpls_gso: MPLS GSO support
[ 1.146241] intel_rdt: Intel RDT L3 allocation detected
[ 1.151575] Loading compiled-in X.509 certificates
[ 1.156559] Loaded X.509 cert 'CentOS Linux kpatch signing key: ea0413152cde1d98ebdca3fe6f0230904c9ef717'
[ 1.166089] Loaded X.509 cert 'CentOS Linux Driver update signing key: 7f421ee0ab69461574bb358861dbe77762a4201b'
[ 1.176342] Loaded X.509 cert 'CentOS Linux kernel signing key: 8de64fb5969b557edc7f032eeabcbe4f37177f4e'
[ 1.185515] registered taskstats version 1
[ 1.190244] Key type trusted registered
[ 1.194509] Key type encrypted registered
[ 1.199096] IMA: No TPM chip found, activating TPM-bypass! (rc=-19)
[ 1.205332] xenbus_probe_frontend: Device with no driver: device/vbd/768
[ 1.211651] xenbus_probe_frontend: Device with no driver: device/vif/0
[ 1.217661] Magic number: 7:202:565
[ 1.221760] rtc_cmos 00:02: setting system clock to 2019-06-10 04:34:00 UTC (1560141240)
[ 1.694136] tsc: Refined TSC clocksource calibration: 2399.999 MHz
[ 1.938315] input: ImExPS/2 Generic Explorer Mouse as /devices/platform/i8042/serio1/input/input3
[ 1.946652] md: Waiting for all devices to be available before autodetect
[ 1.955696] md: If you don't use raid, use raid=noautodetect
[ 1.962645] md: Autodetecting RAID arrays.
[ 1.968336] md: autorun ...
[ 1.972543] md: ... autorun DONE.
[ 1.977339] List of all partitions:
[ 1.982221] No filesystem could mount root, tried: 
[ 1.989166] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 1.990142] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.10.0-957.12.2.el7.x86_64 #1
[ 1.990142] Hardware name: Xen HVM domU, BIOS 4.2.amazon 08/24/2006
[ 1.990142] Call Trace:
[ 1.990142] [<ffffffffbb963041>] dump_stack+0x19/0x1b
[ 1.990142] [<ffffffffbb95c750>] panic+0xe8/0x21f
[ 1.990142] [<ffffffffbbf86761>] mount_block_root+0x291/0x2a0
[ 1.990142] [<ffffffffbbf867c3>] mount_root+0x53/0x56
[ 1.990142] [<ffffffffbbf86902>] prepare_namespace+0x13c/0x174
[ 1.990142] [<ffffffffbbf863df>] kernel_init_freeable+0x1f8/0x21f
[ 1.990142] [<ffffffffbbf85b1f>] ? initcall_blacklist+0xb0/0xb0
[ 1.990142] [<ffffffffbb951120>] ? rest_init+0x80/0x80
[ 1.990142] [<ffffffffbb95112e>] kernel_init+0xe/0x100
[ 1.990142] [<ffffffffbb975c37>] ret_from_fork_nospec_begin+0x21/0x21
[ 1.990142] [<ffffffffbb951120>] ? rest_init+0x80/0x80
 The selected entry will be started automatically in 1s.  The selected entry will be started automatically in 0s. [?25h[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Initializing cgroup subsys cpuacct
[ 0.000000] Linux version 3.10.0-957.12.2.el7.x86_64 ([email protected]) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC) ) #1 SMP Tue May 14 21:24:32 UTC 2019
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.10.0-957.12.2.el7.x86_64 root=UUID=8c1540fa-e2b4-407d-bcd1-59848a73e463 ro console=tty0 console=ttyS0,115200n8 crashkernel=auto console=ttyS0,115200 LANG=en_US.UTF-8
[ 0.000000] e820: BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009dfff] usable
[ 0.000000] BIOS-e820: [mem 0x000000000009e000-0x000000000009ffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000003fffffff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000fc000000-0x00000000ffffffff] reserved
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] SMBIOS 2.7 present.
[ 0.000000] DMI: Xen HVM domU, BIOS 4.2.amazon 08/24/2006
[ 0.000000] Hypervisor detected: Xen HVM
[ 0.000000] Xen version 4.2.
[ 0.000000] Netfront and the Xen platform PCI driver have been compiled for this kernel: unplug emulated NICs.
[ 0.000000] Blkfront and the Xen platform PCI driver have been compiled for this kernel: unplug emulated disks.
[ 0.000000] You might have to change the root device
[ 0.000000] from /dev/hd[a-d] to /dev/xvd[a-d]
[ 0.000000] in your root= kernel command line option
[ 0.000000] e820: last_pfn = 0x40000 max_arch_pfn = 0x400000000
[ 0.000000] PAT configuration [0-7]: WB WC UC- UC WB WP UC- UC 
[ 0.000000] found SMP MP-table at [mem 0x000fbc50-0x000fbc5f] mapped at [ffffffffff200c50]
[ 0.000000] Early table checksum verification disabled
[ 0.000000] ACPI: RSDP 00000000000ea020 00024 (v02 Xen)
[ 0.000000] ACPI: XSDT 00000000fc00e2a0 00054 (v01 Xen HVM 00000000 HVML 00000000)
[ 0.000000] ACPI: FACP 00000000fc00df60 000F4 (v04 Xen HVM 00000000 HVML 00000000)
[ 0.000000] ACPI: DSDT 00000000fc0021c0 0BD19 (v02 Xen HVM 00000000 INTL 20090123)
[ 0.000000] ACPI: FACS 00000000fc002180 00040
[ 0.000000] ACPI: APIC 00000000fc00e060 000D8 (v02 Xen HVM 00000000 HVML 00000000)
[ 0.000000] ACPI: HPET 00000000fc00e1b0 00038 (v01 Xen HVM 00000000 HVML 00000000)
[ 0.000000] ACPI: WAET 00000000fc00e1f0 00028 (v01 Xen HVM 00000000 HVML 00000000)
[ 0.000000] ACPI: SSDT 00000000fc00e220 00031 (v02 Xen HVM 00000000 INTL 20090123)
[ 0.000000] ACPI: SSDT 00000000fc00e260 00033 (v02 Xen HVM 00000000 INTL 20090123)
[ 0.000000] No NUMA configuration found
[ 0.000000] Faking a node at [mem 0x0000000000000000-0x000000003fffffff]
[ 0.000000] NODE_DATA(0) allocated [mem 0x3ffd9000-0x3fffffff]
[ 0.000000] crashkernel=auto resulted in zero bytes of reserved memory.
