Looks to me like it should work -- you have enough contiguous RAM to
store the initrd image. I just checked in new heap-initialisation code
that takes into account the e820 memory map. I think there may still
be a few bugs in it and you may be triggering one. It is worth trying
a debug build of Xen and seeing if that gives any more info about the
crash.
-- Keir
> I'm continuing to work on making a new XenCD as previously discussed here.
> In
> the course of that work, I've generated (actually, currently stuck on) the
> enclosed crash dump. Thought I'd forward it for interest.
>
> To head off questions, you'll see references to a very large initrd (~114
> Mb).
> The Xen dump may or not be related to this unusual usage. I've done both
> large initrds, small initrds, and small initrds in the past which copy larger
> filesystems to tmpfs. I've done huge initrds with success before, outside of
> Xen. The numbers below are calculated automatically and should be big
> enough,
> though may not be aligned properly.
>
> Mark Williamson: if you see this, could you forward me a copy of the Xen 1.2
> CD you offered to do earlier? I'd like to see to see which initrd techniques
> you used, if any.
>
> My GRUB config looks like:
>
> title xen
> kernel /boot/xen dom0_mem=318464 com1=115200,8n1 console=com1,vga
> ignorebiostables nmi=ignore sched=bvt conswitch=xy noreboot
> module /boot/xen0-vmlinuz ramdisk_size=203776 root=/dev/ram0 max_loop=96 rw
> console=ttyS0 vga=extended
> module /boot/xen0-initrd
>
> I can provide access to the ISO if anyone cares, though it's obviously
> non-functional currently.
>
> __ __ ____ ___
> \ \/ /___ _ __ |___ \ / _ \
> \ // _ \ '_ \ __) || | | |
> / \ __/ | | | / __/ | |_| |
> /_/\_\___|_| |_| |_____(_)___/
>
> http://www.cl.cam.ac.uk/netos/xen
> University of Cambridge Computer Laboratory
>
> Xen version 2.0 (jared@xxxxxxxxxxx) (gcc version 3.3.4 20040623 (Gentoo
> Linux 3.3.4-r1, ssp-3.3.2-2, pie-8.7.6)) Thu Dec 30 10:51:11 PST 2004
> Latest ChangeSet: 2004/12/30 18:27:27 1.1624 41d4488f9fINTxUzyjoq2FnTn5AvMQ
>
> (XEN) Physical RAM map:
> (XEN) 0000000000000000 - 000000000009f800 (usable)
> (XEN) 000000000009f800 - 00000000000a0000 (reserved)
> (XEN) 00000000000ca000 - 00000000000cc000 (reserved)
> (XEN) 00000000000dc000 - 00000000000e0000 (reserved)
> (XEN) 00000000000e4000 - 0000000000100000 (reserved)
> (XEN) 0000000000100000 - 000000001eef0000 (usable)
> (XEN) 000000001eef0000 - 000000001eefc000 (ACPI data)
> (XEN) 000000001eefc000 - 000000001ef00000 (ACPI NVS)
> (XEN) 000000001ef00000 - 000000001f000000 (usable)
> (XEN) 00000000fec00000 - 00000000fec10000 (reserved)
> (XEN) 00000000fee00000 - 00000000fee01000 (reserved)
> (XEN) 00000000fffe0000 - 0000000100000000 (reserved)
> (XEN) System RAM: 495MB (507452kB)
> (XEN) Xen heap: 10MB (10776kB)
> (XEN) CPU0: Before vendor init, caps: bfebfbff 00000000 00000000, vendor = 0
> (XEN) CPU#0: Hyper-Threading is disabled
> (XEN) CPU caps: bfebfbff 00000000 00000000 00000000
> (XEN) Using scheduler: Borrowed Virtual Time (bvt)
> (XEN) Initializing CPU#0
> (XEN) Detected 1197.895 MHz processor.
> (XEN) Found and enabled local APIC!
> (XEN) enabled ExtINT on CPU#0
> (XEN) ESR value before enabling vector: 00000000
> (XEN) ESR value after enabling vector: 00000000
> (XEN) Using local APIC timer interrupts.
> (XEN) Calibrating APIC timer for CPU0...
> (XEN) ..... CPU speed is 1197.8705 MHz.
> (XEN) ..... Bus speed is 69.3984 MHz.
