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Bug#693851: Xen domU dynamic memory extension not working



Package: linux-image-2.6.32-5-xen-amd64
Version: 2.6.32-5

The dynamic memory extension is not working on PV domU kernel linux-image-2.6.32-5-xen-amd64 nor linux-image-2.6.32-5-amd64, but it's working once the domU is booting with linux-image-2.6.26-2-xen-amd64. During the investigation we discovered that the 'target' is updated correctly on dom0 and also /sys/devices/system/xen_memory/xen_memory0/target_kb file is correctly updated on domU - the only issue is that domU kernel do not make this memory 'change' effective. The shrink of memory is working well - only the increase above the initial memory value is not working - the same as expected on HVM guests.

dom0 is booting linux-image-2.6.32-5-xen-amd64 and Debian's Xen 4.0.1 is installed on the system. There is long discussion [1] on the xen-users mailing list with no root cause found.
Attached are domU and dom0 dmesg outputs.

[1] http://lists.xen.org/archives/html/xen-users/2012-11/msg00104.html

Best regards,
--
Peter Viskup
(XEN) Xen version 4.0.1 (Debian 4.0.1-5.4) (ultrotter@debian.org) (gcc version 4.4.5 (Debian 4.4.5-8) ) Sat Sep  8 19:15:46 UTC 2012
(XEN) Bootloader: GRUB 1.98+20100804-14+squeeze1
(XEN) Command line: placeholder dom0_mem=756M numa=off loglvl=all guest_loglvl=all
(XEN) Video information:
(XEN)  VGA is text mode 80x25, font 8x16
(XEN)  VBE/DDC methods: none; EDID transfer time: 0 seconds
(XEN)  EDID info not retrieved because no DDC retrieval method detected
(XEN) Disc information:
(XEN)  Found 6 MBR signatures
(XEN)  Found 6 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN)  0000000000000000 - 0000000000098000 (usable)
(XEN)  0000000000098000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 00000000dfcf0000 (usable)
(XEN)  00000000dfcf0000 - 00000000dfd96000 (ACPI NVS)
(XEN)  00000000dfd96000 - 00000000dfdfd000 (usable)
(XEN)  00000000dfdfd000 - 00000000dfe5f000 (reserved)
(XEN)  00000000dfe5f000 - 00000000dfe6a000 (usable)
(XEN)  00000000dfe6a000 - 00000000dfedf000 (ACPI NVS)
(XEN)  00000000dfedf000 - 00000000dfee7000 (usable)
(XEN)  00000000dfee7000 - 00000000dfeff000 (ACPI data)
(XEN)  00000000dfeff000 - 00000000dff00000 (usable)
(XEN)  00000000dff00000 - 00000000e0000000 (reserved)
(XEN)  00000000f0000000 - 00000000f4000000 (reserved)
(XEN)  00000000fff80000 - 00000000fff8c000 (reserved)
(XEN)  0000000100000000 - 0000000220000000 (usable)
(XEN) ACPI: RSDP 000F03C0, 0024 (r2 INTEL )
(XEN) ACPI: XSDT DFEFE120, 009C (r1 INTEL  S3200SHX        0 INTL  1000013)
(XEN) ACPI: FACP DFEFB000, 00F4 (r3 INTEL  S3200SHX        0 MSFT  1000013)