[ 0.000000] Zone ranges:
[ 0.000000] DMA [mem 0x00001000-0x00ffffff]
[ 0.000000] DMA32 [mem 0x01000000-0xffffffff]
[ 0.000000] Normal empty
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x00001000-0x0009dfff]
[ 0.000000] node 0: [mem 0x00100000-0x3fffffff]
[ 0.000000] Initmem setup node 0 [mem 0x00001000-0x3fffffff]
[ 0.000000] ACPI: PM-Timer IO Port: 0xb008
[ 0.000000] ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x03] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x04] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x05] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x06] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x07] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x08] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x09] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x0a] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x0b] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x0c] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x0d] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x0e] lapic_id[0x00] disabled)
[ 0.000000] ACPI: IOAPIC (id[0x01] address[0xfec00000] gsi_base[0])
[ 0.000000] IOAPIC[0]: apic_id 1, version 17, address 0xfec00000, GSI 0-47
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 low level)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 low level)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 low level)
[ 0.000000] Using ACPI (MADT) for SMP configuration information
[ 0.000000] ACPI: HPET id: 0x8086a201 base: 0xfed00000
[ 0.000000] smpboot: Allowing 15 CPUs, 14 hotplug CPUs
[ 0.000000] PM: Registered nosave memory: [mem 0x0009e000-0x0009ffff]
[ 0.000000] PM: Registered nosave memory: [mem 0x000a0000-0x000dffff]
[ 0.000000] PM: Registered nosave memory: [mem 0x000e0000-0x000fffff]
[ 0.000000] e820: [mem 0x40000000-0xfbffffff] available for PCI devices
[ 0.000000] Booting paravirtualized kernel on Xen HVM
[ 0.000000] setup_percpu: NR_CPUS:5120 nr_cpumask_bits:15 nr_cpu_ids:15 nr_node_ids:1
[ 0.000000] PERCPU: Embedded 38 pages/cpu @ffff9b973e200000 s118784 r8192 d28672 u262144
[ 0.000000] PV qspinlock hash table entries: 256 (order: 0, 4096 bytes)
[ 0.000000] Built 1 zonelists in Node order, mobility grouping on. Total pages: 257928
[ 0.000000] Policy zone: DMA32
[ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.10.0-957.12.2.el7.x86_64 root=UUID=8c1540fa-e2b4-407d-bcd1-59848a73e463 ro console=tty0 console=ttyS0,115200n8 crashkernel=auto console=ttyS0,115200 LANG=en_US.UTF-8
[ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[ 0.000000] x86/fpu: xstate_offset[2]: 0240, xstate_sizes[2]: 0100
[ 0.000000] xsave: enabled xstate_bv 0x7, cntxt size 0x340 using standard form
[ 0.000000] Memory: 1010204k/1048576k available (7668k kernel code, 396k absent, 37976k reserved, 6052k data, 1876k init)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=15, Nodes=1
[ 0.000000] x86/pti: Unmapping kernel while in userspace
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] RCU restricting CPUs from NR_CPUS=5120 to nr_cpu_ids=15.
[ 0.000000] NR_IRQS:327936 nr_irqs:952 0
[ 0.000000] xen:events: Xen HVM callback vector for event delivery is enabled
[ 0.000000] Console: colour VGA+ 80x25
[ 0.000000] console [tty0] enabled
[ 0.000000] Cannot get hvm parameter CONSOLE_EVTCHN (18): -22!
[ 0.000000] console [ttyS0] enabled
[ 0.000000] allocated 4194304 bytes of page_cgroup
[ 0.000000] please try 'cgroup_disable=memory' option if you don't want memory cgroups
[ 0.000000] tsc: Fast TSC calibration using PIT
[ 0.000000] tsc: Detected 2399.945 MHz processor
[ 0.000000] tsc: Detected 2400.042 MHz TSC
[ 0.029000] Calibrating delay loop (skipped), value calculated using timer frequency.. 4800.08 BogoMIPS (lpj=2400042)
[ 0.042004] pid_max: default: 32768 minimum: 301
[ 0.048045] Security Framework initialized
[ 0.053009] SELinux: Initializing.
[ 0.058026] Yama: becoming mindful.
[ 0.064024] Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
[ 0.074176] Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
[ 0.089094] Mount-cache hash table entries: 2048 (order: 2, 16384 bytes)
[ 0.099010] Mountpoint-cache hash table entries: 2048 (order: 2, 16384 bytes)
[ 0.109183] Initializing cgroup subsys memory
[ 0.115009] Initializing cgroup subsys devices
[ 0.121004] Initializing cgroup subsys freezer
[ 0.128006] Initializing cgroup subsys net_cls
[ 0.138008] Initializing cgroup subsys blkio
[ 0.147005] Initializing cgroup subsys perf_event
[ 0.155009] Initializing cgroup subsys hugetlb
[ 0.160003] Initializing cgroup subsys pids
[ 0.167005] Initializing cgroup subsys net_prio
[ 0.174830] mce: CPU supports 2 MCE banks
[ 0.180034] Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0
[ 0.187004] Last level dTLB entries: 4KB 64, 2MB 0, 4MB 0
[ 0.195003] tlb_flushall_shift: 6
[ 0.200006] Speculative Store Bypass: Vulnerable
[ 0.209004] FEATURE SPEC_CTRL Not Present
[ 0.214003] FEATURE IBPB_SUPPORT Not Present
[ 0.218207] Spectre V2 : Vulnerable: Retpoline without IBPB
[ 0.224036] MDS: Vulnerable: Clear CPU buffers attempted, no microcode
[ 0.255879] ACPI: Core revision 20130517
[ 0.256003] random: fast init done
[ 0.267362] ACPI: All ACPI Tables successfully acquired
[ 0.275005] ftrace: allocating 29205 entries in 115 pages
[ 0.321797] IRQ remapping doesn't support X2APIC mode, disable x2apic.
[ 0.330003] Switched APIC routing to physical flat.
[ 0.338408] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=0 pin2=0
[ 0.355740] smpboot: CPU0: Intel(R) Xeon(R) CPU E5-2676 v3 @ 2.40GHz (fam: 06, model: 3f, stepping: 02)
[ 0.372019] installing Xen timer for CPU 0
[ 0.385105] cpu 0 spinlock event irq 53
[ 0.386020] Performance Events: unsupported p6 CPU model 63 no PMU driver, software events only.
