[Xen-users] kernel panic on boot of dom0

["Ian P. Christian" <pookey@xxxxxxxxxxxx>]

I've managed to compile my dom0 kernel, however on attempting to boot to it, I 
get a kernel panic. After much fiddling aronud with a serial link I have 
managed to get this output. 

Any ideas or feedback are most welcome.  

(XEN) Scrubbing Free RAM: .....................done.
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to 
Xen).
Linux version 2.6.12.6.5-xen (root@bb3) (gcc version 3.4.4 (Gentoo 3.4.4-r1, 
ssp-3.4.4-1.0, pie-8.7.8)) #4 SMP Fri Nov 18 04:14:23 GMT 2005
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000006000000 (usable)
104MB LOWMEM available.
On node 0 totalpages: 26624
  DMA zone: 26624 pages, LIFO batch:15
  Normal zone: 0 pages, LIFO batch:1
  HighMem zone: 0 pages, LIFO batch:1
found SMP MP-table at 000fe710
DMI 2.3 present.
ACPI: RSDP (v000 DELL                                  ) @ 0x000fd650
ACPI: RSDT (v001 DELL   PESC1425 0x00000001 MSFT 0x0100000a) @ 0x000fd664
ACPI: FADT (v001 DELL   PESC1425 0x00000001 MSFT 0x0100000a) @ 0x000fd6b0
ACPI: MADT (v001 DELL   PESC1425 0x00000001 MSFT 0x0100000a) @ 0x000fd724
ACPI: SPCR (v001 DELL   PESC1425 0x00000001 MSFT 0x0100000a) @ 0x000fd7c0
ACPI: HPET (v001 DELL   PESC1425 0x00000001 MSFT 0x0100000a) @ 0x000fd810
ACPI: MCFG (v001 DELL   PESC1425 0x00000001 MSFT 0x0100000a) @ 0x000fd848
ACPI: DSDT (v001 DELL   PESC1425 0x00000001 MSFT 0x0100000e) @ 0x00000000
ACPI: Local APIC address 0xfee00000
ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
ACPI: LAPIC (acpi_id[0x02] lapic_id[0x06] enabled)
ACPI: LAPIC (acpi_id[0x03] lapic_id[0x01] enabled)
ACPI: LAPIC (acpi_id[0x04] lapic_id[0x07] enabled)
ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x02] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x03] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x04] high edge lint[0x1])
ACPI: IOAPIC (id[0x08] address[0xfec00000] gsi_base[0])
IOAPIC[0]: apic_id 8, version 32, address 0xfec00000, GSI 0-23
ACPI: IOAPIC (id[0x09] address[0xfec80000] gsi_base[32])
IOAPIC[1]: apic_id 9, version 32, address 0xfec80000, GSI 32-55
ACPI: IOAPIC (id[0x0a] address[0xfec80800] gsi_base[64])
IOAPIC[2]: apic_id 10, version 32, address 0xfec80800, GSI 64-87
ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
ACPI: IRQ0 used by override.
ACPI: IRQ2 used by override.
ACPI: IRQ9 used by override.
Enabling APIC mode:  Flat.  Using 3 I/O APICs
Using ACPI (MADT) for SMP configuration information
IRQ lockup detection disabled
Allocating PCI resources starting at 80000000 (gap: 7ffff000:60001000)
Built 1 zonelists
Kernel command line: root=/dev/sda3 noreboot console=ttyS0 debug
Initializing CPU#0
PID hash table entries: 512 (order: 9, 8192 bytes)
Xen reported: 2800.114 MHz processor.
Console: colour VGA+ 80x25
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
Software IO TLB disabled
vmalloc area: c7000000-fbee6000, maxmem 34000000
Memory: 93952k/106496k available (1907k kernel code, 4100k reserved, 513k 
data, 180k init, 0k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Calibrating delay loop... 5596.77 BogoMIPS (lpj=27983872)
Mount-cache hash table entries: 512
CPU: After generic identify, caps: bfebfbff 20100000 00000000 00000000 
0000641d 00000000 00000000
CPU: After vendor identify, caps: bfebfbff 20100000 00000000 00000000 0000641d 
00000000 00000000
CPU: Trace cache: 12K uops, L1 D cache: 16K
CPU: L2 cache: 1024K
CPU: After all inits, caps: bfebd3f1 20100000 00000000 00000080 0000641d 
00000000 00000000
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... disabled
ENABLING IO-APIC IRQs
Initializing CPU#1
Initializing CPU#2
Brought up 4 CPUs
Initializing CPU#3
domain 0: span 0
ERROR: domain->span does not contain CPU0
CPU0 attaching sched-domain:
ERROR: domain->groups does not contain CPU0
   groups:
ERROR: empty group
 0
ERROR: group is NULL

