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* [BUG] kernel BUG at drivers/block/xen-blkfront.c:1711
@ 2016-06-06  8:24 Evgenii Shatokhin
  2016-06-06  8:42 ` Dario Faggioli
  0 siblings, 1 reply; 15+ messages in thread
From: Evgenii Shatokhin @ 2016-06-06  8:24 UTC (permalink / raw)
  To: xen-devel

[-- Attachment #1: Type: text/plain, Size: 5155 bytes --]

(Resending this bug report because the message I sent last week did not 
make it to the mailing list somehow.)

Hi,

One of our users gets kernel panics from time to time when he tries to 
use his Amazon EC2 instance with CentOS7 x64 in it [1]. Kernel panic 
happens within minutes from the moment the instance starts. The problem 
does not show up every time, however.

The user first observed the problem with a custom kernel, but it was 
found later that the stock kernel 3.10.0-327.18.2.el7.x86_64 from 
CentOS7 was affected as well.

The part of the system log he was able to retrieve is attached. Here is 
the bug info, for convenience:

------------------------------------
[    2.246912] kernel BUG at drivers/block/xen-blkfront.c:1711!
[    2.246912] invalid opcode: 0000 [#1] SMP
[    2.246912] Modules linked in: ata_generic pata_acpi crct10dif_pclmul 
crct10dif_common crc32_pclmul crc32c_intel ghash_clmulni_intel 
xen_netfront xen_blkfront(+) aesni_intel lrw ata_piix gf128mul 
glue_helper ablk_helper cryptd libata serio_raw floppy sunrpc dm_mirror 
dm_region_hash dm_log dm_mod scsi_transport_iscsi
[    2.246912] CPU: 1 PID: 50 Comm: xenwatch Not tainted 
3.10.0-327.18.2.el7.x86_64 #1
[    2.246912] Hardware name: Xen HVM domU, BIOS 4.2.amazon 12/07/2015
[    2.246912] task: ffff8800e9fcb980 ti: ffff8800e98bc000 task.ti: 
ffff8800e98bc000
[    2.246912] RIP: 0010:[<ffffffffa015584f>]  [<ffffffffa015584f>] 
blkfront_setup_indirect+0x41f/0x430 [xen_blkfront]
[    2.246912] RSP: 0018:ffff8800e98bfcd0  EFLAGS: 00010283
[    2.246912] RAX: ffff8800353e15c0 RBX: ffff8800e98c52c8 RCX: 
0000000000000020
[    2.246912] RDX: ffff8800353e15b0 RSI: ffff8800e98c52b8 RDI: 
ffff8800353e15d0
[    2.246912] RBP: ffff8800e98bfd20 R08: ffff8800353e15b0 R09: 
ffff8800eb403c00
[    2.246912] R10: ffffffffa0155532 R11: ffffffffffffffe8 R12: 
ffff8800e98c4000
[    2.246912] R13: ffff8800e98c52b8 R14: 0000000000000020 R15: 
ffff8800353e15c0
[    2.246912] FS:  0000000000000000(0000) GS:ffff8800efc20000(0000) 
knlGS:0000000000000000
[    2.246912] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.246912] CR2: 00007f1b615ef000 CR3: 00000000e2b44000 CR4: 
00000000001406e0
[    2.246912] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 
0000000000000000
[    2.246912] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 
0000000000000400
[    2.246912] Stack:
[    2.246912]  0000000000000020 0000000000000001 00000020a0157217 
00000100e98bfdbc
[    2.246912]  0000000027efa3ef ffff8800e98bfdbc ffff8800e98ce000 
ffff8800e98c4000
[    2.246912]  ffff8800e98ce040 0000000000000001 ffff8800e98bfe08 
ffffffffa0155d4c
[    2.246912] Call Trace:
[    2.246912]  [<ffffffffa0155d4c>] blkback_changed+0x4ec/0xfc8 
[xen_blkfront]
[    2.246912]  [<ffffffff813a6fd0>] ? xenbus_gather+0x170/0x190
[    2.246912]  [<ffffffff816322f5>] ? __slab_free+0x10e/0x277
[    2.246912]  [<ffffffff813a805d>] xenbus_otherend_changed+0xad/0x110
[    2.246912]  [<ffffffff813a7257>] ? xenwatch_thread+0x77/0x180
[    2.246912]  [<ffffffff813a9ba3>] backend_changed+0x13/0x20
[    2.246912]  [<ffffffff813a7246>] xenwatch_thread+0x66/0x180
[    2.246912]  [<ffffffff810a6ae0>] ? wake_up_atomic_t+0x30/0x30
[    2.246912]  [<ffffffff813a71e0>] ? unregister_xenbus_watch+0x1f0/0x1f0
[    2.246912]  [<ffffffff810a5aef>] kthread+0xcf/0xe0
[    2.246912]  [<ffffffff810a5a20>] ? kthread_create_on_node+0x140/0x140
[    2.246912]  [<ffffffff81646118>] ret_from_fork+0x58/0x90
[    2.246912]  [<ffffffff810a5a20>] ? kthread_create_on_node+0x140/0x140
[    2.246912] Code: e1 48 85 c0 75 ce 49 8d 84 24 40 01 00 00 48 89 45 
b8 e9 91 fd ff ff 4c 89 ff e8 8d ae 06 e1 e9 f2 fc ff ff 31 c0 e9 2e fe 
ff ff <0f> 0b e8 9a 57 f2 e0 0f 0b 0f 1f 84 00 00 00 00 00 0f 1f 44 00
[    2.246912] RIP  [<ffffffffa015584f>] 
blkfront_setup_indirect+0x41f/0x430 [xen_blkfront]
[    2.246912]  RSP <ffff8800e98bfcd0>
[    2.491574] ---[ end trace 8a9b992812627c71 ]---
[    2.495618] Kernel panic - not syncing: Fatal exception
------------------------------------

Xen version 4.2.

EC2 instance type: c3.large with EBS magnetic storage, if that matters.

Here is the code where the BUG_ON triggers (drivers/block/xen-blkfront.c):
------------------------------------
if (!info->feature_persistent && info->max_indirect_segments) {
     /*
         * We are using indirect descriptors but not persistent
         * grants, we need to allocate a set of pages that can be
         * used for mapping indirect grefs
         */
     int num = INDIRECT_GREFS(segs) * BLK_RING_SIZE;

     BUG_ON(!list_empty(&info->indirect_pages)); // << This one hits.
     for (i = 0; i < num; i++) {
         struct page *indirect_page = alloc_page(GFP_NOIO);
         if (!indirect_page)
             goto out_of_memory;
         list_add(&indirect_page->lru, &info->indirect_pages);
     }
}
------------------------------------

As we checked, 'info->indirect_pages' list indeed contained around 30 
elements at that point.

Any ideas what may cause this and how to fix it?

If any other data are needed, please let me know.

Regards,
Evgenii

References:
[1] https://bugs.openvz.org/browse/OVZ-6718

[-- Attachment #2: panic-3.10.0-327.18.2.el7.log --]
[-- Type: text/x-log, Size: 64535 bytes --]