[ 0.390252] Brought up 1 CPUs
[ 0.391008] smpboot: Max logical packages: 15
[ 0.392009] smpboot: Total of 1 processors activated (4800.08 BogoMIPS)
[ 0.393409] NMI watchdog: disabled (cpu0): hardware events not enabled
[ 0.394006] NMI watchdog: Shutting down hard lockup detector on all cpus
[ 0.395258] devtmpfs: initialized
[ 0.397608] EVM: security.selinux
[ 0.398025] EVM: security.ima
[ 0.399024] EVM: security.capability
[ 0.401167] atomic64 test passed for x86-64 platform with CX8 and with SSE
[ 0.402030] pinctrl core: initialized pinctrl subsystem
[ 0.403071] RTC time: 4:34:30, date: 06/10/19
[ 0.404126] NET: Registered protocol family 16
[ 0.405172] ACPI: bus type PCI registered
[ 0.406008] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
[ 0.407349] PCI: Using configuration type 1 for base access
[ 0.409142] ACPI: Added _OSI(Module Device)
[ 0.410007] ACPI: Added _OSI(Processor Device)
[ 0.411006] ACPI: Added _OSI(3.0 _SCP Extensions)
[ 0.412009] ACPI: Added _OSI(Processor Aggregator Device)
[ 0.413026] ACPI: Added _OSI(Linux-Dell-Video)
[ 0.418313] ACPI: Interpreter enabled
[ 0.419024] ACPI: (supports S0 S3 S4 S5)
[ 0.420007] ACPI: Using IOAPIC for interrupt routing
[ 0.421059] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[ 0.422311] ACPI: Enabled 2 GPEs in block 00 to 0F
[ 0.500117] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[ 0.501015] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI]
[ 0.502017] acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM
[ 0.503019] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.
[ 0.505000] acpiphp: Slot [0] registered
[ 0.505996] acpiphp: Slot [3] registered
[ 0.506420] acpiphp: Slot [4] registered
[ 0.507412] acpiphp: Slot [5] registered
[ 0.508401] acpiphp: Slot [6] registered
[ 0.509529] acpiphp: Slot [7] registered
[ 0.510581] acpiphp: Slot [8] registered
[ 0.511670] acpiphp: Slot [9] registered
[ 0.512819] acpiphp: Slot [10] registered
[ 0.513859] acpiphp: Slot [11] registered
[ 0.514820] acpiphp: Slot [12] registered
[ 0.515606] acpiphp: Slot [13] registered
[ 0.516586] acpiphp: Slot [14] registered
[ 0.517595] acpiphp: Slot [15] registered
[ 0.518550] acpiphp: Slot [16] registered
[ 0.519719] acpiphp: Slot [17] registered
[ 0.520590] acpiphp: Slot [18] registered
[ 0.521746] acpiphp: Slot [19] registered
[ 0.522525] acpiphp: Slot [20] registered
[ 0.523668] acpiphp: Slot [21] registered
[ 0.524614] acpiphp: Slot [22] registered
[ 0.525739] acpiphp: Slot [23] registered
[ 0.526682] acpiphp: Slot [24] registered
[ 0.527661] acpiphp: Slot [25] registered
[ 0.528686] acpiphp: Slot [26] registered
[ 0.529671] acpiphp: Slot [27] registered
[ 0.530574] acpiphp: Slot [28] registered
[ 0.531541] acpiphp: Slot [29] registered
[ 0.532523] acpiphp: Slot [30] registered
[ 0.533612] acpiphp: Slot [31] registered
[ 0.534436] PCI host bridge to bus 0000:00
[ 0.535009] pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7 window]
[ 0.536009] pci_bus 0000:00: root bus resource [io 0x0d00-0xffff window]
[ 0.537009] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
[ 0.538009] pci_bus 0000:00: root bus resource [mem 0xf0000000-0xfbffffff window]
[ 0.539009] pci_bus 0000:00: root bus resource [bus 00-ff]
[ 0.549589] pci 0000:00:01.1: legacy IDE quirk: reg 0x10: [io 0x01f0-0x01f7]
[ 0.550011] pci 0000:00:01.1: legacy IDE quirk: reg 0x14: [io 0x03f6]
[ 0.551006] pci 0000:00:01.1: legacy IDE quirk: reg 0x18: [io 0x0170-0x0177]
[ 0.552008] pci 0000:00:01.1: legacy IDE quirk: reg 0x1c: [io 0x0376]
[ 0.554000] * Found PM-Timer Bug on the chipset. Due to workarounds for a bug,
[ 0.554000] * this clock source is slow. Consider trying other clock sources
[ 0.555687] pci 0000:00:01.3: quirk: [io 0xb000-0xb03f] claimed by PIIX4 ACPI
[ 0.564018] ACPI: PCI Interrupt Link [LNKA] (IRQs *5 10 11)
[ 0.568254] ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
[ 0.572254] ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
[ 0.576269] ACPI: PCI Interrupt Link [LNKD] (IRQs *5 10 11)
[ 0.600166] xen:balloon: Initialising balloon driver
[ 0.603197] vgaarb: device added: PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none
[ 0.604009] vgaarb: loaded
[ 0.605005] vgaarb: bridge control possible 0000:00:02.0
[ 0.606147] SCSI subsystem initialized
[ 0.607048] ACPI: bus type USB registered
[ 0.608034] usbcore: registered new interface driver usbfs
[ 0.609020] usbcore: registered new interface driver hub
[ 0.610038] usbcore: registered new device driver usb
[ 0.611104] EDAC MC: Ver: 3.0.0
[ 0.612771] PCI: Using ACPI for IRQ routing
[ 0.613725] NetLabel: Initializing
[ 0.614007] NetLabel: domain hash size = 128
[ 0.615004] NetLabel: protocols = UNLABELED CIPSOv4
[ 0.616028] NetLabel: unlabeled traffic allowed by default
[ 0.617128] HPET: 3 timers in total, 0 timers will be used for per-cpu timer
[ 0.618023] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0
[ 0.621006] hpet0: 3 comparators, 64-bit 62.500000 MHz counter
[ 0.623040] amd_nb: Cannot enumerate AMD northbridges
[ 0.624032] Switched to clocksource xen
[ 0.635443] pnp: PnP ACPI init
[ 0.640127] ACPI: bus type PNP registered
[ 0.645489] system 00:00: [mem 0x00000000-0x0009ffff] could not be reserved
[ 0.657117] system 00:01: [io 0x08a0-0x08a3] has been reserved
[ 0.664097] system 00:01: [io 0x0cc0-0x0ccf] has been reserved
[ 0.670816] system 00:01: [io 0x04d0-0x04d1] has been reserved
[ 0.677854] system 00:07: [io 0x10c0-0x1141] has been reserved
[ 0.684693] system 00:07: [io 0xb044-0xb047] has been reserved
[ 0.718409] pnp: PnP ACPI: found 8 devices
[ 0.723652] ACPI: bus type PNP unregistered
[ 0.735102] NET: Registered protocol family 2
[ 0.740522] TCP established hash table entries: 8192 (order: 4, 65536 bytes)
