Re: [Xen-users] xen4 kernel crash 2.6.32-5-xen-amd64 poweredge R710 w/ squeeze

[Alexander Bienzeisler <chosi@xxxxxxxxx>]

Hey Oliver,

booting without the memory option crashes earlier without info

[...]
(XEN) Intel VT-d Snoop Control supported.
(XEN) Intel VT-d DMA Passthrough not supported.
(XEN) Intel VT-d Queued Invalidation supported.
(XEN) Intel VT-d Interrupt Remapping supported.
(XEN) I/O virtualisation enabled
(XEN)  - Dom0 mode: Relaxed
(XEN) Enabled directed EOI with ioapic_ack_old on!
(XEN) Total of 24 processors activated.
(XEN) ENABLING IO-APIC IRQs
(XEN)  -> Using old ACK method
(XEN) TSC is reliable, synchronization unnecessary
(XEN) Platform timer is 14.318MHz HPET
▒(XEN) Allocated c

booting without dom0_max_vcpus but with dom0_mem ends here and reboots:

[   32.892043]  [<ffffffff81508c7d>] ? xen_start_kernel+0x57c/0x581
[   32.892095] Code: d8 c1 e8 13 83 e0 01 09 44 24 64 41 89 dc 44 23 25 28 01 43 00 44 89
[   32.893996] RIP  [<ffffffff810badce>] __alloc_pages_nodemask+0x8f/0x5f5
[   32.894078]  RSP <ffffffff81443c88>
[   32.894125] CR2: 0000000000005a08
[   32.894177] ---[ end trace a7919e7f17c0a725 ]---
[   32.894228] Kernel panic - not syncing: Attempted to kill the idle task!
[   32.894282] Pid: 0, comm: swapper Tainted: G      D    2.6.32-5-xen-amd64 #1
[   32.894337] Call Trace:
[   32.894385]  [<ffffffff8130a45a>] ? panic+0x86/0x141
[   32.894437]  [<ffffffff8130a563>] ? printk+0x4e/0x5b
[   32.894491]  [<ffffffff81051f7b>] ? do_exit+0x72/0x6b5
[   32.894543]  [<ffffffff8100ec72>] ? check_events+0x12/0x20
[   32.894597]  [<ffffffff8130d1bd>] ? oops_end+0xaf/0xb4
[   32.894651]  [<ffffffff8103338c>] ? no_context+0x1e9/0x1f8
[   32.894704]  [<ffffffff81033541>] ? __bad_area_nosemaphore+0x1a6/0x1ca
[   32.894759]  [<ffffffff8130e541>] ? do_page_fault+0x2b/0x2fc
[   32.894812]  [<ffffffff8130c695>] ? page_fault+0x25/0x30
[   32.894865]  [<ffffffff811ba519>] ? vgacon_cursor+0x0/0x140
[   32.894918]  [<ffffffff810badce>] ? __alloc_pages_nodemask+0x8f/0x5f5
[   32.894973]  [<ffffffff811ba519>] ? vgacon_cursor+0x0/0x140
[   32.895054]  [<ffffffff8100e5b5>] ? xen_force_evtchn_callback+0x9/0xa
[   32.895108]  [<ffffffff8100ec72>] ? check_events+0x12/0x20
[   32.895161]  [<ffffffff811ba519>] ? vgacon_cursor+0x0/0x140
[   32.895214]  [<ffffffff811ba519>] ? vgacon_cursor+0x0/0x140
[   32.895267]  [<ffffffff8

Hello,

Do you try booting with dom0_mem option ?
Could you try without it ?

We may have the same bug here.

Regards

Olivier


Le 07/11/2010 10:36, Alexander Bienzeisler a écrit :

Hello,

I'm experiencing a kernel crash with XEN4 on my poweredge R710. I'm running debian squeeze and installed the packaged xen4 (2.6.32-5-xen-amd64) the kernel itself runs fine without XEN. Is there anything you can tell from that log?

