#### Qubes OS version (e.g., `R3.1`):
R3.1
#### Affected TemplateVMs (e.g., `fe…dora-23`, if applicable):
debian-8, Fedora-23, Whonix 13, probably every template
---
### Actual behavior:
```
qvm-run --pass-io sys-firewall date ; date
```
A two seconds time draft. (VM clock is two seconds faster.)
Does not always happen. If I spot this in one already running VM, I spot this in any already running VM that I test.
```
[271095.072610] timekeeping watchdog: Marking clocksource 'tsc' as unstable, because the skew is too large:
[271095.072619] 'xen' wd_now: f6aa707c0c8f wd_last: f6a8d4762faa mask: ffffffffffffffff
[271095.072624] 'tsc' cs_now: 1b6861d00 cs_last: 21d7172f2b8c4 mask: ffffffffffffffff
```
```
[user@sys-firewall ~]$ dmesg | grep clock
[ 0.000000] clocksource refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1910969940391419 ns
[ 0.000000] clocksource xen: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[ 0.068803] clocksource jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275000 ns
[ 0.149025] Switched to clocksource xen
[ 1.160042] clocksource tsc: mask: 0xffffffffffffffff max_cycles: 0x1fa3ddc950a, max_idle_ns: 440795245325 ns
[271095.072610] timekeeping watchdog: Marking clocksource 'tsc' as unstable, because the skew is too large:
```
```
[user@sys-firewall ~]$ dmesg | grep time
[ 0.000000] Xen: using vcpuop timer interface
[ 0.000000] installing Xen timer for CPU 0
[ 0.001000] Calibrating delay loop (skipped), value calculated using timer frequency.. 4390.06 BogoMIPS (lpj=2195032)
[ 0.001000] AppArmor: AppArmor disabled by boot time parameter
[ 0.060351] installing Xen timer for CPU 1
[ 0.061365] installing Xen timer for CPU 2
[ 0.062398] installing Xen timer for CPU 3
[ 0.063370] installing Xen timer for CPU 4
[ 0.064337] installing Xen timer for CPU 5
[ 0.065292] installing Xen timer for CPU 6
[ 0.066241] installing Xen timer for CPU 7
[ 0.089007] RTC time: 165:165:165, date: 165/165/65
[ 1.797777] systemd-journald[174]: Received request to flush runtime journal from PID 1
[271095.072610] timekeeping watchdog: Marking clocksource 'tsc' as unstable, because the skew is too large:
```
Full dmesg attached below.
### Expected behavior:
None of this should be happening.
### Steps to reproduce the behavior:
No cause / effect witnessed yet. Please run `dmesg | grep clock` in your AppVMs every now and then (on various computers). If we are lucky you will be able to reproduce it yourself.
### General notes:
Impact: Anonymity / Whonix is affected by this bug. Might break connectivity for some users. (#1779) On my systems, I witnessed only small skews yet, but for other users it may be much bigger and therefore causing Tor connection interruptions. Possibly also worsening privacy / fingerprinting.
---
#### Related issues:
#1779
---
```
[ 0.000000] PAT configuration [0-7]: WB WT UC- UC WC WP UC UC
[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Initializing cgroup subsys cpuacct
[ 0.000000] Linux version 4.1.13-9.pvops.qubes.x86_64 (user@release) (gcc version 4.8.3 20140911 (Red Hat 4.8.3-7) (GCC) ) #1 SMP Thu Feb 11 15:46:02 UTC 2016
[ 0.000000] Command line: root=/dev/mapper/dmroot ro nomodeset console=hvc0 rd_NO_PLYMOUTH 3 nopat
[ 0.000000] ACPI in unprivileged domain disabled
[ 0.000000] Released 0 page(s)
[ 0.000000] e820: BIOS-provided physical RAM map:
[ 0.000000] Xen: [mem 0x0000000000000000-0x000000000009ffff] usable
[ 0.000000] Xen: [mem 0x00000000000a0000-0x00000000000fffff] reserved
[ 0.000000] Xen: [mem 0x0000000000100000-0x00000000bb7fffff] usable
[ 0.000000] PAT support disabled.
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] DMI not present or invalid.