(XEN) ACPI: DSDT DFEF5000, 579C (r1 INTEL  S3200SHX        0 MSFT  1000013)
(XEN) ACPI: FACS DFE6A000, 0040
(XEN) ACPI: APIC DFEF4000, 0090 (r1 INTEL  S3200SHX        0 MSFT  1000013)
(XEN) ACPI: WDDT DFEF3000, 0040 (r1 INTEL  S3200SHX        0 MSFT  1000013)
(XEN) ACPI: MCFG DFEF2000, 003C (r1 INTEL  S3200SHX        0 MSFT  1000013)
(XEN) ACPI: SPCR DFEF1000, 0050 (r1 INTEL  S3200SHX        0 MSFT  1000013)
(XEN) ACPI: DMAR DFEF0000, 0110 (r1 INTEL  S3200SHX        1 MSFT  1000013)
(XEN) ACPI: SSDT DFEEF000, 0175 (r1 INTEL   Cpu0Ist       10 MSFT  1000013)
(XEN) ACPI: SSDT DFEEE000, 0175 (r1 INTEL   Cpu1Ist       10 MSFT  1000013)
(XEN) ACPI: SSDT DFEED000, 0175 (r1 INTEL   Cpu2Ist       10 MSFT  1000013)
(XEN) ACPI: SSDT DFEEC000, 0175 (r1 INTEL   Cpu3Ist       10 MSFT  1000013)
(XEN) ACPI: SSDT DFEEB000, 01BC (r1 INTEL     CpuPm       10 MSFT  1000013)
(XEN) ACPI: HEST DFEEA000, 00A8 (r1 INTEL  S3200SHX        1 INTL        1)
(XEN) ACPI: BERT DFEE9000, 0030 (r1 INTEL  S3200SHX        1 INTL        1)
(XEN) ACPI: ERST DFEE8000, 0230 (r1 INTEL  S3200SHX        1 INTL        1)
(XEN) ACPI: EINJ DFEE7000, 0130 (r1 INTEL  S3200SHX        1 INTL        1)
(XEN) System RAM: 8189MB (8385548kB)
(XEN) NUMA turned off
(XEN) Faking a node at 0000000000000000-0000000220000000
(XEN) Domain heap initialised
(XEN) found SMP MP-table at 000fd1f0
(XEN) DMI 2.5 present.
(XEN) Using APIC driver default
(XEN) ACPI: PM-Timer IO Port: 0x408
(XEN) ACPI: ACPI SLEEP INFO: pm1x_cnt[404,0], pm1x_evt[400,0]
(XEN) ACPI:                  wakeup_vec[dfe6a00c], vec_size[20]
(XEN) ACPI: Local APIC address 0xfee00000
(XEN) ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
(XEN) Processor #0 6:15 APIC version 20
(XEN) ACPI: LAPIC (acpi_id[0x02] lapic_id[0x02] enabled)
(XEN) Processor #2 6:15 APIC version 20
(XEN) ACPI: LAPIC (acpi_id[0x03] lapic_id[0x01] enabled)
(XEN) Processor #1 6:15 APIC version 20
(XEN) ACPI: LAPIC (acpi_id[0x04] lapic_id[0x03] enabled)
(XEN) Processor #3 6:15 APIC version 20
(XEN) ACPI: LAPIC_NMI (acpi_id[0x01] high level lint[0x1])
(XEN) ACPI: LAPIC_NMI (acpi_id[0x02] high level lint[0x1])
(XEN) ACPI: LAPIC_NMI (acpi_id[0x03] high level lint[0x1])
(XEN) ACPI: LAPIC_NMI (acpi_id[0x04] high level lint[0x1])
(XEN) ACPI: IOAPIC (id[0x05] address[0xfec00000] gsi_base[0])
(XEN) IOAPIC[0]: apic_id 5, version 32, address 0xfec00000, GSI 0-23
(XEN) ACPI: IOAPIC (id[0x06] address[0xfec10000] gsi_base[30])
(XEN) IOAPIC[1]: apic_id 6, version 32, address 0xfec10000, GSI 30-53
(XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
(XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
(XEN) ACPI: IRQ0 used by override.
(XEN) ACPI: IRQ2 used by override.
(XEN) ACPI: IRQ9 used by override.