guration space under this bridge.
[    0.279801] acpiphp: Slot [0] registered
[    0.280894] acpiphp: Slot [3] registered
[    0.281329] acpiphp: Slot [4] registered
[    0.282311] acpiphp: Slot [5] registered
[    0.283323] acpiphp: Slot [6] registered
[    0.284325] acpiphp: Slot [7] registered
[    0.285224] acpiphp: Slot [8] registered
[    0.286224] acpiphp: Slot [9] registered
[    0.287232] acpiphp: Slot [10] registered
[    0.288224] acpiphp: Slot [11] registered
[    0.289224] acpiphp: Slot [12] registered
[    0.290231] acpiphp: Slot [13] registered
[    0.291221] acpiphp: Slot [14] registered
[    0.292246] acpiphp: Slot [15] registered
[    0.293254] acpiphp: Slot [16] registered
[    0.294302] acpiphp: Slot [17] registered
[    0.295221] acpiphp: Slot [18] registered
[    0.296239] acpiphp: Slot [19] registered
[    0.297227] acpiphp: Slot [20] registered
[    0.298220] acpiphp: Slot [21] registered
[    0.299236] acpiphp: Slot [22] registered
[    0.300228] acpiphp: Slot [23] registered
[    0.301329] acpiphp: Slot [24] registered
[    0.302308] acpiphp: Slot [25] registered
[    0.303229] acpiphp: Slot [26] registered
[    0.304257] acpiphp: Slot [27] registered
[    0.305279] acpiphp: Slot [28] registered
[    0.306237] acpiphp: Slot [29] registered
[    0.307307] acpiphp: Slot [30] registered
[    0.308453] acpiphp: Slot [31] registered
[    0.309222] PCI host bridge to bus 0000:00
[    0.310007] pci_bus 0000:00: root bus resource [bus 00-ff]
[    0.311005] pci_bus 0000:00: root bus resource [io  0x0000-0x0cf7]
[    0.312005] pci_bus 0000:00: root bus resource [io  0x0d00-0xffff]
[    0.313005] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff]
[    0.314007] pci_bus 0000:00: root bus resource [mem 0xf0000000-0xfbffffff]
[    0.319000] pci 0000:00:01.1: legacy IDE quirk: reg 0x10: [io  0x01f0-0x01f7]
[    0.319005] pci 0000:00:01.1: legacy IDE quirk: reg 0x14: [io  0x03f6]
[    0.320005] pci 0000:00:01.1: legacy IDE quirk: reg 0x18: [io  0x0170-0x0177]
[    0.321004] pci 0000:00:01.1: legacy IDE quirk: reg 0x1c: [io  0x0376]
[    0.322525] * Found PM-Timer Bug on the chipset. Due to workarounds for a bug,
[    0.322525] * this clock source is slow. Consider trying other clock sources
[    0.323896] pci 0000:00:01.3: quirk: [io  0xb000-0xb03f] claimed by PIIX4 ACPI
[    0.329204] ACPI: PCI Interrupt Link [LNKA] (IRQs *5 10 11)
[    0.332189] ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
[    0.335218] ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
[    0.338169] ACPI: PCI Interrupt Link [LNKD] (IRQs *5 10 11)
[    0.354922] ACPI: Enabled 2 GPEs in block 00 to 0F
[    0.355072] xen:balloon: Initialising balloon driver
[    0.360028] xen_balloon: Initialising balloon driver
[    0.363061] vgaarb: device added: PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none
[    0.368005] vgaarb: loaded
[    0.370004] vgaarb: bridge control possible 0000:00:02.0
[    0.373107] SCSI subsystem initialized
[    0.375031] ACPI: bus type USB registered
[    0.378017] usbcore: registered new interface driver usbfs
[    0.381013] usbcore: registered new interface driver hub
[    0.384040] usbcore: registered new device driver usb
[    0.387049] PCI: Using ACPI for IRQ routing
[    0.388393] NetLabel: Initializing
[    0.389004] NetLabel:  domain hash size = 128
[    0.390003] NetLabel:  protocols = UNLABELED CIPSOv4
[    0.391014] NetLabel:  unlabeled traffic allowed by default
[    0.392036] HPET: 3 timers in total, 0 timers will be used for per-cpu timer
[    0.393015] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0
[    0.395980] hpet0: 3 comparators, 64-bit 62.500000 MHz counter
[    0.397015] Switching to clocksource xen
[    0.402192] pnp: PnP ACPI init
[    0.404945] ACPI: bus type PNP registered
[    0.407526] system 00:00: [mem 0x00000000-0x0009ffff] could not be reserved
[    0.411417] system 00:02: [io  0x08a0-0x08a3] has been reserved
[    0.414921] system 00:02: [io  0x0cc0-0x0ccf] has been reserved
[    0.418355] system 00:02: [io  0x04d0-0x04d1] has been reserved
[    0.421858] system 00:0a: [io  0x10c0-0x1141] has been reserved
[    0.425302] system 00:0a: [io  0xb044-0xb047] has been reserved
[    0.444276] pnp: PnP ACPI: found 11 devices
[    0.446913] ACPI: bus type PNP unregistered
[    0.457144] NET: Registered protocol family 2
[    0.460015] TCP established hash table entries: 32768 (order: 6, 262144 bytes)
[    0.464711] TCP bind hash table entries: 32768 (order: 7, 524288 bytes)
[    0.468506] TCP: Hash tables configured (established 32768 bind 32768)
[    0.472071] TCP: reno registered
[    0.474282] UDP hash table entries: 2048 (order: 4, 65536 bytes)
[    0.477797] UDP-Lite hash table entries: 2048 (order: 4, 65536 bytes)
[    0.481524] NET: Registered protocol family 1
[    0.484246] pci 0000:00:00.0: Limiting direct PCI/PCI transfers
[    0.487633] pci 0000:00:01.0: PIIX3: Enabling Passive Release
[    0.490939] pci 0000:00:01.0: Activating ISA DMA hang workarounds
[    0.494838] Unpacking initramfs...
[    0.997892] Freeing initrd memory: 40760k freed
[    1.009863] RAPL PMU detected, API unit is 2^-32 Joules, 3 fixed counters 163840 ms ovfl timer
[    1.014966] hw unit of domain pp0-core 2^-16 Joules
[    1.017818] hw unit of domain package 2^-16 Joules
[    1.020651] hw unit of domain dram 2^-16 Joules
[    1.023879] microcode: CPU0 sig=0x306e4, pf=0x1, revision=0x428
[    1.027294] microcode: CPU1 sig=0x306e4, pf=0x1, revision=0x428
[    1.031590] microcode: Microcode Update Driver: v2.00 <tigran@aivazian.fsnet.co.uk>, Peter Oruba
[    1.036685] sha1_ssse3: Using AVX optimized SHA-1 implementation
[    1.040317] sha256_ssse3: Using AVX optimized SHA-256 implementation
[    1.045269] futex hash table entries: 4096 (order: 6, 262144 bytes)
[    1.048768] Initialise system trusted keyring
[    1.051522] audit: initializing netlink socket (disabled)
[    1.054635] type=2000 audit(1464346363.609:1): initialized
[    1.075595] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[    1.079934] zpool: loaded
[    1.081908] zbud: loaded
[    1.084011] VFS: Disk quotas dquot_6.5.2
[    1.086631] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[    1.090462] msgmni has been set to 7202
[    1.093662] Key type big_key registered
[    1.097081] NET: Registered protocol family 38
[    1.099855] Key type asymmetric registered
[    1.102532] Asymmetric key parser 'x509' registered
[    1.105495] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251)
[    1.110062] io scheduler noop registered
[    1.112578] io scheduler deadline registered (default)
[    1.115768] io scheduler cfq registered
[    1.118452] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[    1.122616] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
[    1.127285] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[    1.132226] ACPI: Power Button [PWRF]
[    1.134707] input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
[    1.139197] ACPI: Sleep Button [SLPF]
[    1.141723] GHES: HEST is not enabled!
[    1.144753] xen:grant_table: Grant tables using version 1 layout
[    1.148312] Grant table initialized
[    1.150821] Cannot get hvm parameter CONSOLE_EVTCHN (18): -22!
[    1.154119] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    1.183355] 00:09: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[    1.187344] Non-volatile memory driver v1.3
[    1.190059] Linux agpgart interface v0.103
[    1.192834] crash memory driver: version 1.1
[    1.195643] rdac: device handler registered
[    1.198497] hp_sw: device handler registered
[    1.201231] emc: device handler registered
[    1.204116] alua: device handler registered
[    1.206754] libphy: Fixed MDIO Bus: probed
[    1.209451] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    1.213000] ehci-pci: EHCI PCI platform driver
[    1.215827] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    1.220470] ohci-pci: OHCI PCI platform driver
[    1.223221] uhci_hcd: USB Universal Host Controller Interface driver
[    1.226804] usbcore: registered new interface driver usbserial
[    1.230172] usbcore: registered new interface driver usbserial_generic
[    1.233860] usbserial: USB Serial support registered for generic
[    1.237314] i8042: PNP: PS/2 Controller [PNP0303:PS2K,PNP0f13:PS2M] at 0x60,0x64 irq 1,12
[    1.243440] serio: i8042 KBD port at 0x60,0x64 irq 1
[    1.246457] serio: i8042 AUX port at 0x60,0x64 irq 12
[    1.249746] mousedev: PS/2 mouse device common for all mice
[    1.253404] rtc_cmos 00:04: rtc core: registered rtc_cmos as rtc0
[    1.256926] rtc_cmos 00:04: alarms up to one day, 114 bytes nvram, hpet irqs
[    1.260950] cpuidle: using governor menu
[    1.263642] hidraw: raw HID events driver (C) Jiri Kosina
[    1.266788] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input2
[    1.266849] usbcore: registered new interface driver usbhid
[    1.266849] usbhid: USB HID core driver
[    1.266881] drop_monitor: Initializing network drop monitor service
[    1.266949] TCP: cubic registered
[    1.266951] Initializing XFRM netlink socket
[    1.267018] NET: Registered protocol family 10
[    1.267233] NET: Registered protocol family 17
[    1.267419] Loading compiled-in X.509 certificates
[    1.267441] Loaded X.509 cert 'CentOS Linux kpatch signing key: ea0413152cde1d98ebdca3fe6f0230904c9ef717'
[    1.267474] Loaded X.509 cert 'CentOS Linux Driver update signing key: 7f421ee0ab69461574bb358861dbe77762a4201b'
[    1.267917] Loaded X.509 cert 'CentOS Linux kernel signing key: eb2791de1abea5f95aa5bcb891e1332bed298e5e'
[    1.267933] registered taskstats version 1
[    1.269754] Key type trusted registered
[    1.271355] Key type encrypted registered
[    1.273232] IMA: No TPM chip found, activating TPM-bypass!
[    1.273637] xenbus_probe_frontend: Device with no driver: device/vfb/0
[    1.273637] xenbus_probe_frontend: Device with no driver: device/vbd/768
[    1.273638] xenbus_probe_frontend: Device with no driver: device/vbd/51744
[    1.273639] xenbus_probe_frontend: Device with no driver: device/vbd/51760
[    1.273639] xenbus_probe_frontend: Device with no driver: device/vbd/51792
[    1.273640] xenbus_probe_frontend: Device with no driver: device/vbd/51728
[    1.273640] xenbus_probe_frontend: Device with no driver: device/vbd/51712
[    1.273641] xenbus_probe_frontend: Device with no driver: device/vif/0
[    1.273642] xenbus_probe_frontend: Device with no driver: device/vif/1
[    1.401363] rtc_cmos 00:04: setting system clock to 2016-05-27 10:52:44 UTC (1464346364)
[    1.408546] Freeing unused kernel memory: 1620k freed
[    1.416997] systemd[1]: systemd 219 running in system mode. (+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ -LZ4 -SECCOMP +BLKID +ELFUTILS +KMOD +IDN)
[    1.426685] systemd[1]: Detected virtualization xen.
[    1.429672] systemd[1]: Detected architecture x86-64.
[    1.432657] systemd[1]: Running in initial RAM disk.

Welcome to ^[[0;34mCentOS Linux 7 (Core) dracut-033-360.el7_2 (Initramfs)^[[0m!