[ 0.000000] Hypervisor detected: Xen
[ 0.000000] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
[ 0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
[ 0.000000] e820: last_pfn = 0xbb800 max_arch_pfn = 0x400000000
[ 0.000000] Base memory trampoline at [ffff88000009a000] 9a000 size 24576
[ 0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
[ 0.000000] [mem 0x00000000-0x000fffff] page 4k
[ 0.000000] init_memory_mapping: [mem 0x12a00000-0x12bfffff]
[ 0.000000] [mem 0x12a00000-0x12bfffff] page 4k
[ 0.000000] BRK [0x0201f000, 0x0201ffff] PGTABLE
[ 0.000000] init_memory_mapping: [mem 0x00100000-0x129fffff]
[ 0.000000] [mem 0x00100000-0x129fffff] page 4k
[ 0.000000] init_memory_mapping: [mem 0x12c00000-0xbb7fffff]
[ 0.000000] [mem 0x12c00000-0xbb7fffff] page 4k
[ 0.000000] BRK [0x02020000, 0x02020fff] PGTABLE
[ 0.000000] BRK [0x02021000, 0x02021fff] PGTABLE
[ 0.000000] BRK [0x02022000, 0x02022fff] PGTABLE
[ 0.000000] BRK [0x02023000, 0x02023fff] PGTABLE
[ 0.000000] BRK [0x02024000, 0x02024fff] PGTABLE
[ 0.000000] RAMDISK: [mem 0x02046000-0x027dcfff]
[ 0.000000] NUMA turned off
[ 0.000000] Faking a node at [mem 0x0000000000000000-0x00000000bb7fffff]
[ 0.000000] NODE_DATA(0) allocated [mem 0x1262a000-0x1263dfff]
[ 0.000000] Zone ranges:
[ 0.000000] DMA [mem 0x0000000000001000-0x0000000000ffffff]
[ 0.000000] DMA32 [mem 0x0000000001000000-0x00000000bb7fffff]
[ 0.000000] Normal empty
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000001000-0x000000000009ffff]
[ 0.000000] node 0: [mem 0x0000000000100000-0x00000000bb7fffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000001000-0x00000000bb7fffff]
[ 0.000000] On node 0 totalpages: 767903
[ 0.000000] DMA zone: 64 pages used for memmap
[ 0.000000] DMA zone: 21 pages reserved
[ 0.000000] DMA zone: 3999 pages, LIFO batch:0
[ 0.000000] DMA32 zone: 11936 pages used for memmap
[ 0.000000] DMA32 zone: 763904 pages, LIFO batch:31
[ 0.000000] p2m virtual area at ffffc90000000000, size is 600000
[ 0.000000] Remapped 0 page(s)
[ 0.000000] SFI: Simple Firmware Interface v0.81 http://simplefirmware.org
[ 0.000000] smpboot: Allowing 8 CPUs, 0 hotplug CPUs
[ 0.000000] e820: [mem 0xbb800000-0xffffffff] available for PCI devices
[ 0.000000] Booting paravirtualized kernel on Xen
[ 0.000000] Xen version: 4.6.0 (preserve-AD)
[ 0.000000] clocksource refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1910969940391419 ns
[ 0.000000] setup_percpu: NR_CPUS:64 nr_cpumask_bits:64 nr_cpu_ids:8 nr_node_ids:1
[ 0.000000] PERCPU: Embedded 34 pages/cpu @ffff88000ec00000 s101080 r8192 d29992 u262144
[ 0.000000] pcpu-alloc: s101080 r8192 d29992 u262144 alloc=1*2097152
[ 0.000000] pcpu-alloc: [0] 0 1 2 3 4 5 6 7
[ 0.000000] xen: PV spinlocks enabled
[ 0.000000] Built 1 zonelists in Node order, mobility grouping on. Total pages: 755882
[ 0.000000] Policy zone: DMA32
[ 0.000000] Kernel command line: root=/dev/mapper/dmroot ro nomodeset console=hvc0 rd_NO_PLYMOUTH 3 nopat
[ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[ 0.000000] xsave: enabled xstate_bv 0x7, cntxt size 0x340 using standard form
[ 0.000000] Memory: 219700K/3071612K available (7578K kernel code, 1219K rwdata, 3272K rodata, 1504K init, 1464K bss, 2851912K reserved, 0K cma-reserved)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=8, Nodes=1
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] RCU dyntick-idle grace-period acceleration is enabled.