  domain 1: span f
   groups: f
CPU1 attaching sched-domain:
 domain 0: span 0
ERROR: domain->span does not contain CPU1
ERROR: domain->groups does not contain CPU1
  groups:
ERROR: empty group
 0
ERROR: group is NULL

  domain 1: span f
   groups: f
Unable to handle kernel NULL pointer dereference at virtual address 00000004
 printing eip:
c0119b94
*pde = ma 00000000 pa 55555000
Oops: 0000 [#1]
SMP
Modules linked in:
CPU:    0
EIP:    0061:[<c0119b94>]    Not tainted VLI
EFLAGS: 00010286   (2.6.12.6.5-xen)
EIP is at find_busiest_group+0x42/0x2e9
eax: 00000000   ebx: 00000000   ecx: 00000000   edx: 00000000
esi: c10d5e00   edi: 00000020   ebp: c1131dd0   esp: c1131d90
ds: 007b   es: 007b   ss: 0069
Process swapper (pid: 1, threadinfo=c1130000 task=c03c1a20)
Stack: 000000d0 00000100 c111c900 0000000c c111c910 00000000 00000080 00000000
       00000000 00000000 00000000 00000000 00000000 c10d5e00 c10d54a0 c1131eac
       c1131e00 c011a093 c10d5e00 00000000 c1131df0 00000002 c10d54a0 c1131e00
Call Trace:
 [<c011a093>] load_balance_newidle+0x33/0xa0
 [<c01187fd>] deactivate_task+0x20/0x2d
 [<c02dac51>] schedule+0x8bd/0xc94
 [<c0111755>] __down_trylock+0x65/0x7c
 [<c02da34f>] __down_failed_trylock+0x7/0xc
 [<c023247d>] scnprintf+0x28/0x35
 [<c02db0ad>] wait_for_completion+0x85/0xca
 [<c011a9c7>] default_wake_function+0x0/0x12
 [<c011a9c7>] default_wake_function+0x0/0x12
 [<c0118e45>] wake_up_process+0x1e/0x20
 [<c036b21d>] cpu_attach_domain+0xe2/0xef
 [<c036b3ad>] init_sched_build_groups+0x12d/0x166
 [<c036b838>] arch_init_sched_domains+0x401/0x45c
 [<c0104115>] init+0xb3/0x196
 [<c0104062>] init+0x0/0x196
 [<c0107589>] kernel_thread_helper+0x5/0xb
Code: 8b 45 08 8b 40 04 c7 45 d8 00 00 00 00 c7 45 e0 00 00 00 00 89 45 e8 c7 
45 dc 00 00 00 00 c7 45 e4 00 00 00 00 8b 4d 0c 8b 55 e8 <0f> a3 4a 04 19 d2 
8b 75 e8 89 55 d4 b9 0
 <0>Kernel panic - not syncing: Attempted to kill init!
 stop_this_cpu disable_local_APIC
stop_this_cpu disable_local_APIC


Kind Regards,

-- 
Ian P. Christian ~ http://pookey.co.uk

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