[    1.438782] systemd[1]: No hostname configured.
[    1.441531] systemd[1]: Set hostname to <localhost>.
[    1.444474] systemd[1]: Initializing machine ID from random generator.
[^[[32m  OK  ^[[0m] Reached target Swap.
[    1.479278] systemd[1]: Reached target Swap.
[    1.481937] systemd[1]: Starting Swap.
[^[[32m  OK  ^[[0m] Reached target Timers.
[    1.486406] systemd[1]: Reached target Timers.
[    1.489146] systemd[1]: Starting Timers.
[    1.491664] systemd[1]: Started Dispatch Password Requests to Console Directory Watch.
[    1.496311] systemd[1]: Starting Dispatch Password Requests to Console Directory Watch.
[^[[32m  OK  ^[[0m] Reached target Encrypted Volumes.
[    1.503451] systemd[1]: Reached target Encrypted Volumes.
[    1.506505] systemd[1]: Starting Encrypted Volumes.
[^[[32m  OK  ^[[0m] Created slice -.slice.
[    1.511699] systemd[1]: Created slice -.slice.
[    1.514432] systemd[1]: Starting -.slice.
[^[[32m  OK  ^[[0m] Created slice System Slice.
[    1.519249] systemd[1]: Created slice System Slice.
[    1.522132] systemd[1]: Starting System Slice.
[^[[32m  OK  ^[[0m] Listening on Journal Socket.
[    1.527129] systemd[1]: Listening on Journal Socket.
[    1.530037] systemd[1]: Starting Journal Socket.
[    1.532827] systemd[1]: Started dracut ask for additional cmdline parameters.
[    1.537118] systemd[1]: Starting dracut cmdline hook...
         Starting dracut cmdline hook...
[^[[32m  OK  ^[[0m] Reached target Slices.
[    1.546341] systemd[1]: Reached target Slices.
[    1.550241] systemd[1]: Starting Slices.
[    1.554277] systemd[1]: Starting Create list of required static device nodes for the current kernel...
         Starting Create list of required st... nodes for the current kernel...
[^[[32m  OK  ^[[0m] Reached target Local File Systems.
[    1.568827] systemd[1]: Reached target Local File Systems.
[    1.573155] systemd[1]: Starting Local File Systems.
[^[[32m  OK  ^[[0m] Listening on udev Kernel Socket.
[    1.580075] systemd[1]: Listening on udev Kernel Socket.
[    1.584280] systemd[1]: Starting udev Kernel Socket.
[    1.588384] systemd[1]: Started Load Kernel Modules.
[    1.592835] systemd[1]: Starting Apply Kernel Variables...
         Starting Apply Kernel Variables...
[^[[32m  OK  ^[[0m] Reached target Paths.
[    1.602862] systemd[1]: Reached target Paths.
[    1.606580] systemd[1]: Starting Paths.
[    1.610425] systemd[1]: Starting Journal Service...
         Starting Journal Service...
[^[[32m  OK  ^[[0m] Listening on udev Control Socket.
[    1.629079] systemd[1]: Listening on udev Control Socket.
[    1.633320] systemd[1]: Starting udev Control Socket.
[^[[32m  OK  ^[[0m] Started Journal Service.
[    1.646576] systemd[1]: Started Journal Service.
[^[[32m  OK  ^[[0m] Started Create list of required sta...ce nodes for the current kernel.
[^[[32m  OK  ^[[0m] Started Apply Kernel Variables.
         Starting Create Static Device Nodes in /dev...
[^[[32m  OK  ^[[0m] Started dracut cmdline hook.
[^[[32m  OK  ^[[0m] Started Create Static Device Nodes in /dev.
         Starting Open-iSCSI...
         Starting dracut pre-udev hook...
[    1.683952] Loading iSCSI transport class v2.0-870.
[^[[32m  OK  ^[[0m] Started Open-iSCSI.
[    1.693868] device-mapper: uevent: version 1.0.3
[    1.697023] device-mapper: ioctl: 4.33.0-ioctl (2015-8-18) initialised: dm-devel@redhat.com
[    1.713321] RPC: Registered named UNIX socket transport module.
[    1.716597] RPC: Registered udp transport module.
[    1.719379] RPC: Registered tcp transport module.
[    1.722159] RPC: Registered tcp NFSv4.1 backchannel transport module.
[^[[32m  OK  ^[[0m] Started dracut pre-udev hook.
         Starting udev Kernel Device Manager...
[^[[32m  OK  ^[[0m] Started udev Kernel Device Manager.
         Starting dracut pre-trigger hook...
[^[[32m  OK  ^[[0m] Started dracut pre-trigger hook.
         Starting udev Coldplug all Devices...
[^[[32m  OK  ^[[0m] Started udev Coldplug all Devices.
[^[[32m  OK  ^[[0m] Reached target System Initialization.
[^[[32m  OK  ^[[0m] Listening on Open-iSCSI iscsiuio Socket.
[^[[32m  OK  ^[[0m] Reached target Sockets.
[^[[32m  OK  ^[[0m] Reached target Basic System.
         Starting dracut initqueue hook...
         Mounting Configuration File System...
[^[[32m  OK  ^[[0m] Mounted Configuration File System.
[    1.945755] FDC 0 is a S82078B
[    1.974813] scsi host0: ata_piix
[    1.977949] scsi host1: ata_piix
[    1.981382] ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f6 bmdma 0xc100 irq 14
[    1.986145] ata2: PATA max MWDMA2 cmd 0x170 ctl 0x376 bmdma 0xc108 irq 15
[    1.997669] xen_netfront: Initialising Xen virtual ethernet driver
[    1.997669] AES CTR mode by8 optimization enabled
[    2.010685] alg: No test for __gcm-aes-aesni (__driver-gcm-aes-aesni)
[    2.017721] tsc: Refined TSC clocksource calibration: 2800.000 MHz
[    2.030525] alg: No test for crc32 (crc32-pclmul)
[    2.048336] blkfront: xvda: barrier or flush: disabled; persistent grants: disabled; indirect descriptors: enabled;
[    2.063996]  xvda: xvda1
[    2.088850] Setting capacity to 16777216
[    2.092430] xvda: detected capacity change from 0 to 8589934592
[    2.126745] blkfront: xvdc: flush diskcache: enabled; persistent grants: disabled; indirect descriptors: enabled;
[    2.136383]  xvdc: unknown partition table
[    2.146861] Setting capacity to 31992832
[    2.150797] xvdc: detected capacity change from 0 to 16380329984
[    2.158288] blkfront: xvdd: flush diskcache: enabled; persistent grants: disabled; indirect descriptors: enabled;
[    2.165479]  xvdd: unknown partition table
[    2.169498] blkfront: xvdf: barrier or flush: disabled; persistent grants: disabled; indirect descriptors: enabled;
[    2.177559]  xvdf: unknown partition table
[    2.189072] Setting capacity to 31992832
[    2.192313] xvdd: detected capacity change from 0 to 16380329984
[    2.195942] Setting capacity to 41943040
[    2.198619] xvdf: detected capacity change from 0 to 21474836480
[    2.203037] blkfront: xvdb: barrier or flush: disabled; persistent grants: disabled; indirect descriptors: enabled;
[    2.210410]  xvdb: unknown partition table
[    2.213166] Setting capacity to 16777216
[    2.215730] xvdb: detected capacity change from 0 to 8589934592
[    2.229500] vbd vbd-51712: 16 xlvbd_add at /local/domain/0/backend/vbd/5815/51712
[    2.245969] ------------[ cut here ]------------
[    2.246912] kernel BUG at drivers/block/xen-blkfront.c:1711!
[    2.246912] invalid opcode: 0000 [#1] SMP 
[    2.246912] Modules linked in: ata_generic pata_acpi crct10dif_pclmul crct10dif_common crc32_pclmul crc32c_intel ghash_clmulni_intel xen_netfront xen_blkfront(+) aesni_intel lrw ata_piix gf128mul glue_helper ablk_helper cryptd libata serio_raw floppy sunrpc dm_mirror dm_region_hash dm_log dm_mod scsi_transport_iscsi
[    2.246912] CPU: 1 PID: 50 Comm: xenwatch Not tainted 3.10.0-327.18.2.el7.x86_64 #1
[    2.246912] Hardware name: Xen HVM domU, BIOS 4.2.amazon 12/07/2015
[    2.246912] task: ffff8800e9fcb980 ti: ffff8800e98bc000 task.ti: ffff8800e98bc000
[    2.246912] RIP: 0010:[<ffffffffa015584f>]  [<ffffffffa015584f>] blkfront_setup_indirect+0x41f/0x430 [xen_blkfront]
[    2.246912] RSP: 0018:ffff8800e98bfcd0  EFLAGS: 00010283
[    2.246912] RAX: ffff8800353e15c0 RBX: ffff8800e98c52c8 RCX: 0000000000000020
[    2.246912] RDX: ffff8800353e15b0 RSI: ffff8800e98c52b8 RDI: ffff8800353e15d0
[    2.246912] RBP: ffff8800e98bfd20 R08: ffff8800353e15b0 R09: ffff8800eb403c00
[    2.246912] R10: ffffffffa0155532 R11: ffffffffffffffe8 R12: ffff8800e98c4000
[    2.246912] R13: ffff8800e98c52b8 R14: 0000000000000020 R15: ffff8800353e15c0
[    2.246912] FS:  0000000000000000(0000) GS:ffff8800efc20000(0000) knlGS:0000000000000000
[    2.246912] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.246912] CR2: 00007f1b615ef000 CR3: 00000000e2b44000 CR4: 00000000001406e0
[    2.246912] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    2.246912] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[    2.246912] Stack:
[    2.246912]  0000000000000020 0000000000000001 00000020a0157217 00000100e98bfdbc
[    2.246912]  0000000027efa3ef ffff8800e98bfdbc ffff8800e98ce000 ffff8800e98c4000
[    2.246912]  ffff8800e98ce040 0000000000000001 ffff8800e98bfe08 ffffffffa0155d4c
[    2.246912] Call Trace:
[    2.246912]  [<ffffffffa0155d4c>] blkback_changed+0x4ec/0xfc8 [xen_blkfront]
[    2.246912]  [<ffffffff813a6fd0>] ? xenbus_gather+0x170/0x190
[    2.246912]  [<ffffffff816322f5>] ? __slab_free+0x10e/0x277
[    2.246912]  [<ffffffff813a805d>] xenbus_otherend_changed+0xad/0x110
[    2.246912]  [<ffffffff813a7257>] ? xenwatch_thread+0x77/0x180
[    2.246912]  [<ffffffff813a9ba3>] backend_changed+0x13/0x20
[    2.246912]  [<ffffffff813a7246>] xenwatch_thread+0x66/0x180
[    2.246912]  [<ffffffff810a6ae0>] ? wake_up_atomic_t+0x30/0x30
[    2.246912]  [<ffffffff813a71e0>] ? unregister_xenbus_watch+0x1f0/0x1f0
[    2.246912]  [<ffffffff810a5aef>] kthread+0xcf/0xe0
[    2.246912]  [<ffffffff810a5a20>] ? kthread_create_on_node+0x140/0x140
[    2.246912]  [<ffffffff81646118>] ret_from_fork+0x58/0x90
[    2.246912]  [<ffffffff810a5a20>] ? kthread_create_on_node+0x140/0x140
[    2.246912] Code: e1 48 85 c0 75 ce 49 8d 84 24 40 01 00 00 48 89 45 b8 e9 91 fd ff ff 4c 89 ff e8 8d ae 06 e1 e9 f2 fc ff ff 31 c0 e9 2e fe ff ff <0f> 0b e8 9a 57 f2 e0 0f 0b 0f 1f 84 00 00 00 00 00 0f 1f 44 00 
[    2.246912] RIP  [<ffffffffa015584f>] blkfront_setup_indirect+0x41f/0x430 [xen_blkfront]
[    2.246912]  RSP <ffff8800e98bfcd0>
[    2.491574] ---[ end trace 8a9b992812627c71 ]---
[    2.495618] Kernel panic - not syncing: Fatal exception