[ 0.000000] RCU restricting CPUs from NR_CPUS=64 to nr_cpu_ids=8.
[ 0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=8
[ 0.000000] NR_IRQS:4352 nr_irqs:144 16
[ 0.000000] xen:events: Using FIFO-based ABI
[ 0.000000] Offload RCU callbacks from all CPUs
[ 0.000000] Offload RCU callbacks from CPUs: 0-7.
[ 0.000000] Console: colour dummy device 80x25
[ 0.000000] console [tty0] enabled
[ 0.000000] console [hvc0] enabled
[ 0.000000] clocksource xen: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[ 0.000000] Xen: using vcpuop timer interface
[ 0.000000] installing Xen timer for CPU 0
[ 0.000000] tsc: Detected 2195.032 MHz processor
[ 0.001000] Calibrating delay loop (skipped), value calculated using timer frequency.. 4390.06 BogoMIPS (lpj=2195032)
[ 0.001000] pid_max: default: 32768 minimum: 301
[ 0.001000] Security Framework initialized
[ 0.001000] AppArmor: AppArmor disabled by boot time parameter
[ 0.001000] Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes)
[ 0.001423] Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes)
[ 0.001679] Mount-cache hash table entries: 8192 (order: 4, 65536 bytes)
[ 0.001693] Mountpoint-cache hash table entries: 8192 (order: 4, 65536 bytes)
[ 0.001888] Initializing cgroup subsys blkio
[ 0.001895] Initializing cgroup subsys memory
[ 0.001907] Initializing cgroup subsys devices
[ 0.001913] Initializing cgroup subsys freezer
[ 0.001918] Initializing cgroup subsys net_cls
[ 0.001924] Initializing cgroup subsys perf_event
[ 0.001930] Initializing cgroup subsys net_prio
[ 0.001936] Initializing cgroup subsys hugetlb
[ 0.001985] ENERGY_PERF_BIAS: Set to 'normal', was 'performance'
[ 0.001989] ENERGY_PERF_BIAS: View and update with x86_energy_perf_policy(8)
[ 0.001995] CPU: Physical Processor ID: 0
[ 0.001999] CPU: Processor Core ID: 1
[ 0.002798] Last level iTLB entries: 4KB 1024, 2MB 1024, 4MB 1024
[ 0.002802] Last level dTLB entries: 4KB 1024, 2MB 1024, 4MB 1024, 1GB 4
[ 0.027351] ftrace: allocating 27794 entries in 109 pages
[ 0.032050] cpu 0 spinlock event irq 17
[ 0.039131] Performance Events: unsupported p6 CPU model 70 no PMU driver, software events only.
[ 0.039645] NMI watchdog: disabled (cpu0): hardware events not enabled
[ 0.039649] NMI watchdog: Shutting down hard lockup detector on all cpus
[ 0.039705] SMP alternatives: switching to SMP code
[ 0.060351] installing Xen timer for CPU 1
[ 0.060366] cpu 1 spinlock event irq 24
[ 0.061365] installing Xen timer for CPU 2
[ 0.061374] cpu 2 spinlock event irq 31
[ 0.062398] installing Xen timer for CPU 3
[ 0.062404] cpu 3 spinlock event irq 38
[ 0.063370] installing Xen timer for CPU 4
[ 0.063377] cpu 4 spinlock event irq 45
[ 0.064337] installing Xen timer for CPU 5
[ 0.064344] cpu 5 spinlock event irq 52
[ 0.065292] installing Xen timer for CPU 6
[ 0.065299] cpu 6 spinlock event irq 59
[ 0.066241] installing Xen timer for CPU 7
[ 0.066248] cpu 7 spinlock event irq 66
[ 0.067135] x86: Booted up 1 node, 8 CPUs
[ 0.067193] devtmpfs: initialized
[ 0.068803] clocksource jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275000 ns
[ 0.069012] atomic64_test: passed for x86-64 platform with CX8 and with SSE
[ 0.069018] pinctrl core: initialized pinctrl subsystem
[ 0.089007] RTC time: 165:165:165, date: 165/165/65
[ 0.089127] NET: Registered protocol family 16
[ 0.089149] xen:grant_table: Grant tables using version 1 layout
[ 0.089157] Grant table initialized
[ 0.089379] PCI: setting up Xen PCI frontend stub
[ 0.089385] PCI: pci_cache_line_size set to 64 bytes
[ 0.093079] ACPI: Interpreter disabled.