> (XEN) ..... bus_scale = 0x00004711
> (XEN) Time init:
> (XEN) .... System Time: 1451424ns
> (XEN) .... cpu_freq: 00000000:47666D94
> (XEN) .... scale: 00000001:AB6A9983
> (XEN) .... Wall Clock: 1104628571s 10000us
> (XEN) PCI: PCI BIOS revision 2.10 entry at 0xfd9a0, last bus=1
> (XEN) PCI: Using configuration type 1
> (XEN) PCI: Probing PCI hardware
> (XEN) PCI: Probing PCI hardware (bus 00)
> (XEN) PCI: Using IRQ router PIIX/ICH [8086/7110] at 00:07.0
> (XEN) PCI: Cannot allocate resource region 4 of device 00:07.1
> (XEN) Limiting direct PCI/PCI transfers.
> (XEN) mtrr: v2.0 (20020519)
> (XEN) *** LOADING DOMAIN 0 ***
> (XEN) Xen-ELF header found:
> 'GUEST_OS=linux,GUEST_VER=2.6,XEN_VER=2.0,VIRT_BASE=0xC0000000,LOADER=generic,PT_MODE_WRITABLE'
> (XEN) PHYSICAL MEMORY ARRANGEMENT:
> (XEN) Kernel image: 00c00000->00ffcd48
> (XEN) Initrd image: 00ffd000->08bbb000
> (XEN) Dom0 alloc.: 08c00000->1c300000
> (XEN) VIRTUAL MEMORY ARRANGEMENT:
> (XEN) Loaded kernel: c0100000->c052a584
> (XEN) Init. ramdisk: c052b000->c80e9000
> (XEN) Phys-Mach map: c80e9000->c8136c00
> (XEN) Page tables: c8137000->c8159000
> (XEN) Start info: c8159000->c815a000
> (XEN) Boot stack: c815a000->c815b000
> (XEN) TOTAL: c0000000->c8400000
> (XEN) ENTRY ADDRESS: c0100000
> (XEN) Scrubbing DOM0 RAM: ....done.
> (XEN) Initrd len 0x7bbe000, start at 0xc052b000
> (XEN) Scrubbing Free RAM: ......done.
> (XEN) *** Serial input -> DOM0 (type 'CTRL-x' three times to switch input to
> Xen).
> Linux version 2.6.10-xen0 (jared@bear) (gcc version 3.3.4 20040623 (Gentoo
> Linux 3.3.4-r1, ssp-3.3.2-2, pie-8.7.6)) #1 Thu Dec 30 11:13:55 PST 2004
> BIOS-provided physical RAM map:
> Xen: 0000000000000000 - 0000000013700000 (usable)
> 311MB LOWMEM available.
> DMI not present.
> Built 1 zonelists
> Kernel command line: ramdisk_size=203776 root=/dev/ram0 max_loop=96 rw
> console=ttyS0 vga=extended
> Initializing CPU#0
> PID hash table entries: 2048 (order: 11, 32768 bytes)
> Xen reported: 1197.895 MHz processor.
> Using tsc for high-res timesource
> Console: colour VGA+ 80x25
> (XEN) BUG at domain.c:152
> (XEN) CPU: 0
> (XEN) EIP: 0808:[<fc50603e>]
> (XEN) EFLAGS: 00201296
> (XEN) eax: 00000000 ebx: fc5fd9e0 ecx: 00000000 edx: fc4b8f00
> (XEN) esi: 000d98f0 edi: c04f5200 ebp: 00000000 esp: fc503f9c
> (XEN) ds: 0810 es: 0810 fs: 0810 gs: 0810 ss: 0810
> (XEN) Stack trace from ESP=fc503f9c:
> (XEN) fc529841 fc529882 00000098 000d98f0 [fc527ae6] 00000808 fc5fd9e0
> 00000000
> (XEN) 00000001 00000000 c8159200 c04f5200 00000000 00020000 000d98f0
> 00000061
> (XEN) 000098f0 00201246 c04a1fb4 00000069 0000007b 0000007b 00000000
> 00000000
> (XEN) fc5fd9e0
> (XEN) Call Trace from ESP=fc503f9c: [<fc527ae6>]
>
> ****************************************
> CPU0 FATAL TRAP: vector = 6 (invalid operand)
> [error_code=0000]
> Aieee! CPU0 is toast...
> ****************************************
>
> Reboot in five seconds...
> (XEN) Reboot disabled on cmdline: require manual reset
>
>
>
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