Package: xen-hypervisor-4.0-amd64
Version: 4.0.1-1
Hardware specs:
Dell PowerEdge R410
32GB RAM DDR3
1TB RAID-1 HD (Perc H200 RAID controller)
Processor: 2 - Intel XeonE5620 2.4Ghz 12M Cache Turbo HT 1066MHz
SO: Debian Squeeze
last update: 14/10/2010
uname -a: "Linux spo-r1-u4 2.6.32-5-xen-amd64 #1 SMP Fri Sep 17 22:00:48
UTC 2010 x86_64 GNU/Linux"
At boot, xen-hypervisor is loaded normally, but when it tries to load
linux kernel it freezes. There is no screen output and after a few
seconds, the server reboots.
However, the problem doesn't happen if "acpi=off" parameter is used on
grub xen-hypervisor entry OR if the virtualization flags are disabled on
the BIOS.
Using the "acpi=off" parameters Xen is not able to detect the 16 cores
(8 fisical with hyperthread), only 8 cores. If the virtualization flags
are disabled all the 16 cores are detect.
Xen grub entry:
menuentry 'Debian GNU/Linux, with Linux 2.6.32-5-xen-amd64 and XEN
4.0-amd64' --class debian --class gnu-linux --class gnu --class os
--class xen {
insmod part_msdos
insmod ext2
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set 935213fd-c3c6-49ad-b818-a3b67704c585
echo 'Loading Linux 2.6.32-5-xen-amd64 ...'
multiboot /xen-4.0-amd64.gz placeholder acpi=off
module /vmlinuz-2.6.32-5-xen-amd64 placeholder
root=/dev/mapper/main-root ro quiet
echo 'Loading initial ramdisk ...'
module /initrd.img-2.6.32-5-xen-amd64
}
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