(XEN) Enabling APIC mode:  Flat.  Using 2 I/O APICs
(XEN) [VT-D]iommu.c:1092: IOMMU: unsupported
(XEN) ---- print_iommu_regs ----
(XEN)  drhd->address = feb00000
(XEN)  VER = ffffffff
(XEN)  CAP = ffffffffffffffff
(XEN)  n_fault_reg = 100
(XEN)  fault_recording_offset = 3ff0
(XEN)  ECAP = ffffffffffffffff
(XEN)  GCMD = ffffffff
(XEN)  GSTS = ffffffff
(XEN)  RTADDR = ffffffffffffffff
(XEN)  CCMD = ffffffffffffffff
(XEN)  FSTS = ffffffff
(XEN)  FECTL = ffffffff
(XEN)  FEDATA = ffffffff
(XEN)  FEADDR = ffffffff
(XEN)  FEUADDR = ffffffff
(XEN) Failed to parse ACPI DMAR.  Disabling VT-d.
(XEN) PCI: MCFG configuration 0: base f0000000 segment 0 buses 0 - 255
(XEN) PCI: MCFG area at f0000000 reserved in E820
(XEN) PCI: updated MCFG configuration 0: base f0000000 segment 0 buses 0 - 63
(XEN) Using ACPI (MADT) for SMP configuration information
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Detected 2128.073 MHz processor.
(XEN) Initing memory sharing.
(XEN) VMX: Supported advanced features:
(XEN)  - APIC MMIO access virtualisation
(XEN)  - APIC TPR shadow
(XEN)  - Virtual NMI
(XEN)  - MSR direct-access bitmap
(XEN) HVM: ASIDs disabled.
(XEN) HVM: VMX enabled
(XEN) Intel machine check reporting enabled
(XEN) I/O virtualisation disabled
(XEN) Total of 4 processors activated.
(XEN) ENABLING IO-APIC IRQs
(XEN)  -> Using new ACK method
(XEN) ..TIMER: vector=0xF0 apic1=0 pin1=2 apic2=-1 pin2=-1
(XEN) checking TSC synchronization across 4 CPUs: passed.
(XEN) Platform timer appears to have unexpectedly wrapped 10 or more times.
(XEN) Platform timer is 3.579MHz ACPI PM Timer
(XEN) Allocated console ring of 32 KiB.
(XEN) microcode.c:73:d32767 microcode: CPU1 resumed
(XEN) microcode.c:73:d32767 microcode: CPU3 resumed
(XEN) Brought up 4 CPUs
(XEN) microcode.c:73:d32767 microcode: CPU2 resumed
(XEN) CPUIDLE: disabled due to no HPET. Force enable with 'cpuidle'.
(XEN) ACPI sleep modes: S3
(XEN) mcheck_poll: Machine check polling timer started.
(XEN) *** LOADING DOMAIN 0 ***
(XEN)  Xen  kernel: 64-bit, lsb, compat32
(XEN)  Dom0 kernel: 64-bit, PAE, lsb, paddr 0x1000000 -> 0x1708000
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)  Dom0 alloc.:   0000000214000000->0000000218000000 (177152 pages to be allocated)
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: ffffffff81000000->ffffffff81708000
(XEN)  Init. ramdisk: ffffffff81708000->ffffffff83584a00
(XEN)  Phys-Mach map: ffffffff83585000->ffffffff836ff000
(XEN)  Start info:    ffffffff836ff000->ffffffff836ff4b4
(XEN)  Page tables:   ffffffff83700000->ffffffff8371f000
(XEN)  Boot stack:    ffffffff8371f000->ffffffff83720000
(XEN)  TOTAL:         ffffffff80000000->ffffffff83800000
(XEN)  ENTRY ADDRESS: ffffffff81531200
(XEN) Dom0 has maximum 4 VCPUs
(XEN) Scrubbing Free RAM: .........................................................................done.
(XEN) trace.c:89:d32767 calc_tinfo_first_offset: NR_CPUs 128, offset_in_bytes 258, t_info_first_offset 65
(XEN) Xen trace buffers: disabled
(XEN) Std. Loglevel: All
(XEN) Guest Loglevel: All
(XEN) Xen is relinquishing VGA console.