<the next boot>
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Initializing cgroup subsys cpuacct
[    0.000000] Linux version 3.10.0-327.18.2.el7.x86_64 (builder@kbuilder.dev.centos.org) (gcc version 4.8.3 20140911 (Red Hat 4.8.3-9) (GCC) ) #1 SMP Thu May 12 11:03:55 UTC 2016
[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.10.0-327.18.2.el7.x86_64 root=UUID=ef6ba050-6cdc-416a-9380-c14304d0d206 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 0x0000000000100000-0x00000000efffffff] usable
[    0.000000] BIOS-e820: [mem 0x00000000fc000000-0x00000000ffffffff] reserved
[    0.000000] NX (Execute Disable) protection: active
[    0.000000] SMBIOS 2.4 present.
[    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] AGP: No AGP bridge found
[    0.000000] e820: last_pfn = 0xf0000 max_arch_pfn = 0x400000000
[    0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
[    0.000000] found SMP MP-table at [mem 0x000fbba0-0x000fbbaf] mapped at [ffff8800000fbba0]
[    0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
[    0.000000] init_memory_mapping: [mem 0xefe00000-0xefffffff]
[    0.000000] init_memory_mapping: [mem 0xec000000-0xefdfffff]
[    0.000000] init_memory_mapping: [mem 0x80000000-0xebffffff]
[    0.000000] init_memory_mapping: [mem 0x00100000-0x7fffffff]
[    0.000000] RAMDISK: [mem 0x33055000-0x35822fff]
[    0.000000] ACPI: RSDP 00000000000ea020 00024 (v02    Xen)
[    0.000000] ACPI: XSDT 00000000fc00f5a0 00054 (v01    Xen      HVM 00000000 HVML 00000000)
[    0.000000] ACPI: FACP 00000000fc00f260 000F4 (v04    Xen      HVM 00000000 HVML 00000000)
[    0.000000] ACPI: DSDT 00000000fc0035e0 0BBF6 (v02    Xen      HVM 00000000 INTL 20090123)
[    0.000000] ACPI: FACS 00000000fc0035a0 00040
[    0.000000] ACPI: APIC 00000000fc00f360 000D8 (v02    Xen      HVM 00000000 HVML 00000000)
[    0.000000] ACPI: HPET 00000000fc00f4b0 00038 (v01    Xen      HVM 00000000 HVML 00000000)
[    0.000000] ACPI: WAET 00000000fc00f4f0 00028 (v01    Xen      HVM 00000000 HVML 00000000)
[    0.000000] ACPI: SSDT 00000000fc00f520 00031 (v02    Xen      HVM 00000000 INTL 20090123)
[    0.000000] ACPI: SSDT 00000000fc00f560 00031 (v02    Xen      HVM 00000000 INTL 20090123)
[    0.000000] No NUMA configuration found
[    0.000000] Faking a node at [mem 0x0000000000000000-0x00000000efffffff]
[    0.000000] Initmem setup node 0 [mem 0x00000000-0xefffffff]
[    0.000000]   NODE_DATA [mem 0xeffd8000-0xefffefff]
[    0.000000] Reserving 161MB of memory at 640MB for crashkernel (System RAM: 3839MB)
[    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 0x00100000-0xefffffff]
[    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[0x01] enabled)
[    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, 13 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 0xf0000000-0xfbffffff] 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 31 pages/cpu @ffff8800efc00000 s87232 r8192 d31552 u131072
[    0.000000] Built 1 zonelists in Node order, mobility grouping on.  Total pages: 967560
[    0.000000] Policy zone: DMA32
[    0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.10.0-327.18.2.el7.x86_64 root=UUID=ef6ba050-6cdc-416a-9380-c14304d0d206 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
[    0.000000] AGP: Checking aperture...
[    0.000000] AGP: No AGP bridge found
[    0.000000] Memory: 3646752k/3932160k available (6442k kernel code, 396k absent, 285012k reserved, 4264k data, 1620k init)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=15, Nodes=1
[    0.000000] Hierarchical RCU implementation.
[    0.000000] 	RCU restricting CPUs from NR_CPUS=5120 to nr_cpu_ids=15.
[    0.000000] 	Offload RCU callbacks from all CPUs
[    0.000000] 	Offload RCU callbacks from CPUs: 0-14.
[    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 15728640 bytes of page_cgroup
[    0.000000] please try 'cgroup_disable=memory' option if you don't want memory cgroups
[    0.000000] tsc: Detected 2800.096 MHz processor
[    0.003000] Calibrating delay loop (skipped), value calculated using timer frequency.. 5600.19 BogoMIPS (lpj=2800096)
[    0.009003] pid_max: default: 32768 minimum: 301
[    0.011028] Security Framework initialized
[    0.014005] SELinux:  Initializing.
[    0.016287] Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes)
[    0.021828] Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes)
[    0.025351] Mount-cache hash table entries: 4096
[    0.028172] Initializing cgroup subsys memory
[    0.031009] Initializing cgroup subsys devices
[    0.033003] Initializing cgroup subsys freezer
[    0.036002] Initializing cgroup subsys net_cls
[    0.039002] Initializing cgroup subsys blkio
[    0.041002] Initializing cgroup subsys perf_event
[    0.044003] Initializing cgroup subsys hugetlb
[    0.047064] CPU: Physical Processor ID: 0
[    0.050381] mce: CPU supports 2 MCE banks
[    0.052021] Last level iTLB entries: 4KB 512, 2MB 0, 4MB 0
[    0.052021] Last level dTLB entries: 4KB 512, 2MB 0, 4MB 0
[    0.052021] tlb_flushall_shift: 6
[    0.060216] Freeing SMP alternatives: 28k freed
[    0.065898] ACPI: Core revision 20130517
[    0.071768] ACPI: All ACPI Tables successfully acquired
[    0.075004] ftrace: allocating 24588 entries in 97 pages
[    0.102003] Switched APIC routing to physical flat.
[    0.107153] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=0 pin2=0
[    0.120422] smpboot: CPU0: Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz (fam: 06, model: 3e, stepping: 04)
[    0.126012] installing Xen timer for CPU 0
[    0.129081] cpu 0 spinlock event irq 53
[    0.130038] Performance Events: unsupported p6 CPU model 62 no PMU driver, software events only.
[    0.134288] NMI watchdog: disabled (cpu0): hardware events not enabled
[    0.135059] installing Xen timer for CPU 1
[    0.136054] smpboot: Booting Node   0, Processors  #1cpu 1 spinlock event irq 59
[    0.151032] Brought up 2 CPUs
[    0.152005] smpboot: Total of 2 processors activated (11200.38 BogoMIPS)
[    0.153459] devtmpfs: initialized
[    0.156915] EVM: security.selinux
[    0.159004] EVM: security.ima
[    0.161004] EVM: security.capability
[    0.164034] atomic64 test passed for x86-64 platform with CX8 and with SSE
[    0.167108] NET: Registered protocol family 16
[    0.170098] ACPI: bus type PCI registered
[    0.173005] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
[    0.176214] PCI: Using configuration type 1 for base access
[    0.180079] ACPI: Added _OSI(Module Device)
[    0.181005] ACPI: Added _OSI(Processor Device)
[    0.182005] ACPI: Added _OSI(3.0 _SCP Extensions)
[    0.183004] ACPI: Added _OSI(Processor Aggregator Device)
[    0.188028] ACPI: Interpreter enabled
[    0.189007] ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S1_] (20130517/hwxface-571)
[    0.192005] ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S2_] (20130517/hwxface-571)
[    0.195012] ACPI: (supports S0 S3 S4 S5)
[    0.196004] ACPI: Using IOAPIC for interrupt routing
[    0.197025] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[    0.252185] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[    0.253010] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI]
[    0.254010] acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM
[    0.255068] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.
[    0.256741] acpiphp: Slot [0] registered
[    0.257673] acpiphp: Slot [3] registered
[    0.258244] acpiphp: Slot [4] registered
[    0.259228] acpiphp: Slot [5] registered
[    0.260245] acpiphp: Slot [6] registered
[    0.261304] acpiphp: Slot [7] registered
[    0.262224] acpiphp: Slot [8] registered
[    0.263222] acpiphp: Slot [9] registered
[    0.264235] acpiphp: Slot [10] registered
[    0.265222] acpiphp: Slot [11] registered
[    0.266218] acpiphp: Slot [12] registered
[    0.267224] acpiphp: Slot [13] registered
[    0.268232] acpiphp: Slot [14] registered
[    0.269234] acpiphp: Slot [15] registered
[    0.270229] acpiphp: Slot [16] registered
[    0.271230] acpiphp: Slot [17] registered
[    0.272227] acpiphp: Slot [18] registered
[    0.273226] acpiphp: Slot [19] registered
[    0.274236] acpiphp: Slot [20] registered
[    0.275227] acpiphp: Slot [21] registered
[    0.276237] acpiphp: Slot [22] registered
[    0.277234] acpiphp: Slot [23] registered
[    0.278231] acpiphp: Slot [24] registered
[    0.279228] acpiphp: Slot [25] registered
[    0.280230] acpiphp: Slot [26] registered
[    0.281233] acpiphp: Slot [27] registered
[    0.282239] acpiphp: Slot [28] registered
[    0.283234] acpiphp: Slot [29] registered
[    0.284238] acpiphp: Slot [30] registered
[    0.285246] acpiphp: Slot [31] registered
[    0.286230] PCI host bridge to bus 0000:00
[    0.287007] pci_bus 0000:00: root bus resource [bus 00-ff]
[    0.288005] pci_bus 0000:00: root bus resource [io  0x0000-0x0cf7]
[    0.289005] pci_bus 0000:00: root bus resource [io  0x0d00-0xffff]
[    0.290005] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff]
[    0.291005] pci_bus 0000:00: root bus resource [mem 0xf0000000-0xfbffffff]
[    0.295938] pci 0000:00:01.1: legacy IDE quirk: reg 0x10: [io  0x01f0-0x01f7]
