C7 Xen-4.6 Crash.

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Installing xen on a fairly clean c7.2 system. I get a xen kernel panic.

(XEN) Bad console= option ‘tty’
Xen 4.6.0-9.el7
(XEN) Xen version 4.6.0-9.el7 (mockbuild@CentOS.org) (gcc (GCC) 4.8.5
20150623 (Red Hat 4.8.5-4)) debug=n Wed Jan 20 12:25:53 UTC 2016
(XEN) Latest ChangeSet: Thu Jan 14 15:35:35 2016 +0000 git:6e8597a-dirty
(XEN) Bootloader: GRUB 2.02~beta2
(XEN) Command line: placeholder dom0_mem24M,max:1024M cpuinfo com15200,8n1 console=com1,tty loglvl=all guest_loglvl=all
(XEN) Video information:
(XEN) VGA is text mode 80×25, font 8×16
(XEN) VBE/DDC methods: V2; EDID transfer time: 2 seconds
(XEN) Disc information:
(XEN) Found 1 MBR signatures
(XEN) Found 1 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN) 0000000000000000 – 000000000009ac00 (usable)
(XEN) 000000000009ac00 – 00000000000a0000 (reserved)
(XEN) 00000000000e0000 – 0000000000100000 (reserved)
(XEN) 0000000000100000 – 00000000bffc7280 (usable)
(XEN) 00000000bffc7280 – 00000000bffceac0 (ACPI data)
(XEN) 00000000bffceac0 – 00000000c0000000 (reserved)
(XEN) 00000000e0000000 – 00000000f0000000 (reserved)
(XEN) 00000000fec00000 – 0000000100000000 (reserved)
(XEN) 0000000100000000 – 0000000840000000 (usable)
(XEN) ACPI: RSDP 000FDFD0, 0024 (r2 IBM )
(XEN) ACPI: XSDT BFFCE980, 0054 (r1 IBM SERVALNT 1000 IBM 45444F43)
(XEN) ACPI: FACP BFFCE8C0, 0084 (r2 IBM SERVALNT 1000 IBM 45444F43)
(XEN) ACPI: DSDT BFFC7280, 2F12 (r2 IBM SERVALNT 1000 INTL 20041203)
(XEN) ACPI: FACS BFFCA7C0, 0040
(XEN) ACPI: APIC BFFCE800, 0084 (r1 IBM SERVALNT 1000 IBM 45444F43)
(XEN) ACPI: SRAT BFFCE6C0, 00E8 (r1 IBM SERVALNT 1000 IBM 45444F43)
(XEN) ACPI: HPET BFFCE680, 0038 (r1 IBM SERVALNT 1000 IBM 45444F43)
(XEN) ACPI: MCFG BFFCE640, 003C (r1 IBM SERVALNT 1000 IBM 45444F43)
(XEN) ACPI: ERST BFFCA800, 0230 (r1 IBM SERVALNT 1000 IBM 45444F43)
(XEN) System RAM: 32767MB (33553796kB)
(XEN) SRAT: PXM 0 -> APIC 0 -> Node 0
(XEN) SRAT: PXM 0 -> APIC 1 -> Node 0
(XEN) SRAT: PXM 0 -> APIC 6 -> Node 0
(XEN) SRAT: PXM 0 -> APIC 7 -> Node 0
(XEN) SRAT: Node 0 PXM 0 0-c0000000
(XEN) SRAT: Node 0 PXM 0 100000000-840000000
(XEN) SRAT: Node 0 PXM 0 840000000-841000000 (hotplug)
(XEN) NUMA: Using 18 for the hash shift.
(XEN) Domain heap initialised
(XEN) found SMP MP-table at 0009ad40
(XEN) DMI 2.4 present.
(XEN) Using APIC driver default
(XEN) ACPI: PM-Timer IO Port: 0x588
(XEN) ACPI: SLEEP INFO: pm1x_cnt[1:584,1:0], pm1x_evt[1:580,1:0]
(XEN) ACPI: wakeup_vec[bffca7cc], vec_size[20]
(XEN) ACPI: Local APIC address 0xfee00000
(XEN) ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
(XEN) Processor #0 6:15 APIC version 20
(XEN) ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled)
(XEN) Processor #1 6:15 APIC version 20
(XEN) ACPI: LAPIC (acpi_id[0x02] lapic_id[0x06] enabled)
(XEN) Processor #6 6:15 APIC version 20
(XEN) ACPI: LAPIC (acpi_id[0x03] lapic_id[0x07] enabled)
(XEN) Processor #7 6:15 APIC version 20
(XEN) ACPI: LAPIC_NMI (acpi_id[0x00] dfl dfl lint[0x1])
(XEN) ACPI: LAPIC_NMI (acpi_id[0x01] dfl dfl lint[0x1])
(XEN) ACPI: LAPIC_NMI (acpi_id[0x02] dfl dfl lint[0x1])
(XEN) ACPI: LAPIC_NMI (acpi_id[0x03] dfl dfl lint[0x1])
(XEN) ACPI: IOAPIC (id[0x0e] address[0xfec00000] gsi_base[0])
(XEN) IOAPIC[0]: apic_id 14, version 32, address 0xfec00000, GSI 0-23
(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 1 I/O APICs
(XEN) ACPI: HPET id: 0x8086a201 base: 0xfed00000
(XEN) Invalid bit width in GAR