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to Xen)
(XEN) Freed 176kB init memory.
(XEN) PCI add device 00:00.0
(XEN) PCI add device 00:06.0
(XEN) PCI add device 00:19.0
(XEN) PCI add device 00:1a.0
(XEN) PCI add device 00:1a.1
(XEN) PCI add device 00:1a.2
(XEN) PCI add device 00:1a.7
(XEN) PCI add device 00:1c.0
(XEN) PCI add device 00:1c.4
(XEN) PCI add device 00:1d.0
(XEN) PCI add device 00:1d.1
(XEN) PCI add device 00:1d.2
(XEN) PCI add device 00:1d.7
(XEN) PCI add device 00:1e.0
(XEN) PCI add device 00:1f.0
(XEN) PCI add device 00:1f.2
(XEN) PCI add device 00:1f.3
(XEN) PCI add device 01:00.0
(XEN) PCI add device 01:00.1
(XEN) PCI add device 02:00.0
(XEN) PCI add device 03:01.0
(XEN) PCI add device 04:00.0
(XEN) PCI add device 05:02.0
(XEN) grant_table.c:204:d0 Increased maptrack size to 2 frames.
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 2.6.32-5-amd64 (Debian 2.6.32-46) (dannf@debian.org) (gcc version 4.3.5 (Debian 4.3.5-4) ) #1 SMP Sun Sep 23 10:07:46 UTC 2012
[    0.000000] Command line: root=/dev/xvda1 ro selinux=0
[    0.000000] KERNEL supported cpus:
[    0.000000]   Intel GenuineIntel
[    0.000000]   AMD AuthenticAMD
[    0.000000]   Centaur CentaurHauls
[    0.000000] ACPI in unprivileged domain disabled
[    0.000000] BIOS-provided physical RAM map:
[    0.000000]  Xen: 0000000000000000 - 00000000000a0000 (usable)
[    0.000000]  Xen: 00000000000a0000 - 0000000000100000 (reserved)
[    0.000000]  Xen: 0000000000100000 - 0000000010000000 (usable)
[    0.000000] DMI not present or invalid.
[    0.000000] last_pfn = 0x10000 max_arch_pfn = 0x400000000
[    0.000000] initial memory mapped : 0 - 20000000
[    0.000000] init_memory_mapping: 0000000000000000-0000000010000000
[    0.000000]  0000000000 - 0010000000 page 4k
[    0.000000] kernel direct mapping tables up to 10000000 @ 8000-8a000
[    0.000000] RAMDISK: 016fa000 - 03576000
[    0.000000] No NUMA configuration found
[    0.000000] Faking a node at 0000000000000000-0000000010000000
[    0.000000] Bootmem setup node 0 0000000000000000-0000000010000000
[    0.000000]   NODE_DATA [0000000000068000 - 000000000006ffff]
[    0.000000]   bootmap [0000000000070000 -  0000000000071fff] pages 2
[    0.000000] (7 early reservations) ==> bootmem [0000000000 - 0010000000]
[    0.000000]   #0 [0000000000 - 0000001000]   BIOS data page ==> [0000000000 - 0000001000]
[    0.000000]   #1 [00035f9000 - 0003618000]   XEN PAGETABLES ==> [00035f9000 - 0003618000]
[    0.000000]   #2 [0000006000 - 0000008000]       TRAMPOLINE ==> [0000006000 - 0000008000]
[    0.000000]   #3 [0001000000 - 00016d9584]    TEXT DATA BSS ==> [0001000000 - 00016d9584]
[    0.000000]   #4 [00016fa000 - 0003576000]          RAMDISK ==> [00016fa000 - 0003576000]
[    0.000000]   #5 [0003576000 - 00035f9000]   XEN START INFO ==> [0003576000 - 00035f9000]
[    0.000000]   #6 [0000008000 - 0000068000]          PGTABLE ==> [0000008000 - 0000068000]