Thanks in advance,
Alex


(XEN) Dom0 has maximum 4 VCPUs
(XEN) Scrubbing Free RAM: ............................................................[...].............................................done.
(XEN) Xen trace buffers: disabled
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(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.
mapping kernel into physical memory
Xen: setup ISA identity maps
about to get started...
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 2.6.32-5-xen-amd64 (Debian 2.6.32-27) (maks@xxxxxxxxxx) (gcc version 4.3.5 (Debian 4.3.5-4) ) #1 SMP Sat Oct 30 17:04:10 UTC 2010
[    0.000000] Command line: placeholder root=UUID=4c2ad0b7-aee0-412e-b5ae-10ae34f03c73 ro xencons=hvc console=tty0 console=hvc0
[    0.000000] KERNEL supported cpus:
[    0.000000]   Intel GenuineIntel
[    0.000000]   AMD AuthenticAMD
[    0.000000]   Centaur CentaurHauls
[    0.000000] released 0 pages of unused memory
[    0.000000] BIOS-provided physical RAM map:
[    0.000000]  Xen: 0000000000000000 - 00000000000a0000 (usable)
[    0.000000]  Xen: 00000000000a0000 - 0000000000100000 (reserved)
[    0.000000]  Xen: 0000000000100000 - 0000000080000000 (usable)
[    0.000000]  Xen: 00000000bf679000 - 00000000bf68f000 (reserved)
[    0.000000]  Xen: 00000000bf68f000 - 00000000bf6ce000 (ACPI data)
[    0.000000]  Xen: 00000000bf6ce000 - 00000000c0000000 (reserved)
[    0.000000]  Xen: 00000000e0000000 - 00000000f0000000 (reserved)
[    0.000000]  Xen: 00000000fe000000 - 0000000100000000 (reserved)
[    0.000000] DMI 2.6 present.
[    0.000000] last_pfn = 0x80000 max_arch_pfn = 0x400000000
[    0.000000] x86 PAT enabled: cpu 0, old 0x50100070406, new 0x7010600070106
[    0.000000] init_memory_mapping: 0000000000000000-0000000080000000
[    0.000000] RAMDISK: 016b5000 - 03244e00
[    0.000000] ACPI: RSDP 00000000000f0a90 00024 (v02 DELL  )
[    0.000000] ACPI: XSDT 00000000000f0b94 0009C (v01 DELL   PE_SC3   00000001 DELL 00000001)
[    0.000000] ACPI: FACP 00000000bf6b3f9c 000F4 (v03 DELL   PE_SC3   00000001 DELL 00000001)
[    0.000000] ACPI: DSDT 00000000bf68f000 03D5A (v01 DELL   PE_SC3   00000001 INTL 20050624)
[    0.000000] ACPI: FACS 00000000bf6b6000 00040
[    0.000000] ACPI: APIC 00000000bf6b3478 0015E (v01 DELL   PE_SC3   00000001 DELL 00000001)
[    0.000000] ACPI: SPCR 00000000bf6b35d8 00050 (v01 DELL   PE_SC3   00000001 DELL 00000001)
[    0.000000] ACPI: HPET 00000000bf6b362c 00038 (v01 DELL   PE_SC3   00000001 DELL 00000001)
[    0.000000] ACPI: XMAR 00000000bf6b3668 001C0 (v01 DELL   PE_SC3   00000001 DELL 00000001)
[    0.000000] ACPI: MCFG 00000000bf6b38c4 0003C (v01 DELL   PE_SC3   00000001 DELL 00000001)
[    0.000000] ACPI: WD__ 00000000bf6b3904 00134 (v01 DELL   PE_SC3   00000001 DELL 00000001)
[    0.000000] ACPI: SLIC 00000000bf6b3a3c 00024 (v01 DELL   PE_SC3   00000001 DELL 00000001)
[    0.000000] ACPI: ERST 00000000bf692edc 00270 (v01 DELL   PE_SC3   00000001 DELL 00000001)
[    0.000000] ACPI: HEST 00000000bf69314c 003A8 (v01 DELL   PE_SC3   00000001 DELL 00000001)
[    0.000000] ACPI: BERT 00000000bf692d5c 00030 (v01 DELL   PE_SC3   00000001 DELL 00000001)
[    0.000000] ACPI: EINJ 00000000bf692d8c 00150 (v01 DELL   PE_SC3   00000001 DELL 00000001)
[    0.000000] ACPI: SRAT 00000000bf6b3bc0 00370 (v01 DELL   PE_SC3   00000001 DELL 00000001)
[    0.000000] ACPI: TCPA 00000000bf6b3f34 00064 (v02 DELL   PE_SC3   00000001 DELL 00000001)
[    0.000000] ACPI: SSDT 00000000bf6b7000 07B84 (v01  INTEL PPM RCM  80000001 INTL 20061109)
[    0.000000] SRAT: PXM 1 -> APIC 32 -> Node 0
[    0.000000] SRAT: PXM 2 -> APIC 0 -> Node 1
[    0.000000] SRAT: PXM 1 -> APIC 34 -> Node 0
[    0.000000] SRAT: PXM 2 -> APIC 2 -> Node 1
[    0.000000] SRAT: PXM 1 -> APIC 36 -> Node 0
[    0.000000] SRAT: PXM 2 -> APIC 4 -> Node 1
[    0.000000] SRAT: PXM 1 -> APIC 48 -> Node 0