(XEN) Using ACPI (MADT) for SMP configuration information
(XEN) SMP: Allowing 4 CPUs (0 hotplug CPUs)
(XEN) IRQ limits: 24 GSI, 760 MSI/MSI-X
(XEN) CPU: L1 I cache: 32K, L1 D cache: 32K
(XEN) CPU: L2 cache: 4096K
(XEN) CPU: Physical Processor ID: 0
(XEN) CPU: Processor Core ID: 0
(XEN) CMCI: CPU0 has no CMCI support
(XEN) CPU0: Thermal monitoring enabled (TM2)
(XEN) Intel machine check reporting enabled
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Initializing CPU#0
(XEN) Detected 2992.543 MHz processor.
(XEN) Initing memory sharing.
(XEN) alt table ffff82d0802b8c50 -> ffff82d0802b9ff4
(XEN) PCI: MCFG configuration 0: base e0000000 segment 0000 buses 00 – 25
(XEN) PCI: MCFG area at e0000000 reserved in E820
(XEN) PCI: Using MCFG for segment 0000 bus 00-25
(XEN) I/O virtualisation disabled
(XEN) CPU0: Intel(R) Xeon(R) CPU 5160 @ 3.00GHz stepping 06
(XEN) ENABLING IO-APIC IRQs
(XEN) -> Using new ACK method
(XEN) ..TIMER: vector=0xF0 apic1=0 pin1=2 apic2=-1 pde.
(XEN) Enabling APIC mode: Flat. Using 1 I/O APICs
(XEN) ACPI: HPET id: 0x8086a201 base: 0xfed00000
(XEN) Invalid bit width in GAR
(XEN) Using ACPI (MADT) for SMP configuration information
(XEN) SMP: Allowing 4 CPUs (0 hotplug CPUs)
(XEN) IRQ limits: 24 GSI, 760 MSI/MSI-X
(XEN) CPU: L1 I cache: 32K, L1 D cache: 32K
(XEN) CPU: L2 cache: 4096K
(XEN) CPU: Physical Processor ID: 0
(XEN) CPU: Processor Core ID: 0
(XEN) CMCI: CPU0 has no CMCI support
(XEN) CPU0: Thermal monitoring enabled (TM2)
(XEN) Intel machine check reporting enabled
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Initializing CPU#0
(XEN) Detected 2992.579 MHz processor.
(XEN) Initing memory sharing.
(XEN) alt table ffff82d0802b8c50 -> ffff82d0802b9ff4
(XEN) PCI: MCFG configuration 0: base e0000000 segment 0000 buses 00 – 25
(XEN) PCI: MCFG area at e0000000 reserved in E820
(XEN) PCI: Using MCFG for segment 0000 bus 00-25
(XEN) I/O virtualisation disabled
(XEN) CPU0: Intel(R) Xeon(R) CPU 5160 @ 3.00GHz stepping 06
(XEN) ENABLING IO-APIC IRQs
(XEN) -> Using new ACK method
(XEN) ..TIMER: vector=0xF0 apic1=0 pin1=2 apic2=-1 pin2=-1
(XEN) Platform timer is 14.318MHz HPET
(XEN) Allocated console ring of 32 KiB.
(XEN) mwait-idle: does not run on family 6 model 15
(XEN) VMX: Supported advanced features:ing 06
(XEN) CPU 2 APIC 6 -> Node 0
(XEN) Booting processor 2/6 eip 8a000
(XEN) Initializing CPU#2
(XEN) CPU: L1 I cache: 32K, L1 D cache: 32K
(XEN) CPU: L2 cache: 4096K
(XEN) CPU: Physical Processor ID: 3
(XEN) CPU: Processor Core ID: 0
(XEN) CMCI: CPU2 has no CMCI support
(XEN) CPU2: Thermal monitoring enabled (TM2)
(XEN) CPU2: Intel(R) Xeon(R) CPU 5160 @ 3.00GHz stepping 06
(XEN) —-[ Xen-4.6.0-9.el7 x86_64 debug=n Not tainted ]–

2 thoughts on - C7 Xen-4.6 Crash.

  • I wrote about this a couple months back.  George asked me to submit to the Xen developers list, but I never had the time due to work demands on getting the new server set up.  In my case, I had to use a different server.  The new motherboard/CPU had no issues with the second CPU.  If you turn off and unplug the second CPU, it will work.

    Check the archives for my e-mail address and see George’s replies.  If you can follow through with reporting it, that would be great.

  • This is a bug that was fixed on the development branch in December; a fix is included in the recently-released 4.6.1. I’m testing 4.6.1
    packages now, they’ll probably hit mirrors in a day or two.

    -George

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