[    0.000000] Zone PFN ranges:
[    0.000000]   DMA      0x00000000 -> 0x00001000
[    0.000000]   DMA32    0x00001000 -> 0x00100000
[    0.000000]   Normal   0x00100000 -> 0x00100000
[    0.000000] Movable zone start PFN for each node
[    0.000000] early_node_map[2] active PFN ranges
[    0.000000]     0: 0x00000000 -> 0x000000a0
[    0.000000]     0: 0x00000100 -> 0x00010000
[    0.000000] On node 0 totalpages: 65440
[    0.000000]   DMA zone: 56 pages used for memmap
[    0.000000]   DMA zone: 99 pages reserved
[    0.000000]   DMA zone: 3845 pages, LIFO batch:0
[    0.000000]   DMA32 zone: 840 pages used for memmap
[    0.000000]   DMA32 zone: 60600 pages, LIFO batch:15
[    0.000000] SFI: Simple Firmware Interface v0.7 http://simplefirmware.org
[    0.000000] SMP: Allowing 1 CPUs, 0 hotplug CPUs
[    0.000000] No local APIC present
[    0.000000] APIC: disable apic facility
[    0.000000] nr_irqs_gsi: 16
[    0.000000] PM: Registered nosave memory: 00000000000a0000 - 0000000000100000
[    0.000000] Allocating PCI resources starting at 10000000 (gap: 10000000:f0000000)
[    0.000000] Booting paravirtualized kernel on Xen
[    0.000000] Xen version: 4.0.1 (preserve-AD)
[    0.000000] NR_CPUS:512 nr_cpumask_bits:512 nr_cpu_ids:1 nr_node_ids:1
[    0.000000] PERCPU: Embedded 30 pages/cpu @ffff88000364e000 s90328 r8192 d24360 u122880
[    0.000000] pcpu-alloc: s90328 r8192 d24360 u122880 alloc=30*4096
[    0.000000] pcpu-alloc: [0] 0 
[    0.000000] trying to map vcpu_info 0 at ffff880003659020, mfn 15c2bb, offset 32
[    0.000000] cpu 0 using vcpu_info at ffff880003659020
[    0.000000] Xen: using vcpu_info placement
[    0.000000] Built 1 zonelists in Node order, mobility grouping on.  Total pages: 64445
[    0.000000] Policy zone: DMA32
[    0.000000] Kernel command line: root=/dev/xvda1 ro selinux=0
[    0.000000] PID hash table entries: 1024 (order: 1, 8192 bytes)
[    0.000000] Initializing CPU#0
[    0.000000] Checking aperture...
[    0.000000] No AGP bridge found
[    0.000000] Calgary: detecting Calgary via BIOS EBDA area
[    0.000000] Calgary: Unable to locate Rio Grande table in EBDA - bailing!
[    0.000000] Memory: 218480k/262144k available (3083k kernel code, 384k absent, 43280k reserved, 2048k data, 592k init)
[    0.000000] SLUB: Genslabs=14, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] Hierarchical RCU implementation.
[    0.000000] NR_IRQS:4352 nr_irqs:256
[    0.000000] Console: colour dummy device 80x25
[    0.000000] console [tty0] enabled
[    0.000000] console [hvc0] enabled
[    0.000000] Xen: using vcpuop timer interface
[    0.000000] installing Xen timer for CPU 0
[    0.000000] Detected 2128.072 MHz processor.
[    0.004000] Calibrating delay loop (skipped), value calculated using timer frequency.. 4256.14 BogoMIPS (lpj=8512288)
[    0.004000] Security Framework initialized
[    0.004000] SELinux:  Disabled at boot.