[    0.296005] pci 0000:00:01.1: legacy IDE quirk: reg 0x14: [io  0x03f6]
[    0.297004] pci 0000:00:01.1: legacy IDE quirk: reg 0x18: [io  0x0170-0x0177]
[    0.298004] pci 0000:00:01.1: legacy IDE quirk: reg 0x1c: [io  0x0376]
[    0.299490] * Found PM-Timer Bug on the chipset. Due to workarounds for a bug,
[    0.299490] * this clock source is slow. Consider trying other clock sources
[    0.300874] pci 0000:00:01.3: quirk: [io  0xb000-0xb03f] claimed by PIIX4 ACPI
[    0.305428] ACPI: PCI Interrupt Link [LNKA] (IRQs *5 10 11)
[    0.308162] ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
[    0.311161] ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
[    0.314159] ACPI: PCI Interrupt Link [LNKD] (IRQs *5 10 11)
[    0.330919] ACPI: Enabled 2 GPEs in block 00 to 0F
[    0.331074] xen:balloon: Initialising balloon driver
[    0.336023] xen_balloon: Initialising balloon driver
[    0.339069] vgaarb: device added: PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none
[    0.343004] vgaarb: loaded
[    0.345004] vgaarb: bridge control possible 0000:00:02.0
[    0.348107] SCSI subsystem initialized
[    0.350032] ACPI: bus type USB registered
[    0.353017] usbcore: registered new interface driver usbfs
[    0.355014] usbcore: registered new interface driver hub
[    0.358031] usbcore: registered new device driver usb
[    0.361051] PCI: Using ACPI for IRQ routing
[    0.362459] NetLabel: Initializing
[    0.363004] NetLabel:  domain hash size = 128
[    0.364003] NetLabel:  protocols = UNLABELED CIPSOv4
[    0.365014] NetLabel:  unlabeled traffic allowed by default
[    0.366036] HPET: 3 timers in total, 0 timers will be used for per-cpu timer
[    0.367015] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0
[    0.369938] hpet0: 3 comparators, 64-bit 62.500000 MHz counter
[    0.371019] Switching to clocksource xen
[    0.376227] pnp: PnP ACPI init
[    0.378335] ACPI: bus type PNP registered
[    0.380839] system 00:00: [mem 0x00000000-0x0009ffff] could not be reserved
[    0.384516] system 00:02: [io  0x08a0-0x08a3] has been reserved
[    0.387746] system 00:02: [io  0x0cc0-0x0ccf] has been reserved
[    0.391006] system 00:02: [io  0x04d0-0x04d1] has been reserved
[    0.394373] system 00:0a: [io  0x10c0-0x1141] has been reserved
[    0.397574] system 00:0a: [io  0xb044-0xb047] has been reserved
[    0.415505] pnp: PnP ACPI: found 11 devices
[    0.418026] ACPI: bus type PNP unregistered
[    0.428104] NET: Registered protocol family 2
[    0.430856] TCP established hash table entries: 32768 (order: 6, 262144 bytes)
[    0.435233] TCP bind hash table entries: 32768 (order: 7, 524288 bytes)
[    0.438849] TCP: Hash tables configured (established 32768 bind 32768)
[    0.442268] TCP: reno registered
[    0.444442] UDP hash table entries: 2048 (order: 4, 65536 bytes)
[    0.447717] UDP-Lite hash table entries: 2048 (order: 4, 65536 bytes)
[    0.451161] NET: Registered protocol family 1
[    0.453730] pci 0000:00:00.0: Limiting direct PCI/PCI transfers
[    0.456956] pci 0000:00:01.0: PIIX3: Enabling Passive Release
[    0.460141] pci 0000:00:01.0: Activating ISA DMA hang workarounds
[    0.463598] Unpacking initramfs...
[    0.966291] Freeing initrd memory: 40760k freed
[    0.978226] RAPL PMU detected, API unit is 2^-32 Joules, 3 fixed counters 163840 ms ovfl timer
[    0.983132] hw unit of domain pp0-core 2^-16 Joules
[    0.985912] hw unit of domain package 2^-16 Joules
[    0.988690] hw unit of domain dram 2^-16 Joules
[    0.991576] microcode: CPU0 sig=0x306e4, pf=0x1, revision=0x428
[    0.994738] microcode: CPU1 sig=0x306e4, pf=0x1, revision=0x428
[    0.998922] microcode: Microcode Update Driver: v2.00 <tigran@aivazian.fsnet.co.uk>, Peter Oruba
[    1.003854] sha1_ssse3: Using AVX optimized SHA-1 implementation
[    1.007180] sha256_ssse3: Using AVX optimized SHA-256 implementation
[    1.010891] futex hash table entries: 4096 (order: 6, 262144 bytes)
[    1.014273] Initialise system trusted keyring
[    1.017090] audit: initializing netlink socket (disabled)
[    1.020065] type=2000 audit(1464346423.142:1): initialized
[    1.040767] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[    1.044947] zpool: loaded
[    1.046868] zbud: loaded
[    1.048919] VFS: Disk quotas dquot_6.5.2
[    1.051349] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[    1.054912] msgmni has been set to 7202
[    1.057427] Key type big_key registered
[    1.060827] NET: Registered protocol family 38
[    1.063426] Key type asymmetric registered
[    1.065870] Asymmetric key parser 'x509' registered
[    1.068689] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251)
[    1.072983] io scheduler noop registered
[    1.075384] io scheduler deadline registered (default)
[    1.078303] io scheduler cfq registered
[    1.080772] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[    1.084008] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
[    1.087775] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[    1.092090] ACPI: Power Button [PWRF]
[    1.094425] input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
[    1.098753] ACPI: Sleep Button [SLPF]
[    1.101242] GHES: HEST is not enabled!
[    1.104024] xen:grant_table: Grant tables using version 1 layout
[    1.107312] Grant table initialized
[    1.109598] Cannot get hvm parameter CONSOLE_EVTCHN (18): -22!
[    1.112805] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    1.141849] 00:09: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[    1.145696] Non-volatile memory driver v1.3
[    1.148217] Linux agpgart interface v0.103
[    1.150808] crash memory driver: version 1.1
[    1.153349] rdac: device handler registered
[    1.155905] hp_sw: device handler registered
[    1.158586] emc: device handler registered
[    1.161020] alua: device handler registered
[    1.163516] libphy: Fixed MDIO Bus: probed
[    1.166028] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    1.169454] ehci-pci: EHCI PCI platform driver
[    1.172040] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    1.175362] ohci-pci: OHCI PCI platform driver
[    1.178038] uhci_hcd: USB Universal Host Controller Interface driver
[    1.181485] usbcore: registered new interface driver usbserial
[    1.184642] usbcore: registered new interface driver usbserial_generic
[    1.188123] usbserial: USB Serial support registered for generic
[    1.191398] i8042: PNP: PS/2 Controller [PNP0303:PS2K,PNP0f13:PS2M] at 0x60,0x64 irq 1,12
[    1.197341] serio: i8042 KBD port at 0x60,0x64 irq 1
[    1.200173] serio: i8042 AUX port at 0x60,0x64 irq 12
[    1.203199] mousedev: PS/2 mouse device common for all mice
[    1.206722] rtc_cmos 00:04: rtc core: registered rtc_cmos as rtc0
[    1.210144] rtc_cmos 00:04: alarms up to one day, 114 bytes nvram, hpet irqs
[    1.214010] cpuidle: using governor menu
[    1.216658] hidraw: raw HID events driver (C) Jiri Kosina
[    1.220071] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input2
[    1.220143] usbcore: registered new interface driver usbhid
[    1.220143] usbhid: USB HID core driver
[    1.220193] drop_monitor: Initializing network drop monitor service
[    1.220263] TCP: cubic registered
[    1.220266] Initializing XFRM netlink socket
[    1.220336] NET: Registered protocol family 10
[    1.220536] NET: Registered protocol family 17
[    1.220725] Loading compiled-in X.509 certificates
[    1.220746] Loaded X.509 cert 'CentOS Linux kpatch signing key: ea0413152cde1d98ebdca3fe6f0230904c9ef717'
[    1.220779] Loaded X.509 cert 'CentOS Linux Driver update signing key: 7f421ee0ab69461574bb358861dbe77762a4201b'
[    1.221239] Loaded X.509 cert 'CentOS Linux kernel signing key: eb2791de1abea5f95aa5bcb891e1332bed298e5e'
[    1.221254] registered taskstats version 1
[    1.223042] Key type trusted registered
[    1.224596] Key type encrypted registered
[    1.226463] IMA: No TPM chip found, activating TPM-bypass!
[    1.226836] xenbus_probe_frontend: Device with no driver: device/vfb/0
[    1.226836] xenbus_probe_frontend: Device with no driver: device/vbd/768
[    1.226837] xenbus_probe_frontend: Device with no driver: device/vbd/51744
[    1.226838] xenbus_probe_frontend: Device with no driver: device/vbd/51760
[    1.226838] xenbus_probe_frontend: Device with no driver: device/vbd/51792
[    1.226839] xenbus_probe_frontend: Device with no driver: device/vbd/51728
[    1.226840] xenbus_probe_frontend: Device with no driver: device/vbd/51712
[    1.226840] xenbus_probe_frontend: Device with no driver: device/vif/0
[    1.226841] xenbus_probe_frontend: Device with no driver: device/vif/1
[    1.350798] rtc_cmos 00:04: setting system clock to 2016-05-27 10:53:43 UTC (1464346423)
[    1.357634] Freeing unused kernel memory: 1620k freed
[    1.365977] systemd[1]: systemd 219 running in system mode. (+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ -LZ4 -SECCOMP +BLKID +ELFUTILS +KMOD +IDN)
[    1.375009] systemd[1]: Detected virtualization xen.
[    1.377881] systemd[1]: Detected architecture x86-64.
[    1.380721] systemd[1]: Running in initial RAM disk.