[ 0.748299] TCP bind hash table entries: 8192 (order: 5, 131072 bytes)
[ 0.755613] TCP: Hash tables configured (established 8192 bind 8192)
[ 0.763079] TCP: reno registered
[ 0.767508] UDP hash table entries: 512 (order: 2, 16384 bytes)
[ 0.774388] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
[ 0.781543] NET: Registered protocol family 1
[ 0.787843] pci 0000:00:00.0: Limiting direct PCI/PCI transfers
[ 0.794133] pci 0000:00:01.0: PIIX3: Enabling Passive Release
[ 0.798944] pci 0000:00:01.0: Activating ISA DMA hang workarounds
[ 0.804152] RAPL PMU: API unit is 2^-32 Joules, 3 fixed counters, 655360 ms ovfl timer
[ 0.810869] RAPL PMU: hw unit of domain pp0-core 2^-14 Joules
[ 0.815374] RAPL PMU: hw unit of domain package 2^-14 Joules
[ 0.819901] RAPL PMU: hw unit of domain dram 2^-16 Joules
[ 0.824614] sha1_ssse3: Using AVX2 optimized SHA-1 implementation
[ 0.829491] sha256_ssse3: Using AVX2 optimized SHA-256 implementation
[ 0.835580] futex hash table entries: 4096 (order: 6, 262144 bytes)
[ 0.843657] Initialise system trusted keyring
[ 0.848225] audit: initializing netlink socket (disabled)
[ 0.863582] type=2000 audit(1560141271.130:1): initialized
[ 0.893529] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[ 0.900879] zpool: loaded
[ 0.904208] zbud: loaded
[ 0.907827] VFS: Disk quotas dquot_6.5.2
[ 0.912102] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ 0.918521] msgmni has been set to 1973
[ 0.922762] Key type big_key registered
[ 0.927526] NET: Registered protocol family 38
[ 0.932154] Key type asymmetric registered
[ 0.936379] Asymmetric key parser 'x509' registered
[ 0.941610] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 248)
[ 0.949172] io scheduler noop registered
[ 0.953630] io scheduler deadline registered (default)
[ 0.958779] io scheduler cfq registered
[ 0.962795] io scheduler mq-deadline registered
[ 0.967519] io scheduler kyber registered
[ 0.972004] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[ 0.978004] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
[ 0.984095] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
[ 0.990552] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[ 0.997993] ACPI: Power Button [PWRF]
[ 1.002041] input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
[ 1.009696] ACPI: Sleep Button [SLPF]
[ 1.013687] GHES: HEST is not enabled!
[ 1.018108] xen:grant_table: Grant tables using version 1 layout
[ 1.023794] Grant table initialized
[ 1.033549] Cannot get hvm parameter CONSOLE_EVTCHN (18): -22!
[ 1.039033] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 1.075270] 00:06: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[ 1.083029] Non-volatile memory driver v1.3
[ 1.087958] Linux agpgart interface v0.103
[ 1.092855] crash memory driver: version 1.1
[ 1.098479] rdac: device handler registered
[ 1.103629] hp_sw: device handler registered
[ 1.108584] emc: device handler registered
[ 1.113453] alua: device handler registered
[ 1.122580] libphy: Fixed MDIO Bus: probed
[ 1.126730] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.132779] ehci-pci: EHCI PCI platform driver
[ 1.137457] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 1.143210] ohci-pci: OHCI PCI platform driver
[ 1.147690] uhci_hcd: USB Universal Host Controller Interface driver
[ 1.153847] usbcore: registered new interface driver usbserial_generic
[ 1.161186] usbserial: USB Serial support registered for generic
[ 1.168310] i8042: PNP: PS/2 Controller [PNP0303:PS2K,PNP0f13:PS2M] at 0x60,0x64 irq 1,12
[ 1.180270] serio: i8042 KBD port at 0x60,0x64 irq 1
[ 1.186144] serio: i8042 AUX port at 0x60,0x64 irq 12
[ 1.192480] mousedev: PS/2 mouse device common for all mice
[ 1.208075] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input2
[ 1.216102] rtc_cmos 00:02: rtc core: registered rtc_cmos as rtc0
[ 1.221573] rtc_cmos 00:02: alarms up to one day, 114 bytes nvram, hpet irqs
[ 1.236197] cpuidle: using governor menu
[ 1.240688] hidraw: raw HID events driver (C) Jiri Kosina
[ 1.246083] usbcore: registered new interface driver usbhid
[ 1.251853] usbhid: USB HID core driver
[ 1.255991] drop_monitor: Initializing network drop monitor service
[ 1.261765] TCP: cubic registered
[ 1.265322] Initializing XFRM netlink socket
[ 1.269979] NET: Registered protocol family 10
[ 1.274704] NET: Registered protocol family 17
[ 1.279279] mpls_gso: MPLS GSO support
[ 1.284074] intel_rdt: Intel RDT L3 allocation detected
[ 1.289211] Loading compiled-in X.509 certificates
[ 1.294077] Loaded X.509 cert 'CentOS Linux kpatch signing key: ea0413152cde1d98ebdca3fe6f0230904c9ef717'
[ 1.303018] Loaded X.509 cert 'CentOS Linux Driver update signing key: 7f421ee0ab69461574bb358861dbe77762a4201b'
[ 1.312801] Loaded X.509 cert 'CentOS Linux kernel signing key: 8de64fb5969b557edc7f032eeabcbe4f37177f4e'
[ 1.321526] registered taskstats version 1
[ 1.325847] Key type trusted registered
[ 1.329839] Key type encrypted registered
[ 1.333922] IMA: No TPM chip found, activating TPM-bypass! (rc=-19)
[ 1.339920] xenbus_probe_frontend: Device with no driver: device/vbd/768
[ 1.345690] xenbus_probe_frontend: Device with no driver: device/vif/0
[ 1.351306] Magic number: 7:202:565
[ 1.355681] rtc_cmos 00:02: setting system clock to 2019-06-10 04:34:32 UTC (1560141272)
[ 1.826155] tsc: Refined TSC clocksource calibration: 2399.998 MHz
[ 2.083477] input: ImExPS/2 Generic Explorer Mouse as /devices/platform/i8042/serio1/input/input3
[ 2.098143] md: Waiting for all devices to be available before autodetect
[ 2.110354] md: If you don't use raid, use raid=noautodetect
[ 2.116879] md: Autodetecting RAID arrays.
[ 2.121422] md: autorun ...
[ 2.124985] md: ... autorun DONE.