[    0.000000] SRAT: PXM 2 -> APIC 16 -> Node 1
[    0.000000] SRAT: PXM 1 -> APIC 50 -> Node 0
[    0.000000] SRAT: PXM 2 -> APIC 18 -> Node 1
[    0.000000] SRAT: PXM 1 -> APIC 52 -> Node 0
[    0.000000] SRAT: PXM 2 -> APIC 20 -> Node 1
[    0.000000] SRAT: PXM 1 -> APIC 33 -> Node 0
[    0.000000] SRAT: PXM 2 -> APIC 1 -> Node 1
[    0.000000] SRAT: PXM 1 -> APIC 35 -> Node 0
[    0.000000] SRAT: PXM 2 -> APIC 3 -> Node 1
[    0.000000] SRAT: PXM 1 -> APIC 37 -> Node 0
[    0.000000] SRAT: PXM 2 -> APIC 5 -> Node 1
[    0.000000] SRAT: PXM 1 -> APIC 49 -> Node 0
[    0.000000] SRAT: PXM 2 -> APIC 17 -> Node 1
[    0.000000] SRAT: PXM 1 -> APIC 51 -> Node 0
[    0.000000] SRAT: PXM 2 -> APIC 19 -> Node 1
[    0.000000] SRAT: PXM 1 -> APIC 53 -> Node 0
[    0.000000] SRAT: PXM 2 -> APIC 21 -> Node 1
[    0.000000] SRAT: Node 1 PXM 2 0-c0000000
[    0.000000] SRAT: Node 1 PXM 2 100000000-c40000000
[    0.000000] SRAT: Node 0 PXM 1 c40000000-1840000000
[    0.000000] Bootmem setup node 1 0000000000000000-0000000080000000
[    0.000000]   NODE_DATA [0000000000008100 - 00000000000100ff]
[    0.000000]   bootmap [0000000000011000 -  0000000000020fff] pages 10
[    0.000000] (9 early reservations) ==> bootmem [0000000000 - 0080000000]
[    0.000000]   #0 [0000000000 - 0000001000]   BIOS data page ==> [0000000000 - 0000001000]
[    0.000000]   #1 [0003646000 - 0003665000]   XEN PAGETABLES ==> [0003646000 - 0003665000]
[    0.000000]   #2 [0000006000 - 0000008000]       TRAMPOLINE ==> [0000006000 - 0000008000]
[    0.000000]   #3 [0001000000 - 0001694994]    TEXT DATA BSS ==> [0001000000 - 0001694994]
[    0.000000]   #4 [00016b5000 - 0003244e00]          RAMDISK ==> [00016b5000 - 0003244e00]
[    0.000000]   #5 [0003245000 - 0003646000]   XEN START INFO ==> [0003245000 - 0003646000]
[    0.000000]   #6 [0001695000 - 00016954fd]              BRK ==> [0001695000 - 00016954fd]
[    0.000000]   #7 [0000100000 - 00004e1000]          PGTABLE ==> [0000100000 - 00004e1000]
[    0.000000]   #8 [0000008000 - 0000008100]       MEMNODEMAP ==> [0000008000 - 0000008100]
[    0.000000] found SMP MP-table at [ffff8800000fe710] fe710
[    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]     1: 0x00000000 -> 0x000000a0
[    0.000000]     1: 0x00000100 -> 0x00080000
[    0.000000] ACPI: PM-Timer IO Port: 0x808
[    0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x20] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x00] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x03] lapic_id[0x22] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x04] lapic_id[0x02] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x05] lapic_id[0x24] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x06] lapic_id[0x04] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x07] lapic_id[0x30] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x08] lapic_id[0x10] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x09] lapic_id[0x32] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x0a] lapic_id[0x12] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x0b] lapic_id[0x34] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x0c] lapic_id[0x14] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x0d] lapic_id[0x21] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x0e] lapic_id[0x01] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x0f] lapic_id[0x23] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x10] lapic_id[0x03] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x11] lapic_id[0x25] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x12] lapic_id[0x05] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x13] lapic_id[0x31] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x14] lapic_id[0x11] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x15] lapic_id[0x33] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