Welcome to ^[[0;34mCentOS Linux 7 (Core) dracut-033-360.el7_2 (Initramfs)^[[0m!

[    1.386434] systemd[1]: No hostname configured.
[    1.389066] systemd[1]: Set hostname to <localhost>.
[    1.391873] systemd[1]: Initializing machine ID from random generator.
[    1.424527] systemd[1]: Started Dispatch Password Requests to Console Directory Watch.
[    1.429169] systemd[1]: Starting Dispatch Password Requests to Console Directory Watch.
[^[[32m  OK  ^[[0m] Reached target Swap.
[    1.435744] systemd[1]: Reached target Swap.
[    1.438338] systemd[1]: Starting Swap.
[^[[32m  OK  ^[[0m] Reached target Local File Systems.
[    1.443029] systemd[1]: Reached target Local File Systems.
[    1.446048] systemd[1]: Starting Local File Systems.
[^[[32m  OK  ^[[0m] Reached target Encrypted Volumes.
[    1.451131] systemd[1]: Reached target Encrypted Volumes.
[    1.454159] systemd[1]: Starting Encrypted Volumes.
[^[[32m  OK  ^[[0m] Created slice -.slice.
[    1.459141] systemd[1]: Created slice -.slice.
[    1.461756] systemd[1]: Starting -.slice.
[^[[32m  OK  ^[[0m] Listening on Journal Socket.
[    1.466487] systemd[1]: Listening on Journal Socket.
[    1.469370] systemd[1]: Starting Journal Socket.
[^[[32m  OK  ^[[0m] Listening on udev Kernel Socket.
[    1.474297] systemd[1]: Listening on udev Kernel Socket.
[    1.477260] systemd[1]: Starting udev Kernel Socket.
[^[[32m  OK  ^[[0m] Created slice System Slice.
[    1.482258] systemd[1]: Created slice System Slice.
[    1.485035] systemd[1]: Starting System Slice.
[    1.487801] systemd[1]: Started Load Kernel Modules.
[^[[32m  OK  ^[[0m] Reached target Slices.
[    1.492718] systemd[1]: Reached target Slices.
[    1.495414] systemd[1]: Starting Slices.
[    1.498409] systemd[1]: Starting Create list of required static device nodes for the current kernel...
         Starting Create list of required st... nodes for the current kernel...
[    1.507032] systemd[1]: Starting Apply Kernel Variables...
         Starting Apply Kernel Variables...
[^[[32m  OK  ^[[0m] Listening on udev Control Socket.
[    1.514852] systemd[1]: Listening on udev Control Socket.
[    1.518011] systemd[1]: Starting udev Control Socket.
[    1.521363] systemd[1]: Starting Journal Service...
         Starting Journal Service...
[    1.527534] systemd[1]: Started dracut ask for additional cmdline parameters.
[    1.533432] systemd[1]: Starting dracut cmdline hook...
         Starting dracut cmdline hook...
[^[[32m  OK  ^[[0m] Reached target Timers.
[    1.542489] systemd[1]: Reached target Timers.
[    1.546147] systemd[1]: Starting Timers.
[^[[32m  OK  ^[[0m] Reached target Paths.
[    1.552144] systemd[1]: Reached target Paths.
[    1.555784] systemd[1]: Starting Paths.
[^[[32m  OK  ^[[0m] Started Journal Service.
[    1.562228] systemd[1]: Started Journal Service.
[^[[32m  OK  ^[[0m] Started Create list of required sta...ce nodes for the current kernel.
[^[[32m  OK  ^[[0m] Started Apply Kernel Variables.
         Starting Create Static Device Nodes in /dev...
[^[[32m  OK  ^[[0m] Started Create Static Device Nodes in /dev.
[^[[32m  OK  ^[[0m] Started dracut cmdline hook.
         Starting dracut pre-udev hook...
         Starting Open-iSCSI...
[    1.661004] Loading iSCSI transport class v2.0-870.
[^[[32m  OK  ^[[0m] Started Open-iSCSI.
[    1.669267] device-mapper: uevent: version 1.0.3
[    1.672073] device-mapper: ioctl: 4.33.0-ioctl (2015-8-18) initialised: dm-devel@redhat.com
[    1.688150] RPC: Registered named UNIX socket transport module.
[    1.691377] RPC: Registered udp transport module.
[    1.694105] RPC: Registered tcp transport module.
[    1.696863] RPC: Registered tcp NFSv4.1 backchannel transport module.
[^[[32m  OK  ^[[0m] Started dracut pre-udev hook.
         Starting udev Kernel Device Manager...
[^[[32m  OK  ^[[0m] Started udev Kernel Device Manager.
         Starting dracut pre-trigger hook...
[^[[32m  OK  ^[[0m] Started dracut pre-trigger hook.
         Starting udev Coldplug all Devices...
[^[[32m  OK  ^[[0m] Started udev Coldplug all Devices.
         Starting dracut initqueue hook...
[^[[32m  OK  ^[[0m] Reached target System Initialization.
[^[[32m  OK  ^[[0m] Listening on Open-iSCSI iscsiuio Socket.
[^[[32m  OK  ^[[0m] Reached target Sockets.
[^[[32m  OK  ^[[0m] Reached target Basic System.
         Mounting Configuration File System...
[^[[32m  OK  ^[[0m] Mounted Configuration File System.
[    1.899272] FDC 0 is a S82078B
[    1.925268] scsi host0: ata_piix
[    1.929104] scsi host1: ata_piix
[    1.932072] ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f6 bmdma 0xc100 irq 14
[    1.936666] ata2: PATA max MWDMA2 cmd 0x170 ctl 0x376 bmdma 0xc108 irq 15
[    1.950859] xen_netfront: Initialising Xen virtual ethernet driver
[    1.960747] AES CTR mode by8 optimization enabled
[    1.979104] tsc: Refined TSC clocksource calibration: 2800.002 MHz
[    1.985126] alg: No test for __gcm-aes-aesni (__driver-gcm-aes-aesni)
[    2.003698] alg: No test for crc32 (crc32-pclmul)
[    2.034496] blkfront: xvda: barrier or flush: disabled; persistent grants: disabled; indirect descriptors: enabled;
[    2.056297]  xvda: xvda1
[    2.081956] blkfront: xvdc: flush diskcache: enabled; persistent grants: disabled; indirect descriptors: enabled;
[    2.109715]  xvdc: unknown partition table
[    2.114869] Setting capacity to 16777216
[    2.118607] xvda: detected capacity change from 0 to 8589934592
[    2.128223] blkfront: xvdd: flush diskcache: enabled; persistent grants: disabled; indirect descriptors: enabled;
[    2.140594]  xvdd: unknown partition table
[    2.146408] Setting capacity to 31992832
[    2.150112] xvdc: detected capacity change from 0 to 16380329984
[    2.163469] blkfront: xvdf: barrier or flush: disabled; persistent grants: disabled; indirect descriptors: enabled;
[    2.171933]  xvdf: unknown partition table
[    2.175566] blkfront: xvdb: barrier or flush: disabled; persistent grants: disabled; indirect descriptors: enabled;
[    2.182604]  xvdb: unknown partition table
[    2.193739] Setting capacity to 31992832
[    2.196905] xvdd: detected capacity change from 0 to 16380329984
[    2.201119] vbd vbd-51712: 16 xlvbd_add at /local/domain/0/backend/vbd/5816/51712
[    2.209704] input: ImExPS/2 Generic Explorer Mouse as /devices/platform/i8042/serio1/input/input3
[    2.219009] Setting capacity to 41943040
[    2.222069] xvdf: detected capacity change from 0 to 21474836480
[    2.225541] Setting capacity to 16777216
[    2.228035] xvdb: detected capacity change from 0 to 8589934592
[^[[32m  OK  ^[[0m] Found device /dev/disk/by-uuid/ef6ba050-6cdc-416a-9380-c14304d0d206.
         Starting File System Check on /dev/...0-6cdc-416a-9380-c14304d0d206...
[^[[32m  OK  ^[[0m] Started File System Check on /dev/d...050-6cdc-416a-9380-c14304d0d206.
[^[[32m  OK  ^[[0m] Started dracut initqueue hook.
         Starting dracut pre-mount hook...
[^[[32m  OK  ^[[0m] Reached target Remote File Systems (Pre).
[^[[32m  OK  ^[[0m] Reached target Remote File Systems.
[^[[32m  OK  ^[[0m] Started dracut pre-mount hook.
         Mounting /sysroot...
[    2.496523] SGI XFS with ACLs, security attributes, no debug enabled
[    2.502082] XFS (xvda1): Mounting V4 Filesystem
[    2.658088] XFS (xvda1): Ending clean mount
[^[[32m  OK  ^[[0m] Mounted /sysroot.
[^[[32m  OK  ^[[0m] Reached target Initrd Root File System.
         Starting Reload Configuration from the Real Root...
[^[[32m  OK  ^[[0m] Started Reload Configuration from the Real Root.
[^[[32m  OK  ^[[0m] Reached target Initrd File Systems.
[^[[32m  OK  ^[[0m] Reached target Initrd Default Target.
         Starting dracut pre-pivot and cleanup hook...
[^[[32m  OK  ^[[0m] Started dracut pre-pivot and cleanup hook.
         Starting Cleaning Up and Shutting Down Daemons...
[^[[32m  OK  ^[[0m] Stopped target Timers.
[^[[32m  OK  ^[[0m] Stopped Cleaning Up and Shutting Down Daemons.
[^[[32m  OK  ^[[0m] Stopped dracut pre-pivot and cleanup hook.
         Stopping dracut pre-pivot and cleanup hook...
[^[[32m  OK  ^[[0m] Stopped dracut pre-mount hook.
         Stopping dracut pre-mount hook...
[^[[32m  OK  ^[[0m] Stopped target Remote File Systems.
[^[[32m  OK  ^[[0m] Stopped target Remote File Systems (Pre).
[^[[32m  OK  ^[[0m] Stopped dracut initqueue hook.
         Stopping dracut initqueue hook...
         Stopping Open-iSCSI...
[^[[32m  OK  ^[[0m] Stopped target Initrd Default Target.
[^[[32m  OK  ^[[0m] Stopped target Basic System.
[^[[32m  OK  ^[[0m] Stopped target Sockets.
[^[[32m  OK  ^[[0m] Closed Open-iSCSI iscsiuio Socket.
[^[[32m  OK  ^[[0m] Stopped target Slices.
[^[[32m  OK  ^[[0m] Stopped target Paths.
[^[[32m  OK  ^[[0m] Stopped target System Initialization.
[^[[32m  OK  ^[[0m] Stopped Apply Kernel Variables.
         Stopping Apply Kernel Variables...
[^[[32m  OK  ^[[0m] Stopped target Local File Systems.
[^[[32m  OK  ^[[0m] Stopped udev Coldplug all Devices.
         Stopping udev Coldplug all Devices...
[^[[32m  OK  ^[[0m] Stopped dracut pre-trigger hook.
         Stopping dracut pre-trigger hook...
         Stopping udev Kernel Device Manager...
[^[[32m  OK  ^[[0m] Stopped target Encrypted Volumes.
[^[[32m  OK  ^[[0m] Stopped target Swap.
[^[[32m  OK  ^[[0m] Stopped Open-iSCSI.
[^[[32m  OK  ^[[0m] Stopped udev Kernel Device Manager.
[^[[32m  OK  ^[[0m] Stopped dracut pre-udev hook.
         Stopping dracut pre-udev hook...
[^[[32m  OK  ^[[0m] Stopped dracut cmdline hook.
         Stopping dracut cmdline hook...
[^[[32m  OK  ^[[0m] Stopped Create Static Device Nodes in /dev.
         Stopping Create Static Device Nodes in /dev...
[^[[32m  OK  ^[[0m] Stopped Create list of required sta...ce nodes for the current kernel.
         Stopping Create list of required st... nodes for the current kernel...
[^[[32m  OK  ^[[0m] Closed udev Control Socket.
[^[[32m  OK  ^[[0m] Closed udev Kernel Socket.
         Starting Cleanup udevd DB...
[^[[32m  OK  ^[[0m] Started Cleanup udevd DB.
[^[[32m  OK  ^[[0m] Reached target Switch Root.
         Starting Switch Root...
[    3.047212] systemd-journald[128]: Received SIGTERM from PID 1 (systemd).
[    3.334849] type=1404 audit(1464346425.607:2): enforcing=1 old_enforcing=0 auid=4294967295 ses=4294967295
[    3.533428] type=1403 audit(1464346425.806:3): policy loaded auid=4294967295 ses=4294967295
[    3.543297] systemd[1]: Successfully loaded SELinux policy in 257.935ms.
[    3.770731] ip_tables: (C) 2000-2006 Netfilter Core Team
[    3.773826] systemd[1]: Inserted module 'ip_tables'
[    3.793128] systemd[1]: Relabelled /dev and /run in 12.801ms.