[ 2.135110] List of all partitions:
[ 2.139306] No filesystem could mount root, tried: 
[ 2.147451] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 2.148428] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.10.0-957.12.2.el7.x86_64 #1
[ 2.148428] Hardware name: Xen HVM domU, BIOS 4.2.amazon 08/24/2006
[ 2.148428] Call Trace:
[ 2.148428] [<ffffffff88763041>] dump_stack+0x19/0x1b
[ 2.148428] [<ffffffff8875c750>] panic+0xe8/0x21f
[ 2.148428] [<ffffffff88d86761>] mount_block_root+0x291/0x2a0
[ 2.148428] [<ffffffff88d867c3>] mount_root+0x53/0x56
[ 2.148428] [<ffffffff88d86902>] prepare_namespace+0x13c/0x174
[ 2.148428] [<ffffffff88d863df>] kernel_init_freeable+0x1f8/0x21f
[ 2.148428] [<ffffffff88d85b1f>] ? initcall_blacklist+0xb0/0xb0
[ 2.148428] [<ffffffff88751120>] ? rest_init+0x80/0x80
[ 2.148428] [<ffffffff8875112e>] kernel_init+0xe/0x100
[ 2.148428] [<ffffffff88775c37>] ret_from_fork_nospec_begin+0x21/0x21
[ 2.148428] [<ffffffff88751120>] ? rest_init+0x80/0x80
[?25lUse the ^ and v keys to change the selection.

Press 'e' to edit the selected item, or 'c' for a command prompt.   CentOS Linux (3.10.0-957.12.2.el7.x86_64) 7 (Core)  CentOS Linux (3.10.0-957.5.1.el7.x86_64) 7 (Core)  CentOS Linux (3.10.0-957.1.3.el7.x86_64) 7 (Core)  CentOS Linux (3.10.0-862.3.2.el7.x86_64) 7 (Core)  CentOS Linux (0-rescue-b30d0f2110ac3807b210c19ede3ce88f) 7 (Core)             The selected entry will be started automatically in 1s.  The selected entry will be started automatically in 0s. [?25h[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Initializing cgroup subsys cpuacct
[ 0.000000] Linux version 3.10.0-957.12.2.el7.x86_64 ([email protected]) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC) ) #1 SMP Tue May 14 21:24:32 UTC 2019
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.10.0-957.12.2.el7.x86_64 root=UUID=8c1540fa-e2b4-407d-bcd1-59848a73e463 ro console=tty0 console=ttyS0,115200n8 crashkernel=auto console=ttyS0,115200 LANG=en_US.UTF-8
[ 0.000000] e820: BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009dfff] usable
[ 0.000000] BIOS-e820: [mem 0x000000000009e000-0x000000000009ffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000003fffffff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000fc000000-0x00000000ffffffff] reserved
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] SMBIOS 2.7 present.
[ 0.000000] DMI: Xen HVM domU, BIOS 4.2.amazon 08/24/2006
[ 0.000000] Hypervisor detected: Xen HVM
[ 0.000000] Xen version 4.2.
[ 0.000000] Netfront and the Xen platform PCI driver have been compiled for this kernel: unplug emulated NICs.
[ 0.000000] Blkfront and the Xen platform PCI driver have been compiled for this kernel: unplug emulated disks.
[ 0.000000] You might have to change the root device
[ 0.000000] from /dev/hd[a-d] to /dev/xvd[a-d]
[ 0.000000] in your root= kernel command line option
[ 0.000000] e820: last_pfn = 0x40000 max_arch_pfn = 0x400000000
[ 0.000000] PAT configuration [0-7]: WB WC UC- UC WB WP UC- UC 
[ 0.000000] found SMP MP-table at [mem 0x000fbc50-0x000fbc5f] mapped at [ffffffffff200c50]
[ 0.000000] Early table checksum verification disabled
[ 0.000000] ACPI: RSDP 00000000000ea020 00024 (v02 Xen)
[ 0.000000] ACPI: XSDT 00000000fc00e2a0 00054 (v01 Xen HVM 00000000 HVML 00000000)
[ 0.000000] ACPI: FACP 00000000fc00df60 000F4 (v04 Xen HVM 00000000 HVML 00000000)
[ 0.000000] ACPI: DSDT 00000000fc0021c0 0BD19 (v02 Xen HVM 00000000 INTL 20090123)
[ 0.000000] ACPI: FACS 00000000fc002180 00040
[ 0.000000] ACPI: APIC 00000000fc00e060 000D8 (v02 Xen HVM 00000000 HVML 00000000)
[ 0.000000] ACPI: HPET 00000000fc00e1b0 00038 (v01 Xen HVM 00000000 HVML 00000000)
[ 0.000000] ACPI: WAET 00000000fc00e1f0 00028 (v01 Xen HVM 00000000 HVML 00000000)
[ 0.000000] ACPI: SSDT 00000000fc00e220 00031 (v02 Xen HVM 00000000 INTL 20090123)
[ 0.000000] ACPI: SSDT 00000000fc00e260 00033 (v02 Xen HVM 00000000 INTL 20090123)
[ 0.000000] No NUMA configuration found
[ 0.000000] Faking a node at [mem 0x0000000000000000-0x000000003fffffff]
[ 0.000000] NODE_DATA(0) allocated [mem 0x3ffd9000-0x3fffffff]
[ 0.000000] crashkernel=auto resulted in zero bytes of reserved memory.
