Aieee! CPU0 is toast...

[Thomas Kofler <xen@kofler.eu.org>]

Hi,


we use xen (bundled with Fedora Core 4) successfully on  a few servers.
But on one machine after installing then xen dom0 kernel the machines crashes.

We also tried to reduce the physical RAM to 1GByte, booting with the acpi=off 
and ignorebiostables and nosmp kernel options, and searched in the user/devel 
xen mailing lists - but didnt found any further information we could 
investigate.

We hope for help,
Thanks in advance,
Thomas

- kernel-xenU-2.6.12-1.1447_FC4, xen-2-20050522, kernel-xen0-2.6.12-1.1447_FC4
- SELinux is fully disabled
- No X-Window system is installed


HW-Configuration:
IBM NetFinity 5500, Dual Xeon-PIII 600 MHz, 1.5GByte RAM, ServRAID RAID1, 
QLogic 2200 HBA

Crash Dump:

...
(XEN) [<ff105f11>] [<ff105f09>] [ff136aa5>]

****************************************************
CPU0 Fatal Trap: vector = 6 (invalid operand)
[error_code=0000]
Aieee! CPU0 is toast...
****************************************************


/etc/grub.conf


title Fedora Core (2.6.12-1.1447_FC4xen0)
        root (hd0,0)
        kernel /xen.gz dom0_mem=131072
        module /vmlinuz-2.6.12-1.1447_FC4xen0 ro root=/dev/VolGroup00/LogVol00
        module /initrd-2.6.12-1.1447_FC4xen0.img
title Fedora Core (2.6.12-1.1398_FC4)
        root (hd0,0)
        kernel /vmlinuz-2.6.12-1.1398_FC4 ro root=/dev/VolGroup00/LogVol00
        initrd /initrd-2.6.12-1.1398_FC4.img
title Fedora Core (2.6.12-1.1398_FC4smp)
        root (hd0,0)
        kernel /vmlinuz-2.6.12-1.1398_FC4smp ro root=/dev/VolGroup00/LogVol00
        initrd /initrd-2.6.12-1.1398_FC4smp.img


/dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw)
/dev/proc on /proc type proc (rw)
/dev/sys on /sys type sysfs (rw)
/dev/devpts on /dev/pts type devpts (rw,gid=5,mode=620)
/dev/sda1 on /boot type ext3 (rw)
/dev/shm on /dev/shm type tmpfs (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
automount(pid1741) on /misc type autofs 
(rw,fd=4,pgrp=1741,minproto=2,maxproto=4)
automount(pid1778) on /net type autofs 
(rw,fd=4,pgrp=1778,minproto=2,maxproto=4)