Welcome to ^[[0;31mCentOS Linux 7 (Core)^[[0m!

[^[[32m  OK  ^[[0m] Stopped Switch Root.
[^[[32m  OK  ^[[0m] Created slice system-serial\x2dgetty.slice.
[^[[32m  OK  ^[[0m] Listening on udev Kernel Socket.
[^[[32m  OK  ^[[0m] Stopped File System Check on Root Device.
         Stopping File System Check on Root Device...
[^[[32m  OK  ^[[0m] Listening on LVM2 metadata daemon socket.
         Mounting Huge Pages File System...
         Mounting POSIX Message Queue File System...
[^[[32m  OK  ^[[0m] Listening on udev Control Socket.
[^[[32m  OK  ^[[0m] Listening on /dev/initctl Compatibility Named Pipe.
[^[[32m  OK  ^[[0m] Reached target Encrypted Volumes.
         Mounting NFSD configuration filesystem...
[^[[32m  OK  ^[[0m] Set up automount Arbitrary Executab...ats File System Automount Point.
         Mounting Debug File System...
[^[[32m  OK  ^[[0m] Created slice system-getty.slice.
[^[[32m  OK  ^[[0m] Listening on Device-mapper event daemon FIFOs.
         Starting Monitoring of LVM2 mirrors... dmeventd or progress polling...
[^[[32m  OK  ^[[0m] Listening on LVM2 poll daemon socket.
[^[[32m  OK  ^[[0m] Created slice User and Session Slice.
[^[[32m  OK  ^[[0m] Reached target Slices.
[^[[32m  OK  ^[[0m] Stopped Flush Journal to Persistent Storage.
[^[[32m  OK  ^[[0m] Stopped Journal Service.
         Starting Journal Service...
[^[[32m  OK  ^[[0m] Reached target Swap.[    4.885478] type=1400 audit(1464346427.157:4): avc:  denied  { read } for  pid=537 comm="systemd-journal" name="ld.so.cache" dev="xvda1" ino=714 scontext=system_u:system_r:syslogd_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=file