[ 0.000000] Zone ranges:
[ 0.000000] DMA [mem 0x00001000-0x00ffffff]
[ 0.000000] DMA32 [mem 0x01000000-0xffffffff]
[ 0.000000] Normal empty
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x00001000-0x0009dfff]
[ 0.000000] node 0: [mem 0x00100000-0x3fffffff]
[ 0.000000] Initmem setup node 0 [mem 0x00001000-0x3fffffff]
[ 0.000000] ACPI: PM-Timer IO Port: 0xb008
[ 0.000000] ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x03] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x04] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x05] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x06] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x07] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x08] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x09] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x0a] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x0b] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x0c] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x0d] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x0e] lapic_id[0x00] disabled)
[ 0.000000] ACPI: IOAPIC (id[0x01] address[0xfec00000] gsi_base[0])
[ 0.000000] IOAPIC[0]: apic_id 1, version 17, address 0xfec00000, GSI 0-47
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 low level)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 low level)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 low level)
[ 0.000000] Using ACPI (MADT) for SMP configuration information
[ 0.000000] ACPI: HPET id: 0x8086a201 base: 0xfed00000
[ 0.000000] smpboot: Allowing 15 CPUs, 14 hotplug CPUs
[ 0.000000] PM: Registered nosave memory: [mem 0x0009e000-0x0009ffff]
[ 0.000000] PM: Registered nosave memory: [mem 0x000a0000-0x000dffff]
[ 0.000000] PM: Registered nosave memory: [mem 0x000e0000-0x000fffff]
[ 0.000000] e820: [mem 0x40000000-0xfbffffff] available for PCI devices
[ 0.000000] Booting paravirtualized kernel on Xen HVM
[ 0.000000] setup_percpu: NR_CPUS:5120 nr_cpumask_bits:15 nr_cpu_ids:15 nr_node_ids:1
[ 0.000000] PERCPU: Embedded 38 pages/cpu @ffff95733e200000 s118784 r8192 d28672 u262144
[ 0.000000] PV qspinlock hash table entries: 256 (order: 0, 4096 bytes)
[ 0.000000] Built 1 zonelists in Node order, mobility grouping on. Total pages: 257928
[ 0.000000] Policy zone: DMA32
[ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.10.0-957.12.2.el7.x86_64 root=UUID=8c1540fa-e2b4-407d-bcd1-59848a73e463 ro console=tty0 console=ttyS0,115200n8 crashkernel=auto console=ttyS0,115200 LANG=en_US.UTF-8
[ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[ 0.000000] x86/fpu: xstate_offset[2]: 0240, xstate_sizes[2]: 0100
[ 0.000000] xsave: enabled xstate_bv 0x7, cntxt size 0x340 using standard form
[ 0.000000] Memory: 1010204k/1048576k available (7668k kernel code, 396k absent, 37976k reserved, 6052k data, 1876k init)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=15, Nodes=1
[ 0.000000] x86/pti: Unmapping kernel while in userspace
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] RCU restricting CPUs from NR_CPUS=5120 to nr_cpu_ids=15.
[ 0.000000] NR_IRQS:327936 nr_irqs:952 0
[ 0.000000] xen:events: Xen HVM callback vector for event delivery is enabled
[ 0.000000] Console: colour VGA+ 80x25
[ 0.000000] console [tty0] enabled
[ 0.000000] Cannot get hvm parameter CONSOLE_EVTCHN (18): -22!
[ 0.000000] console [ttyS0] enabled
[ 0.000000] allocated 4194304 bytes of page_cgroup
[ 0.000000] please try 'cgroup_disable=memory' option if you don't want memory cgroups
[ 0.000000] tsc: Fast TSC calibration using PIT
[ 0.000000] tsc: Detected 2400.106 MHz processor
[ 0.000000] tsc: Detected 2400.042 MHz TSC
[ 0.033000] Calibrating delay loop (skipped), value calculated using timer frequency.. 4800.08 BogoMIPS (lpj=2400042)
[ 0.054004] pid_max: default: 32768 minimum: 301
[ 0.066049] Security Framework initialized
[ 0.072010] SELinux: Initializing.
[ 0.078026] Yama: becoming mindful.
[ 0.084115] Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
[ 0.091198] Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
[ 0.100093] Mount-cache hash table entries: 2048 (order: 2, 16384 bytes)
[ 0.108011] Mountpoint-cache hash table entries: 2048 (order: 2, 16384 bytes)
[ 0.118188] Initializing cgroup subsys memory
[ 0.125014] Initializing cgroup subsys devices
[ 0.132008] Initializing cgroup subsys freezer
[ 0.139006] Initializing cgroup subsys net_cls
[ 0.146007] Initializing cgroup subsys blkio
[ 0.150005] Initializing cgroup subsys perf_event
[ 0.156009] Initializing cgroup subsys hugetlb
[ 0.161003] Initializing cgroup subsys pids
[ 0.165007] Initializing cgroup subsys net_prio
[ 0.171261] mce: CPU supports 2 MCE banks
[ 0.175032] Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0
[ 0.181004] Last level dTLB entries: 4KB 64, 2MB 0, 4MB 0
[ 0.186005] tlb_flushall_shift: 6
[ 0.190008] Speculative Store Bypass: Vulnerable
[ 0.195003] FEATURE SPEC_CTRL Not Present
[ 0.199003] FEATURE IBPB_SUPPORT Not Present
[ 0.204200] Spectre V2 : Vulnerable: Retpoline without IBPB
[ 0.210043] MDS: Vulnerable: Clear CPU buffers attempted, no microcode
[ 0.238349] ACPI: Core revision 20130517
[ 0.247189] ACPI: All ACPI Tables successfully acquired
[ 0.254007] ftrace: allocating 29205 entries in 115 pages
[ 0.256002] random: fast init done
[ 0.305897] IRQ remapping doesn't support X2APIC mode, disable x2apic.
[ 0.312004] Switched APIC routing to physical flat.
[ 0.320607] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=0 pin2=0
[ 0.339531] smpboot: CPU0: Intel(R) Xeon(R) CPU E5-2676 v3 @ 2.40GHz (fam: 06, model: 3f, stepping: 02)
[ 0.355022] installing Xen timer for CPU 0
[ 0.368113] cpu 0 spinlock event irq 53
[ 0.369020] Performance Events: unsupported p6 CPU model 63 no PMU driver, software events only.
[ 0.373244] Brought up 1 CPUs
[ 0.374009] smpboot: Max logical packages: 15
[ 0.375012] smpboot: Total of 1 processors activated (4800.08 BogoMIPS)
[ 0.376471] NMI watchdog: disabled (cpu0): hardware events not enabled
[ 0.377012] NMI watchdog: Shutting down hard lockup detector on all cpus
[ 0.378267] devtmpfs: initialized
[ 0.380557] EVM: security.selinux
[ 0.381029] EVM: security.ima
[ 0.382022] EVM: security.capability
[ 0.384183] atomic64 test passed for x86-64 platform with CX8 and with SSE
[ 0.385033] pinctrl core: initialized pinctrl subsystem
[ 0.386090] RTC time: 4:35:08, date: 06/10/19
[ 0.387135] NET: Registered protocol family 16
[ 0.388193] ACPI: bus type PCI registered
[ 0.389008] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
[ 0.390446] PCI: Using configuration type 1 for base access
[ 0.392153] ACPI: Added _OSI(Module Device)
[ 0.393011] ACPI: Added _OSI(Processor Device)
[ 0.394009] ACPI: Added _OSI(3.0 _SCP Extensions)
[ 0.395011] ACPI: Added _OSI(Processor Aggregator Device)
[ 0.396018] ACPI: Added _OSI(Linux-Dell-Video)
[ 0.401442] ACPI: Interpreter enabled
[ 0.402027] ACPI: (supports S0 S3 S4 S5)
[ 0.403008] ACPI: Using IOAPIC for interrupt routing
[ 0.404054] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[ 0.405299] ACPI: Enabled 2 GPEs in block 00 to 0F
[ 0.488351] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[ 0.489015] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI]
[ 0.490019] acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM
[ 0.491027] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.
