On 30.12.2008, at 18:19, Todd Deshane wrote:

Some more information on this one:

I just pulled and installed the latest userspace, Now I get
a kernel panic: not syncing: IO-APIC + timer doesn't work!
Boot with apic=debug and send a report. Then try booting
with the 'noapic' option. (this is during the ubuntu CD boot
with the qemu line as:
qemu-system-x86_64 -hda ubuntu-server.img -cdrom
ubuntu-8.10-server-amd64.isoa

This message comes when less than n interrupts were received within m loop cycles. I actually do get that with native kvm too sometimes. Just try to boot the VM again.

I will try as the error says, but I think I am going to need
a better console (serial or vnc or something), since the
crash leaves the guest in a non usable state. can't ssh
or anything and it is spinning the CPU over 100%.

Eh - the l1 guest or the l2 (nested) guest? The l1 guest should never get to an unusable state.

I'll report back any new information. Any debugging tips
for this type of situation are most welcome.

Hum. I usually do a -monitor stdio for the nested kvm instance, but apart from that it's more a question of improvising :).

PS: I won't be around any AMD machine until next week, so I can't really see if it works reliably for me.

Alex

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