x16] lapic_id[0x13] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x17] lapic_id[0x35] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x18] lapic_id[0x15] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x19] lapic_id[0x38] disabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x1a] lapic_id[0x39] disabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x1b] lapic_id[0x3a] disabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x1c] lapic_id[0x3b] disabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x1d] lapic_id[0x3c] disabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x1e] lapic_id[0x3d] disabled)
[0.000000] ACPI: LAPIC (acpi_id[0x1f] lapic_id[0x3e] disabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x20] lapic_id[0x3f] disabled)
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0xff] high edge lint[0x1])
[    0.000000] ACPI: IOAPIC (id[0x00] address[0xfec00000] gsi_base[0])
[    0.000000] IOAPIC[0]: apic_id 0, version 0, address 0xfec00000, GSI 0-0
[    0.000000] ACPI: IOAPIC (id[0x01] address[0xfec80000] gsi_base[32])
[    0.000000] IOAPIC[1]: apic_id 1, version 0, address 0xfec80000, GSI 32-32
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[    0.000000] ERROR: Unable to locate IOAPIC for GSI 2
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[    0.000000] ERROR: Unable to locate IOAPIC for GSI 9
[    0.000000] Using ACPI (MADT) for SMP configuration information
[    0.000000] ACPI: HPET id: 0x8086a301 base: 0xfed00000
[    0.000000] SMP: Allowing 4 CPUs, 0 hotplug CPUs
[    0.000000] PM: Registered nosave memory: 00000000000a0000 - 0000000000100000
[    0.000000] Allocating PCI resources starting at 80000000 (gap: 80000000:3f679000)
[    0.000000] Booting paravirtualized kernel on Xen
[    0.000000] Xen version: 4.0.1 (preserve-AD) (dom0)
[    0.000000] NR_CPUS:512 nr_cpumask_bits:512 nr_cpu_ids:4 nr_node_ids:2
[    0.000000] PERCPU: Embedded 30 pages/cpu @ffff88000369b000 s90328 r8192 d24360 u122880
[    0.000000] pcpu-alloc: s90328 r8192 d24360 u122880 alloc=30*4096
[    0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
[   31.988891] Xen: using vcpu_info placement
[   31.988895] Built 1 zonelists in Node order, mobility grouping on.  Total pages: 516028
[   31.988897] Policy zone: DMA32
[   31.988899] Kernel command line: placeholder root=UUID=4c2ad0b7-aee0-412e-b5ae-10ae34f03c73 ro xencons=hvc console=tty0 console=hvc0
[   31.988925] PID hash table entries: 4096 (order: 3, 32768 bytes)
[   31.989135] Initializing CPU#0
[   31.996490] DMA: Placing 64MB software IO TLB between ffff880005676000 - ffff880009676000
[   31.996493] DMA: software IO TLB at phys 0x5676000 - 0x9676000
[   31.996495] xen_swiotlb_fixup: buf=ffff880005676000 size=67108864
[   32.011535] xen_swiotlb_fixup: buf=ffff8800096d6000 size=32768
[   32.017975] Memory: 1958112k/2097152k available (3145k kernel code, 384k absent, 138656k reserved, 1902k data, 596k init)
[   32.018008] SLUB: Genslabs=14, HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=2
[   32.018028] Hierarchical RCU implementation.
[   32.018034] NR_IRQS:4352 nr_irqs:1280
[   32.018144] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[   32.018146] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[   32.018148] xen: sci override: source_irq=9 global_irq=9 trigger=c polarity=1
[   32.018151] xen_allocate_pirq: returning irq 9 for gsi 9
[   32.018183] xen: acpi sci 9
[   32.023932] Console: colour VGA+ 80x25
[   32.032354] console [tty0] enabled
[   32.053118] console [hvc0] enabled
[   32.053189] installing Xen timer for CPU 0
[   32.053278] BUG: unable to handle kernel paging request at 0000000000005a08
[   32.053396] IP: [<ffffffff810badce>] __alloc_pages_nodemask+0x8f/0x5f5
[   32.053491] PGD 0
[   32.053567] Thread overran stack, or stack corrupted