[ 0.493000] acpiphp: Slot [0] registered
[ 0.494441] acpiphp: Slot [3] registered
[ 0.495647] acpiphp: Slot [4] registered
[ 0.496542] acpiphp: Slot [5] registered
[ 0.497563] acpiphp: Slot [6] registered
[ 0.498589] acpiphp: Slot [7] registered
[ 0.499677] acpiphp: Slot [8] registered
[ 0.500524] acpiphp: Slot [9] registered
[ 0.501578] acpiphp: Slot [10] registered
[ 0.502555] acpiphp: Slot [11] registered
[ 0.503574] acpiphp: Slot [12] registered
[ 0.504573] acpiphp: Slot [13] registered
[ 0.505520] acpiphp: Slot [14] registered
[ 0.506696] acpiphp: Slot [15] registered
[ 0.507563] acpiphp: Slot [16] registered
[ 0.508537] acpiphp: Slot [17] registered
[ 0.509539] acpiphp: Slot [18] registered
[ 0.510586] acpiphp: Slot [19] registered
[ 0.511477] acpiphp: Slot [20] registered
[ 0.512474] acpiphp: Slot [21] registered
[ 0.513478] acpiphp: Slot [22] registered
[ 0.514604] acpiphp: Slot [23] registered
[ 0.515597] acpiphp: Slot [24] registered
[ 0.516559] acpiphp: Slot [25] registered
[ 0.517486] acpiphp: Slot [26] registered
[ 0.518526] acpiphp: Slot [27] registered
[ 0.519710] acpiphp: Slot [28] registered
[ 0.520519] acpiphp: Slot [29] registered
[ 0.521560] acpiphp: Slot [30] registered
[ 0.522669] acpiphp: Slot [31] registered
[ 0.523475] PCI host bridge to bus 0000:00
[ 0.524011] pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7 window]
[ 0.525013] pci_bus 0000:00: root bus resource [io 0x0d00-0xffff window]
[ 0.526016] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
[ 0.527012] pci_bus 0000:00: root bus resource [mem 0xf0000000-0xfbffffff window]
[ 0.528012] pci_bus 0000:00: root bus resource [bus 00-ff]
[ 0.537346] pci 0000:00:01.1: legacy IDE quirk: reg 0x10: [io 0x01f0-0x01f7]
[ 0.538014] pci 0000:00:01.1: legacy IDE quirk: reg 0x14: [io 0x03f6]
[ 0.539011] pci 0000:00:01.1: legacy IDE quirk: reg 0x18: [io 0x0170-0x0177]
[ 0.540009] pci 0000:00:01.1: legacy IDE quirk: reg 0x1c: [io 0x0376]
[ 0.541969] * Found PM-Timer Bug on the chipset. Due to workarounds for a bug,
[ 0.541969] * this clock source is slow. Consider trying other clock sources
[ 0.543627] pci 0000:00:01.3: quirk: [io 0xb000-0xb03f] claimed by PIIX4 ACPI
[ 0.554790] ACPI: PCI Interrupt Link [LNKA] (IRQs *5 10 11)
[ 0.558292] ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
[ 0.562316] ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
[ 0.567303] ACPI: PCI Interrupt Link [LNKD] (IRQs *5 10 11)
[ 0.599028] xen:balloon: Initialising balloon driver
[ 0.603200] vgaarb: device added: PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none
[ 0.604015] vgaarb: loaded
[ 0.605007] vgaarb: bridge control possible 0000:00:02.0
[ 0.606145] SCSI subsystem initialized
[ 0.607058] ACPI: bus type USB registered
[ 0.608038] usbcore: registered new interface driver usbfs
[ 0.609037] usbcore: registered new interface driver hub
[ 0.610053] usbcore: registered new device driver usb
[ 0.611122] EDAC MC: Ver: 3.0.0
[ 0.612996] PCI: Using ACPI for IRQ routing
[ 0.613928] NetLabel: Initializing
[ 0.614009] NetLabel: domain hash size = 128
[ 0.615007] NetLabel: protocols = UNLABELED CIPSOv4
[ 0.616029] NetLabel: unlabeled traffic allowed by default
[ 0.617127] HPET: 3 timers in total, 0 timers will be used for per-cpu timer
[ 0.618026] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0
[ 0.621008] hpet0: 3 comparators, 64-bit 62.500000 MHz counter
[ 0.624030] amd_nb: Cannot enumerate AMD northbridges
[ 0.625034] Switched to clocksource xen
[ 0.635109] pnp: PnP ACPI init
[ 0.639845] ACPI: bus type PNP registered
[ 0.644108] system 00:00: [mem 0x00000000-0x0009ffff] could not be reserved
[ 0.652839] system 00:01: [io 0x08a0-0x08a3] has been reserved
[ 0.658802] system 00:01: [io 0x0cc0-0x0ccf] has been reserved
[ 0.665591] system 00:01: [io 0x04d0-0x04d1] has been reserved
[ 0.685829] system 00:07: [io 0x10c0-0x1141] has been reserved
[ 0.694622] system 00:07: [io 0xb044-0xb047] has been reserved
[ 0.738502] pnp: PnP ACPI: found 8 devices
[ 0.743332] ACPI: bus type PNP unregistered
[ 0.754472] NET: Registered protocol family 2
[ 0.762131] TCP established hash table entries: 8192 (order: 4, 65536 bytes)
[ 0.771558] TCP bind hash table entries: 8192 (order: 5, 131072 bytes)
[ 0.779423] TCP: Hash tables configured (established 8192 bind 8192)
[ 0.786218] TCP: reno registered
[ 0.790841] UDP hash table entries: 512 (order: 2, 16384 bytes)
[ 0.797336] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
[ 0.803928] NET: Registered protocol family 1
[ 0.808866] pci 0000:00:00.0: Limiting direct PCI/PCI transfers
[ 0.815293] pci 0000:00:01.0: PIIX3: Enabling Passive Release
[ 0.822831] pci 0000:00:01.0: Activating ISA DMA hang workarounds
[ 0.829686] RAPL PMU: API unit is 2^-32 Joules, 3 fixed counters, 655360 ms ovfl timer
[ 0.838444] RAPL PMU: hw unit of domain pp0-core 2^-14 Joules
[ 0.848977] RAPL PMU: hw unit of domain package 2^-14 Joules
[ 0.860997] RAPL PMU: hw unit of domain dram 2^-16 Joules
[ 0.870011] sha1_ssse3: Using AVX2 optimized SHA-1 implementation
[ 0.879015] sha256_ssse3: Using AVX2 optimized SHA-256 implementation
[ 0.889003] futex hash table entries: 4096 (order: 6, 262144 bytes)
[ 0.898305] Initialise system trusted keyring
[ 0.906193] audit: initializing netlink socket (disabled)
[ 0.911444] type=2000 audit(1560141308.791:1): initialized
[ 0.939805] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[ 0.948315] zpool: loaded
[ 0.952475] zbud: loaded
[ 0.956299] VFS: Disk quotas dquot_6.5.2
[ 0.960830] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ 0.968459] msgmni has been set to 1973
[ 0.973029] Key type big_key registered
[ 0.977696] NET: Registered protocol family 38
[ 0.982929] Key type asymmetric registered
[ 0.994689] Asymmetric key parser 'x509' registered
[ 1.002430] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 248)
[ 1.010762] io scheduler noop registered
[ 1.015217] io scheduler deadline registered (default)
[ 1.020203] io scheduler cfq registered
[ 1.024396] io scheduler mq-deadline registered
[ 1.032391] io scheduler kyber registered
[ 1.057909] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[ 1.066003] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
[ 1.073393] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
[ 1.085599] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[ 1.096126] ACPI: Power Button [PWRF]
[ 1.100584] input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
[ 1.117456] ACPI: Sleep Button [SLPF]
[ 1.123301] GHES: HEST is not enabled!