[    0.004000] Dentry cache hash table entries: 32768 (order: 6, 262144 bytes)
[    0.004000] Inode-cache hash table entries: 16384 (order: 5, 131072 bytes)
[    0.004000] Mount-cache hash table entries: 256
[    0.004000] Initializing cgroup subsys ns
[    0.004000] Initializing cgroup subsys cpuacct
[    0.004000] Initializing cgroup subsys devices
[    0.004000] Initializing cgroup subsys freezer
[    0.004000] Initializing cgroup subsys net_cls
[    0.004000] CPU: L1 I cache: 32K, L1 D cache: 32K
[    0.004000] CPU: L2 cache: 4096K
[    0.004000] CPU 0/0x3 -> Node 0
[    0.004000] CPU: Unsupported number of siblings 4
[    0.004000] Performance Events: unsupported p6 CPU model 15 no PMU driver, software events only.
[    0.004000] SMP alternatives: switching to UP code
[    0.004000] Freeing SMP alternatives: 28k freed
[    0.004226] Brought up 1 CPUs
[    0.004251] CPU0 attaching NULL sched-domain.
[    0.004392] devtmpfs: initialized
[    0.007719] Grant table initialized
[    0.007726] regulator: core version 0.5
[    0.007787] NET: Registered protocol family 16
[    0.008042] PCI: Fatal: No config space access function found
[    0.008532] bio: create slab <bio-0> at 0
[    0.008620] ACPI: Interpreter disabled.
[    0.008648] xen_balloon: Initialising balloon driver.
[    0.008648] vgaarb: loaded
[    0.008648] PCI: System does not support PCI
[    0.008648] PCI: System does not support PCI
[    0.008648] Switching to clocksource xen
[    0.009950] pnp: PnP ACPI: disabled
[    0.010252] NET: Registered protocol family 2
[    0.010338] IP route cache hash table entries: 2048 (order: 2, 16384 bytes)
[    0.010594] TCP established hash table entries: 8192 (order: 5, 131072 bytes)
[    0.010676] TCP bind hash table entries: 8192 (order: 5, 131072 bytes)
[    0.010725] TCP: Hash tables configured (established 8192 bind 8192)
[    0.010732] TCP reno registered
[    0.010793] NET: Registered protocol family 1
[    0.010848] Unpacking initramfs...
[    0.048046] Freeing initrd memory: 31216k freed
[    0.062990] platform rtc_cmos: registered platform RTC device (no PNP device found)
[    0.063286] audit: initializing netlink socket (disabled)
[    0.063308] type=2000 audit(1352944830.067:1): initialized
[    0.066933] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[    0.068458] VFS: Disk quotas dquot_6.5.2
[    0.068516] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[    0.068609] msgmni has been set to 487
[    0.068848] alg: No test for stdrng (krng)
[    0.068915] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253)
[    0.068925] io scheduler noop registered
[    0.068931] io scheduler anticipatory registered
[    0.068937] io scheduler deadline registered
[    0.069003] io scheduler cfq registered (default)
[    0.071773] Linux agpgart interface v0.103
[    0.071812] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    0.072025] input: Macintosh mouse button emulation as /devices/virtual/input/input0
[    0.072083] PNP: No PS/2 controller found. Probing ports directly.
[    0.072913] i8042.c: No controller found.
[    0.072987] mice: PS/2 mouse device common for all mice
[    0.073046] rtc_cmos: probe of rtc_cmos failed with error -16
[    0.073076] cpuidle: using governor ladder
[    0.073083] cpuidle: using governor menu
[    0.073091] No iBFT detected.
[    0.073357] TCP cubic registered
[    0.073484] NET: Registered protocol family 10
[    0.074160] Mobile IPv6
[    0.074167] NET: Registered protocol family 17
[    0.074257] PM: Resume from disk failed.