[ 0.093079] xen:balloon: Initialising balloon driver
[ 0.100018] xen_balloon: Initialising balloon driver
[ 0.100037] vgaarb: loaded
[ 0.100057] SCSI subsystem initialized
[ 0.100083] libata version 3.00 loaded.
[ 0.100083] usbcore: registered new interface driver usbfs
[ 0.100083] usbcore: registered new interface driver hub
[ 0.100083] usbcore: registered new device driver usb
[ 0.100128] PCI: System does not support PCI
[ 0.100128] PCI: System does not support PCI
[ 0.100128] NetLabel: Initializing
[ 0.100128] NetLabel: domain hash size = 128
[ 0.100128] NetLabel: protocols = UNLABELED CIPSOv4
[ 0.100128] NetLabel: unlabeled traffic allowed by default
[ 0.149025] Switched to clocksource xen
[ 0.153214] pnp: PnP ACPI: disabled
[ 0.154680] NET: Registered protocol family 2
[ 0.154834] TCP established hash table entries: 32768 (order: 6, 262144 bytes)
[ 0.154930] TCP bind hash table entries: 32768 (order: 7, 524288 bytes)
[ 0.154976] TCP: Hash tables configured (established 32768 bind 32768)
[ 0.154995] UDP hash table entries: 2048 (order: 4, 65536 bytes)
[ 0.155019] UDP-Lite hash table entries: 2048 (order: 4, 65536 bytes)
[ 0.155058] NET: Registered protocol family 1
[ 0.155071] PCI: CLS 0 bytes, default 64
[ 0.155105] Unpacking initramfs...
[ 0.160131] Freeing initrd memory: 7772K (ffff880002046000 - ffff8800027dd000)
[ 0.160227] platform rtc_cmos: registered platform RTC device (no PNP device found)
[ 0.160796] AVX2 version of gcm_enc/dec engaged.
[ 0.160800] AES CTR mode by8 optimization enabled
[ 0.162047] alg: No test for __gcm-aes-aesni (__driver-gcm-aes-aesni)
[ 0.162367] futex hash table entries: 2048 (order: 5, 131072 bytes)
[ 0.162387] Initialise system trusted keyring
[ 0.162404] audit: initializing netlink subsys (disabled)
[ 0.162414] audit: type=2000 audit(1464686860.700:1): initialized
[ 0.162607] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[ 0.163535] zpool: loaded
[ 0.163540] zbud: loaded
[ 0.163663] VFS: Disk quotas dquot_6.6.0
[ 0.163687] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ 0.163961] Key type big_key registered
[ 0.164420] alg: No test for stdrng (krng)
[ 0.164430] NET: Registered protocol family 38
[ 0.164439] Key type asymmetric registered
[ 0.164443] Asymmetric key parser 'x509' registered
[ 0.164469] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)
[ 0.164531] io scheduler noop registered
[ 0.164535] io scheduler deadline registered
[ 0.164561] io scheduler cfq registered (default)
[ 0.164617] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[ 0.164629] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
[ 0.164650] intel_idle: does not run on family 6 model 70
[ 0.164786] xen:xen_evtchn: Event-channel device installed
[ 0.165091] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 0.165394] Non-volatile memory driver v1.3
[ 0.165424] Linux agpgart interface v0.103
[ 0.165975] libphy: Fixed MDIO Bus: probed
[ 0.166036] usbcore: registered new interface driver usbserial
[ 0.166044] usbcore: registered new interface driver usbserial_generic
[ 0.166052] usbserial: USB Serial support registered for generic
[ 0.166067] i8042: PNP: No PS/2 controller found. Probing ports directly.