[   32.053623] Oops: 0000 [#1] SMP
[   32.053729] last sysfs file:
[   32.053778] CPU 0
[   32.053854] Modules linked in:
[   32.053931] Pid: 0, comm: swapper Not tainted 2.6.32-5-xen-amd64 #1 PowerEdge R710
[   32.054002] RIP: e030:[<ffffffff810badce>]  [<ffffffff810badce>] __alloc_pages_nodemask+0x8f/0x5f5
[   32.054103] RSP: e02b:ffffffff81443c88  EFLAGS: 00010046
[   32.054158] RAX: 0000000000000000 RBX: 0000000000005220 RCX: 0000000000005a00
[   32.054214] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000005220
[   32.054290] RBP: 0000000000004020 R08: 0000000000000001 R09: ffff88007fc1f010
[   32.054354] R10: ffffffff813c2700 R11: ffffffff811ba519 R12: 0000000000005220
[   32.054412] R13: 0000000000000001 R14: 0000000000000000 R15: ffff88000000db28
[   32.054473] FS:  0000000000000000(0000) GS:ffff88000369b000(0000) knlGS:0000000000000000
[   32.054550] CS:  e033 DS: 0000 ES: 0000 CR0: 000000008005003b
[   32.054605] CR2: 0000000000005a08 CR3: 0000000001001000 CR4: 0000000000002660
[   32.054696] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   32.054762] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[   32.054827] Process swapper (pid: 0, threadinfo ffffffff81442000, task ffffffff814771f0)
[   32.054898] Stack:
[   32.054943]  ffff88000000db00 000000108100ec72 00000000000212d0 ffffffff811ba519
[   32.055084] <0> ffff88000000ad10 ffffffff8100e5b5 ffffffff8100ec72 ffffffff811ba519
[   32.055299] <0> ffffffff811ba519 0000000000000000 0000000000005a00 0000000000000000
[   32.055577] Call Trace:
[   32.055633]  [<ffffffff811ba519>] ? vgacon_cursor+0x0/0x140
[   32.055694]  [<ffffffff8100e5b5>] ? xen_force_evtchn_callback+0x9/0xa
[   32.055750]  [<ffffffff8100ec72>] ? check_events+0x12/0x20
[   32.055803]  [<ffffffff811ba519>] ? vgacon_cursor+0x0/0x140
[   32.055856]  [<ffffffff811ba519>] ? vgacon_cursor+0x0/0x140
[   32.055916]  [<ffffffff810e759d>] ? new_slab+0x42/0x1ca
[   32.055973]  [<ffffffff810e7915>] ? __slab_alloc+0x1f0/0x39b
[   32.056064]  [<ffffffff812f87d8>] ? irq_to_desc_alloc_node+0x96/0x195
[   32.056120]  [<ffffffff810e85cb>] ? __kmalloc_node+0xe8/0x146
[   32.056174]  [<ffffffff812f87d8>] ? irq_to_desc_alloc_node+0x96/0x195
[   32.056232]  [<ffffffff812f87d8>] ? irq_to_desc_alloc_node+0x96/0x195
[   32.056288]  [<ffffffff811ba519>] ? vgacon_cursor+0x0/0x140
[   32.056357]  [<ffffffff811f24df>] ? find_unbound_irq+0x67/0xae
[   32.056414]  [<ffffffff811f259e>] ? bind_virq_to_irq+0x78/0x126
[   32.056475]  [<ffffffff8100e5b5>] ? xen_force_evtchn_callback+0x9/0xa
[   32.056536]  [<ffffffff8100e8f6>] ? xen_timer_interrupt+0x0/0x18d
[   32.056590]  [<ffffffff811f29f6>] ? bind_virq_to_irqhandler+0x19/0x4a
[   32.056644]  [<ffffffff8100e884>] ? xen_setup_timer+0x55/0xaa
[   32.056699]  [<ffffffff81509a5e>] ? xen_time_init+0xaf/0xb5
[   32.056753]  [<ffffffff8150a491>] ? x86_late_time_init+0xa/0x10
[   32.056811]  [<ffffffff81506c3d>] ? start_kernel+0x348/0x3e8
[   32.056867]  [<ffffffff81508c7d>] ? xen_start_kernel+0x57c/0x581
[   32.056927] Code: d8 c1 e8 13 83 e0 01 09 44 24 64 41 89 dc 44 23 25 28 01 43 00 44 89 e2 83 e2 10 89 54 24 5c 74 05 e8 16 03 25 00 48 8b 4c 24 50 <48> 83 79 08 00 0f 84 30 05 00 00 83 e3 0f 48 8b 44 24 50 41 bf

[   32.058848] RIP  [<ffffffff810badce>] __alloc_pages_nodemask+0x8f/0x5f5
[   32.058930]  RSP <ffffffff81443c88>
[   32.058978] CR2: 0000000000005a08
[   32.059030] ---[ end trace a7919e7f17c0a725 ]---
[   32.059081] Kernel panic - not syncing: Attempted to kill the idle task!
[   3

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