[    0.074268] registered taskstats version 1
[    0.074284] XENBUS: Device with no driver: device/vbd/51713
[    0.074290] XENBUS: Device with no driver: device/vbd/51714
[    0.074297] XENBUS: Device with no driver: device/vbd/51715
[    0.074302] XENBUS: Device with no driver: device/vbd/51716
[    0.074308] XENBUS: Device with no driver: device/vbd/51717
[    0.074314] XENBUS: Device with no driver: device/vbd/51718
[    0.074320] XENBUS: Device with no driver: device/vif/0
[    0.074326] XENBUS: Device with no driver: device/vif/1
[    0.074332] XENBUS: Device with no driver: device/console/0
[    0.074352] /build/buildd-linux-2.6_2.6.32-46-amd64-_ApuPc/linux-2.6-2.6.32/debian/build/source_amd64_none/drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
[    0.074392] Initalizing network drop monitor service
[    0.074458] Freeing unused kernel memory: 592k freed
[    0.074661] Write protecting the kernel read-only data: 4240k
[    0.128182] udev[50]: starting version 164
[    0.167657] Initialising Xen virtual ethernet driver.
[    0.310911] blkfront: xvda1: barriers enabled
[    0.315330] blkfront: xvda2: barriers enabled
[    0.324817] blkfront: xvda3: barriers enabled
[    0.327870] blkfront: xvda4: barriers enabled
[    0.329409] blkfront: xvda5: barriers enabled
[    0.330733] blkfront: xvda6: barriers enabled
[    0.726789] md: raid1 personality registered for level 1
[    1.247904] device-mapper: uevent: version 1.0.3
[    1.248723] device-mapper: ioctl: 4.15.0-ioctl (2009-04-01) initialised: dm-devel@redhat.com
[    1.468204] EXT3-fs: INFO: recovery required on readonly filesystem.
[    1.468219] EXT3-fs: write access will be enabled during recovery.
[    1.544343] kjournald starting.  Commit interval 5 seconds
[    1.544372] EXT3-fs: recovery complete.
[    1.545224] EXT3-fs: mounted filesystem with ordered data mode.
[    3.016471] udev[190]: starting version 164
[    3.476322] input: PC Speaker as /devices/platform/pcspkr/input/input1
[    3.805755] Error: Driver 'pcspkr' is already registered, aborting...
[    3.926893] Adding 524280k swap on /dev/xvda2.  Priority:-1 extents:1 across:524280k SS
[    4.079922] EXT3 FS on xvda1, internal journal
[    7.826298] kjournald starting.  Commit interval 5 seconds
[    7.826684] EXT3 FS on xvda3, internal journal
[    7.826699] EXT3-fs: mounted filesystem with ordered data mode.
[    7.865795] kjournald starting.  Commit interval 5 seconds
[    7.870558] EXT3 FS on xvda4, internal journal
[    7.870583] EXT3-fs: mounted filesystem with ordered data mode.
[    7.884979] kjournald starting.  Commit interval 5 seconds
[    7.885320] EXT3 FS on xvda5, internal journal
[    7.885335] EXT3-fs: mounted filesystem with ordered data mode.
[    7.897617] kjournald starting.  Commit interval 5 seconds
[    7.898105] EXT3 FS on xvda6, internal journal
[    7.898121] EXT3-fs: mounted filesystem with ordered data mode.
[    9.522611] 802.1Q VLAN Support v1.8 Ben Greear <greearb@candelatech.com>
[    9.522627] All bugs added by David S. Miller <davem@redhat.com>
[   19.504020] eth0: no IPv6 routers present
[   20.168027] eth1: no IPv6 routers present
[   20.496026] vlan100: no IPv6 routers present
[   33.472792] ip_tables: (C) 2000-2006 Netfilter Core Team
[   33.629242] nf_conntrack version 0.5.0 (1955 buckets, 7820 max)
[   33.629776] CONFIG_NF_CT_ACCT is deprecated and will be removed soon. Please use
[   33.629787] nf_conntrack.acct=1 kernel parameter, acct=1 nf_conntrack module option or
[   33.629795] sysctl net.netfilter.nf_conntrack_acct=1 to enable it.

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