[ 1.160042] clocksource tsc: mask: 0xffffffffffffffff max_cycles: 0x1fa3ddc950a, max_idle_ns: 440795245325 ns
[ 1.176408] i8042: No controller found
[ 1.176511] mousedev: PS/2 mouse device common for all mice
[ 1.196638] rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0
[ 1.196709] rtc_cmos: probe of rtc_cmos failed with error -38
[ 1.196778] device-mapper: uevent: version 1.0.3
[ 1.196854] device-mapper: ioctl: 4.31.0-ioctl (2015-3-12) initialised: dm-devel@redhat.com
[ 1.196941] hidraw: raw HID events driver (C) Jiri Kosina
[ 1.196977] usbcore: registered new interface driver usbhid
[ 1.196981] usbhid: USB HID core driver
[ 1.197019] drop_monitor: Initializing network drop monitor service
[ 1.197078] ip_tables: (C) 2000-2006 Netfilter Core Team
[ 1.197314] Initializing XFRM netlink socket
[ 1.197388] NET: Registered protocol family 10
[ 1.197588] mip6: Mobile IPv6
[ 1.197596] NET: Registered protocol family 17
[ 1.197605] mce: Unable to init device /dev/mcelog (rc: -5)
[ 1.197781] Loading compiled-in X.509 certificates
[ 1.197795] registered taskstats version 1
[ 1.197858] xenbus_probe_frontend: Device with no driver: device/vbd/51712
[ 1.197864] xenbus_probe_frontend: Device with no driver: device/vbd/51728
[ 1.197868] xenbus_probe_frontend: Device with no driver: device/vbd/51744
[ 1.197873] xenbus_probe_frontend: Device with no driver: device/vbd/51760
[ 1.197877] xenbus_probe_frontend: Device with no driver: device/vif/0
[ 1.197937] Magic number: 1:252:3141
[ 1.197960] hctosys: unable to open rtc device (rtc0)
[ 1.198409] Freeing unused kernel memory: 1504K (ffffffff81d32000 - ffffffff81eaa000)
[ 1.198415] Write protecting the kernel read-only data: 12288k
[ 1.200693] Freeing unused kernel memory: 604K (ffff880001769000 - ffff880001800000)
[ 1.200937] Freeing unused kernel memory: 824K (ffff880001b32000 - ffff880001c00000)
[ 1.203962] random: modprobe urandom read with 38 bits of entropy available
[ 1.216108] blkfront: xvda: flush diskcache: enabled; persistent grants: enabled; indirect descriptors: enabled;
[ 1.229243] blkfront: xvdb: flush diskcache: enabled; persistent grants: enabled; indirect descriptors: enabled;
[ 1.235364] blkfront: xvdc: flush diskcache: enabled; persistent grants: enabled; indirect descriptors: enabled;
[ 1.239219] blkfront: xvdd: barrier or flush: disabled; persistent grants: enabled; indirect descriptors: enabled;
[ 1.334371] xvdc: xvdc1 xvdc2
[ 1.367029] EXT4-fs (dm-0): couldn't mount as ext3 due to feature incompatibilities
[ 1.367121] EXT4-fs (dm-0): couldn't mount as ext2 due to feature incompatibilities
[ 1.367762] EXT4-fs (dm-0): mounted filesystem with ordered data mode. Opts: (null)
[ 1.370004] EXT4-fs (xvdd): mounting ext3 file system using the ext4 subsystem
[ 1.370425] EXT4-fs (xvdd): mounted filesystem with ordered data mode. Opts: (null)
[ 1.409008] random: nonblocking pool is initialized
[ 1.423375] systemd[1]: systemd 222 running in system mode. (+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ -LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN)
[ 1.423423] systemd[1]: Detected virtualization xen.
[ 1.423433] systemd[1]: Detected architecture x86-64.
[ 1.423841] systemd[1]: No hostname configured.
[ 1.423851] systemd[1]: Set hostname to <localhost>.
[ 1.464233] systemd[1]: Started Forward Password Requests to Wall Directory Watch.
[ 1.464253] systemd[1]: Starting Forward Password Requests to Wall Directory Watch.
[ 1.464344] systemd[1]: Reached target Remote File Systems.
[ 1.464354] systemd[1]: Starting Remote File Systems.
[ 1.464593] systemd[1]: Created slice Root Slice.
[ 1.464602] systemd[1]: Starting Root Slice.
[ 1.464711] systemd[1]: Listening on Journal Audit Socket.
[ 1.464720] systemd[1]: Starting Journal Audit Socket.
[ 1.464785] systemd[1]: Listening on udev Control Socket.
[ 1.464794] systemd[1]: Starting udev Control Socket.
[ 1.464856] systemd[1]: Listening on /dev/initctl Compatibility Named Pipe.