[^[[32m  OK  ^[[0m] Stopped target Switch Root.
[^[[32m  OK  ^[[0m] Stopped target Initrd File Systems.
         Starting Create list of required st... nodes for the current kernel...
[^[[32m  OK  ^[[0m] Stopped target Initrd Root File System.
[^[[32m  OK  ^[[0m] Listening on Delayed Shutdown Socket.
         Starting Load Kernel Modules...
         Starting Remount Root and Kernel File Systems...
         Starting Setup Virtual Console...
[^[[32m  OK  ^[[0m] Mounted Debug File System.
[^[[32m  OK  ^[[0m] Mounted POSIX Message Queue File System.
[^[[32m  OK  ^[[0m] Mounted Huge Pages File System.
[^[[32m  OK  ^[[0m] Started Create list of required sta...ce nodes for the current kernel.
[^[[32m  OK  ^[[0m] Started Remount Root and Kernel File Systems.
         Starting udev Coldplug all Devices...
         Starting Load/Save Random Seed...
         Starting Configure read-only root support...
         Starting Create Static Device Nodes in /dev...
[^[[32m  OK  ^[[0m] Started LVM2 metadata daemon.
         Starting LVM2 metadata daemon...
[^[[32m  OK  ^[[0m] Started Load/Save Random Seed.
[    5.010608] Bridge firewalling registered
[^[[32m  OK  ^[[0m] Started Journal Service.
         Starting Flush Journal to Persistent Storage...
[^[[1;31mFAILED^[[0m] Failed to start Load Kernel Modules.
See 'systemctl status systemd-modules-load.service' for details.
         Starting Apply Kernel Variables...
[^[[32m  OK  ^[[0m] Started udev Coldplug all Devices.
[    5.093183] Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
[    5.097849] type=1400 audit(1464346427.370:5): avc:  denied  { read } for  pid=561 comm="systemd-sysctl" name="ld.so.cache" dev="xvda1" ino=714 scontext=system_u:system_r:systemd_sysctl_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=file
[^[[32m  OK  ^[[0m] Mounted NFSD configuration filesystem.
[    5.118805] systemd-journald[537]: Received request to flush runtime journal from PID 1
[^[[32m  OK  ^[[0m] Started Flush Journal to Persistent Storage.
[    5.199979] type=1400 audit(1464346427.472:6): avc:  denied  { read } for  pid=568 comm="loadkeys" name="ld.so.cache" dev="xvda1" ino=714 scontext=system_u:system_r:loadkeys_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=file
[^[[32m  OK  ^[[0m] Started Configure read-only root support.
[^[[32m  OK  ^[[0m] Started Apply Kernel Variables.
[    5.223884] type=1400 audit(1464346427.496:7): avc:  denied  { read } for  pid=573 comm="sh" name="ld.so.cache" dev="xvda1" ino=714 scontext=system_u:system_r:loadkeys_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=file
[    5.234994] type=1400 audit(1464346427.507:8): avc:  denied  { read } for  pid=573 comm="gzip" name="ld.so.cache" dev="xvda1" ino=714 scontext=system_u:system_r:loadkeys_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=file
[^[[32m  OK  ^[[0m] Started Setup Virtual Console.
[^[[32m  OK  ^[[0m] Started Create Static Device Nodes in /dev.
[^[[32m  OK  ^[[0m] Reached target Local File Systems (Pre).
         Starting udev Kernel Device Manager...
[^[[32m  OK  ^[[0m] Started Monitoring of LVM2 mirrors,...ng dmeventd or progress polling.
[^[[32m  OK  ^[[0m] Started udev Kernel Device Manager.
[    5.658924] piix4_smbus 0000:00:01.3: SMBus base address uninitialized - upgrade BIOS or use force_addr=0xaddr
[    5.666086] [drm] Initialized drm 1.1.0 20060810
[    5.688317] input: PC Speaker as /devices/platform/pcspkr/input/input4
[^[[32m  OK  ^[[0m] Found device /dev/ttyS0.
[    5.706360] [TTM] Zone  kernel: Available graphics memory: 1844580 kiB
[    5.711218] [TTM] Initializing pool allocator
[    5.715073] [TTM] Initializing DMA pool allocator
[    5.718662] [drm] fb mappable at 0xF0000000
[    5.721285] [drm] vram aper at 0xF0000000
[    5.724333] [drm] size 33554432
[    5.727158] [drm] fb depth is 24
[    5.729851] [drm]    pitch is 3072
[    5.732608] fbcon: cirrusdrmfb (fb0) is primary device
[    5.806791] Console: switching to colour frame buffer device 128x48
[    5.833003] ppdev: user-space parallel port driver
[    5.854208] cirrus 0000:00:02.0: fb0: cirrusdrmfb frame buffer device
[    5.854209] cirrus 0000:00:02.0: registered panic notifier
[    5.854213] [drm] Initialized cirrus 1.0.0 20110418 for 0000:00:02.0 on minor 0
[^[[32m  OK  ^[[0m] Found device /dev/disk/by-label/vz.
[    5.929886] EXT4-fs (xvdf): mounted filesystem with ordered data mode. Opts: (null)
         Mounting /vz...
[^[[32m  OK  ^[[0m] Mounted /vz.
[^[[32m  OK  ^[[0m] Reached target Local File Systems.
         Starting Preprocess NFS configuration...
         Starting Import network configuration from initramfs...
         Starting Relabel all filesystems, if necessary...
[^[[32m  OK  ^[[0m] Started Preprocess NFS configuration.
[^[[32m  OK  ^[[0m] Started Import network configuration from initramfs.
         Starting Create Volatile Files and Directories...
[    6.067749] type=1404 audit(1464346428.340:9): enforcing=0 old_enforcing=1 auid=4294967295 ses=4294967295

*** Warning -- SELinux targeted policy relabel is required.
*** Relabeling could take a very long time, depending on file
*** system size and speed of hard drives.
[^[[32m  OK  ^[[0m] Started Create Volatile Files and Directories.
         Starting Security Auditing Service...
[    6.162168] type=1400 audit(1464346428.435:10): avc:  denied  { read } for  pid=661 comm="auditd" name="ld.so.cache" dev="xvda1" ino=714 scontext=system_u:system_r:auditd_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=file
[    6.170919] type=1400 audit(1464346428.443:11): avc:  denied  { open } for  pid=661 comm="auditd" path="/etc/ld.so.cache" dev="xvda1" ino=714 scontext=system_u:system_r:auditd_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=file
[    6.180077] type=1400 audit(1464346428.453:12): avc:  denied  { getattr } for  pid=661 comm="auditd" path="/etc/ld.so.cache" dev="xvda1" ino=714 scontext=system_u:system_r:auditd_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=file
[    6.236211] type=1400 audit(1464346428.509:13): avc:  denied  { append } for  pid=661 comm="auditd" name="audit.log" dev="xvda1" ino=1108136 scontext=system_u:system_r:auditd_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=file
[    6.245681] type=1400 audit(1464346428.518:14): avc:  denied  { setattr } for  pid=661 comm="auditd" name="audit.log" dev="xvda1" ino=1108136 scontext=system_u:system_r:auditd_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=file
[    6.258316] type=1400 audit(1464346428.531:15): avc:  denied  { read } for  pid=790 comm="audispd" name="ld.so.cache" dev="xvda1" ino=714 scontext=system_u:system_r:audisp_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=file
[    6.266493] type=1400 audit(1464346428.539:16): avc:  denied  { open } for  pid=790 comm="audispd" path="/etc/ld.so.cache" dev="xvda1" ino=714 scontext=system_u:system_r:audisp_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=file
[    6.275771] type=1400 audit(1464346428.548:17): avc:  denied  { getattr } for  pid=790 comm="audispd" path="/etc/ld.so.cache" dev="xvda1" ino=714 scontext=system_u:system_r:audisp_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=file
[    6.290137] type=1305 audit(1464346428.563:18): audit_pid=661 old=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:auditd_t:s0 res=1
[^[[32m  OK  ^[[0m] Started Security Auditing Service.
         Starting Update UTMP about System Boot/Shutdown...
[^[[32m  OK  ^[[0m] Started Update UTMP about System Boot/Shutdown.
Warning: Skipping the following R/O filesystems:
/sys/fs/cgroup

1.2%
2.3%
3.5%
4.6%
5.8%
6.9%
8.1%
9.2%
10.4%
11.5%
12.7%
13.9%
15.0%
16.2%
17.3%
18.5%
19.6%
20.8%
21.9%
23.1%
24.2%
25.4%
26.5%
27.7%
28.9%
30.0%
31.2%
32.3%
33.5%
34.6%
35.8%
36.9%
38.1%
39.2%
40.4%
41.6%
42.7%
43.9%
45.0%
46.2%
47.3%
48.5%
49.6%
50.8%
51.9%
53.1%
54.3%
55.4%
56.6%
57.7%
58.9%
60.0%
61.2%
62.3%
63.5%
64.6%
65.8%
66.9%
68.1%
69.3%
70.4%
71.6%
72.7%
73.9%
75.0%
76.2%
77.3%
78.5%
79.6%
80.8%
82.0%
83.1%
84.3%
85.4%
86.6%
87.7%
88.9%
90.0%
91.2%
92.3%
93.5%
94.7%
95.8%
97.0%
98.1%
99.3%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
Error getting authority: Error initializing authority: Could not connect: No such file or directory (g-io-error-quark, 1)
[   47.246832] systemd-shutdown[1]: Sending SIGTERM to remaining processes...
[   47.259902] systemd-journald[537]: Received SIGTERM from PID 1 (systemd-shutdow).
[   47.274164] type=1305 audit(1464346469.547:24): audit_pid=0 old=661 auid=4294967295 ses=4294967295 subj=system_u:system_r:auditd_t:s0 res=1
[   47.289374] systemd-shutdown[1]: Sending SIGKILL to remaining processes...
[   47.296152] systemd-shutdown[1]: Unmounting file systems.
[   47.392061] EXT4-fs (xvdf): re-mounted. Opts: (null)
[   47.395839] systemd-shutdown[1]: Unmounting /vz.
[   47.403637] systemd-shutdown[1]: Unmounting /var/lib/nfs/rpc_pipefs.
[   48.051592] systemd-shutdown[1]: All filesystems unmounted.
[   48.054796] systemd-shutdown[1]: Deactivating swaps.
[   48.057887] systemd-shutdown[1]: All swaps deactivated.
[   48.061214] systemd-shutdown[1]: Detaching loop devices.
[   48.066081] systemd-shutdown[1]: All loop devices detached.
[   48.069526] systemd-shutdown[1]: Detaching DM devices.
[   48.072792] systemd-shutdown[1]: All DM devices detached.
[   48.086238] systemd-shutdown[1]: Rebooting.
[   48.229667] xenbus: xenbus_dev_shutdown: device/vbd/51712: Closing != Connected, skipping
[   48.255875] xenbus: xenbus_dev_shutdown: device/vfb/0: Initialising != Connected, skipping
[   48.262294] Restarting system.
[   48.265087] reboot: machine restart


[-- Attachment #3: Type: text/plain, Size: 126 bytes --]

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^ permalink raw reply	[flat|nested] 15+ messages in thread

end of thread, other threads:[~2016-08-11  7:45 UTC | newest]

Thread overview: 15+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-06-06  8:24 [BUG] kernel BUG at drivers/block/xen-blkfront.c:1711 Evgenii Shatokhin
2016-06-06  8:42 ` Dario Faggioli
2016-07-11  8:50   ` Evgenii Shatokhin
2016-07-11 10:37     ` George Dunlap
2016-07-11 14:34       ` Evgenii Shatokhin
2016-07-11 12:04     ` Bob Liu
2016-07-11 14:08       ` Evgenii Shatokhin
2016-07-14 11:49       ` Evgenii Shatokhin
2016-07-14 12:04         ` Bob Liu
2016-07-14 12:53           ` Evgenii Shatokhin
2016-08-10 12:33           ` Evgenii Shatokhin
2016-08-10 12:49             ` Bob Liu
2016-08-10 14:54               ` Evgenii Shatokhin
2016-08-11  2:10                 ` Bob Liu
2016-08-11  7:45                   ` Evgenii Shatokhin

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