[ 1.128211] xen:grant_table: Grant tables using version 1 layout
[ 1.133883] Grant table initialized
[ 1.141515] Cannot get hvm parameter CONSOLE_EVTCHN (18): -22!
[ 1.150170] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 1.191868] 00:06: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[ 1.198236] Non-volatile memory driver v1.3
[ 1.202620] Linux agpgart interface v0.103
[ 1.214443] crash memory driver: version 1.1
[ 1.224144] rdac: device handler registered
[ 1.228748] hp_sw: device handler registered
[ 1.233225] emc: device handler registered
[ 1.239522] alua: device handler registered
[ 1.244252] libphy: Fixed MDIO Bus: probed
[ 1.249795] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.255860] ehci-pci: EHCI PCI platform driver
[ 1.266779] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 1.275309] ohci-pci: OHCI PCI platform driver
[ 1.280149] uhci_hcd: USB Universal Host Controller Interface driver
[ 1.286429] usbcore: registered new interface driver usbserial_generic
[ 1.293367] usbserial: USB Serial support registered for generic
[ 1.299490] i8042: PNP: PS/2 Controller [PNP0303:PS2K,PNP0f13:PS2M] at 0x60,0x64 irq 1,12
[ 1.310992] serio: i8042 KBD port at 0x60,0x64 irq 1
[ 1.316187] serio: i8042 AUX port at 0x60,0x64 irq 12
[ 1.321837] mousedev: PS/2 mouse device common for all mice
[ 1.328602] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input2
[ 1.339792] rtc_cmos 00:02: rtc core: registered rtc_cmos as rtc0
[ 1.345882] rtc_cmos 00:02: alarms up to one day, 114 bytes nvram, hpet irqs
[ 1.360276] cpuidle: using governor menu
[ 1.365523] hidraw: raw HID events driver (C) Jiri Kosina
[ 1.371455] usbcore: registered new interface driver usbhid
[ 1.377505] usbhid: USB HID core driver
[ 1.384544] drop_monitor: Initializing network drop monitor service
[ 1.394748] TCP: cubic registered
[ 1.398447] Initializing XFRM netlink socket
[ 1.402918] NET: Registered protocol family 10
[ 1.408853] NET: Registered protocol family 17
[ 1.413762] mpls_gso: MPLS GSO support
[ 1.418580] intel_rdt: Intel RDT L3 allocation detected
[ 1.424320] Loading compiled-in X.509 certificates
[ 1.429870] Loaded X.509 cert 'CentOS Linux kpatch signing key: ea0413152cde1d98ebdca3fe6f0230904c9ef717'
[ 1.448300] Loaded X.509 cert 'CentOS Linux Driver update signing key: 7f421ee0ab69461574bb358861dbe77762a4201b'
[ 1.458077] Loaded X.509 cert 'CentOS Linux kernel signing key: 8de64fb5969b557edc7f032eeabcbe4f37177f4e'
[ 1.469216] registered taskstats version 1
[ 1.474459] Key type trusted registered
[ 1.479433] Key type encrypted registered
[ 1.484383] IMA: No TPM chip found, activating TPM-bypass! (rc=-19)
[ 1.491593] xenbus_probe_frontend: Device with no driver: device/vbd/768
[ 1.498647] xenbus_probe_frontend: Device with no driver: device/vif/0
[ 1.505543] Magic number: 7:202:565
[ 1.510384] rtc_cmos 00:02: setting system clock to 2019-06-10 04:35:10 UTC (1560141310)
[ 1.872128] tsc: Refined TSC clocksource calibration: 2399.999 MHz
[ 2.221301] input: ImExPS/2 Generic Explorer Mouse as /devices/platform/i8042/serio1/input/input3
[ 2.230566] md: Waiting for all devices to be available before autodetect
[ 2.238754] md: If you don't use raid, use raid=noautodetect
[ 2.244182] md: Autodetecting RAID arrays.
[ 2.248408] md: autorun ...
[ 2.252532] md: ... autorun DONE.
[ 2.256970] List of all partitions:
[ 2.262893] No filesystem could mount root, tried: 
[ 2.284579] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 2.285555] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.10.0-957.12.2.el7.x86_64 #1
[ 2.285555] Hardware name: Xen HVM domU, BIOS 4.2.amazon 08/24/2006
[ 2.285555] Call Trace:
[ 2.285555] [<ffffffffbcf63041>] dump_stack+0x19/0x1b
[ 2.285555] [<ffffffffbcf5c750>] panic+0xe8/0x21f
[ 2.285555] [<ffffffffbd586761>] mount_block_root+0x291/0x2a0
[ 2.285555] [<ffffffffbd5867c3>] mount_root+0x53/0x56
[ 2.285555] [<ffffffffbd586902>] prepare_namespace+0x13c/0x174
[ 2.285555] [<ffffffffbd5863df>] kernel_init_freeable+0x1f8/0x21f
[ 2.285555] [<ffffffffbd585b1f>] ? initcall_blacklist+0xb0/0xb0
[ 2.285555] [<ffffffffbcf51120>] ? rest_init+0x80/0x80
[ 2.285555] [<ffffffffbcf5112e>] kernel_init+0xe/0x100
[ 2.285555] [<ffffffffbcf75c37>] ret_from_fork_nospec_begin+0x21/0x21
[ 2.285555] [<ffffffffbcf51120>] ? rest_init+0x80/0x80