[ 1.464864] systemd[1]: Starting /dev/initctl Compatibility Named Pipe.
[ 1.464925] systemd[1]: Listening on Journal Socket (/dev/log).
[ 1.464933] systemd[1]: Starting Journal Socket (/dev/log).
[ 1.464987] systemd[1]: Listening on udev Kernel Socket.
[ 1.464995] systemd[1]: Starting udev Kernel Socket.
[ 1.465072] systemd[1]: Listening on Journal Socket.
[ 1.465085] systemd[1]: Starting Journal Socket.
[ 1.465211] systemd[1]: Created slice User and Session Slice.
[ 1.465220] systemd[1]: Starting User and Session Slice.
[ 1.465338] systemd[1]: Created slice System Slice.
[ 1.465351] systemd[1]: Starting System Slice.
[ 1.466141] systemd[1]: Starting Journal Service...
[ 1.466322] systemd[1]: Created slice system-serial\x2dgetty.slice.
[ 1.466339] systemd[1]: Starting system-serial\x2dgetty.slice.
[ 1.561456] systemd[1]: Mounting Huge Pages File System...
[ 1.562708] systemd[1]: Mounting Debug File System...
[ 1.562870] systemd[1]: Reached target Slices.
[ 1.562896] systemd[1]: Starting Slices.
[ 1.564379] systemd[1]: Starting Load Kernel Modules...
[ 1.564664] systemd[1]: Created slice system-getty.slice.
[ 1.564693] systemd[1]: Starting system-getty.slice.
[ 1.565776] systemd[1]: Starting Load legacy module configuration...
[ 1.567146] systemd[1]: Starting Setup Virtual Console...
[ 1.568162] systemd[1]: Mounting POSIX Message Queue File System...
[ 1.569729] systemd[1]: Starting Create list of required static device nodes for the current kernel...
[ 1.569948] systemd[1]: tmp.mount: Directory /tmp to mount over is not empty, mounting anyway.
[ 1.571185] systemd[1]: Mounting Temporary Directory...
[ 1.571578] systemd[1]: Set up automount Arbitrary Executable File Formats File System Automount Point.
[ 1.571619] systemd[1]: Starting Arbitrary Executable File Formats File System Automount Point.
[ 1.571870] systemd[1]: Started Set Up Additional Binary Formats.
[ 1.573227] systemd[1]: Starting File System Check on Root Device...
[ 1.574577] systemd[1]: Mounting /proc/xen...
[ 1.574756] systemd[1]: Reached target Encrypted Volumes.
[ 1.574796] systemd[1]: Starting Encrypted Volumes.
[ 1.576325] systemd[1]: Mounted POSIX Message Queue File System.
[ 1.576403] systemd[1]: Mounted Huge Pages File System.
[ 1.576477] systemd[1]: Mounted Debug File System.
[ 1.576541] systemd[1]: Mounted Temporary Directory.
[ 1.576780] systemd[1]: Started Journal Service.
[ 1.576933] audit: type=1130 audit(1464686862.114:2): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-journald comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[ 1.577058] dummy_hcd dummy_hcd.0: USB Host+Gadget Emulator, driver 02 May 2005
[ 1.577071] dummy_hcd dummy_hcd.0: Dummy host controller
[ 1.577153] dummy_hcd dummy_hcd.0: new USB bus registered, assigned bus number 1
[ 1.577201] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 1.577208] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 1.577216] usb usb1: Product: Dummy host controller
[ 1.577223] usb usb1: Manufacturer: Linux 4.1.13-9.pvops.qubes.x86_64 dummy_hcd
[ 1.577229] usb usb1: SerialNumber: dummy_hcd.0
[ 1.577378] hub 1-0:1.0: USB hub found
[ 1.577390] hub 1-0:1.0: 1 port detected
[ 1.760971] audit: type=1130 audit(1464686862.298:3): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=fedora-loadmodules comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[ 1.761407] audit: type=1130 audit(1464686862.299:4): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-vconsole-setup comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[ 1.761926] audit: type=1130 audit(1464686862.299:5): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-modules-load comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[ 1.762309] audit: type=1130 audit(1464686862.300:6): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=kmod-static-nodes comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[ 1.778778] audit: type=1130 audit(1464686862.316:7): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-sysctl comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[ 1.781481] audit: type=1130 audit(1464686862.319:8): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-fsck-root comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[ 1.786044] EXT4-fs (dm-0): re-mounted. Opts: (null)
[ 1.789829] audit: type=1130 audit(1464686862.327:9): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-remount-fs comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[ 1.797777] systemd-journald[174]: Received request to flush runtime journal from PID 1
[ 1.801683] audit: type=1130 audit(1464686862.339:10): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-tmpfiles-setup-dev comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[ 1.849964] input: PC Speaker as /devices/platform/pcspkr/input/input0
[ 1.868373] xen_netfront: Initialising Xen virtual ethernet driver
[ 1.961446] alg: No test for crc32 (crc32-pclmul)
[ 2.031553] nf_conntrack version 0.5.0 (1800 buckets, 7200 max)
[ 4.742400] Adding 1048572k swap on /dev/xvdc1. Priority:-1 extents:1 across:1048572k SSFS
[ 5.052849] ip6_tables: (C) 2000-2006 Netfilter Core Team
[ 5.080762] EXT4-fs (xvdb): mounted filesystem with ordered data mode. Opts: discard
[ 6.233084] IPv6: ADDRCONF(NETDEV_UP): vif3.0: link is not ready
[ 8.225068] vif vif-3-0 vif3.0: Guest Rx ready
[ 8.225102] IPv6: ADDRCONF(NETDEV_CHANGE): vif3.0: link becomes ready
[ 24.108738] fuse init (API version 7.23)
[ 157.464424] IPv6: ADDRCONF(NETDEV_UP): vif4.0: link is not ready
[ 159.660716] vif vif-4-0 vif4.0: Guest Rx ready
[ 159.660741] IPv6: ADDRCONF(NETDEV_CHANGE): vif4.0: link becomes ready
[ 160.787419] IPv6: ADDRCONF(NETDEV_UP): vif5.0: link is not ready
[ 162.878026] vif vif-5-0 vif5.0: Guest Rx ready
[ 162.878078] IPv6: ADDRCONF(NETDEV_CHANGE): vif5.0: link becomes ready
[ 164.996558] IPv6: ADDRCONF(NETDEV_UP): vif6.0: link is not ready
[ 167.380294] vif vif-6-0 vif6.0: Guest Rx ready
[ 167.380314] IPv6: ADDRCONF(NETDEV_CHANGE): vif6.0: link becomes ready
[ 411.620162] IPv6: ADDRCONF(NETDEV_UP): vif8.0: link is not ready
[ 413.701255] vif vif-8-0 vif8.0: Guest Rx ready
[ 413.701285] IPv6: ADDRCONF(NETDEV_CHANGE): vif8.0: link becomes ready
[ 4020.216591] IPv6: ADDRCONF(NETDEV_UP): vif9.0: link is not ready
[ 4022.336079] vif vif-9-0 vif9.0: Guest Rx ready
[ 4022.336099] IPv6: ADDRCONF(NETDEV_CHANGE): vif9.0: link becomes ready
[26299.580600] IPv6: ADDRCONF(NETDEV_UP): vif11.0: link is not ready
[26302.059399] vif vif-11-0 vif11.0: Guest Rx ready
[26302.059420] IPv6: ADDRCONF(NETDEV_CHANGE): vif11.0: link becomes ready
[271095.072610] timekeeping watchdog: Marking clocksource 'tsc' as unstable, because the skew is too large:
[271095.072619] 'xen' wd_now: f6aa707c0c8f wd_last: f6a8d4762faa mask: ffffffffffffffff
[271095.072624] 'tsc' cs_now: 1b6861d00 cs_last: 21d7172f2b8c4 mask: ffffffffffffffff
[272910.669973] IPv6: ADDRCONF(NETDEV_UP): vif16.0: link is not ready
[272913.183980] vif vif-16-0 vif16.0: Guest Rx ready
[272913.183998] IPv6: ADDRCONF(NETDEV_CHANGE): vif16.0: link becomes ready
[285388.035112] IPv6: ADDRCONF(NETDEV_UP): vif17.0: link is not ready
[285390.265269] vif vif-17-0 vif17.0: Guest Rx ready
[285390.265291] IPv6: ADDRCONF(NETDEV_CHANGE): vif17.0: link becomes ready
```