Xen users - Mar 2009 - Instability with vcpu > 1

Good Afternoon,

I''m having a problem running Xen 3.3 on Ubuntu 8.04 X64, running 32 bit
virtual machines.
Whenever I set vcpus to be greater than 1 on any of the vms, I see 
terrible instability- Multiple reboots each hour.

I''ve tried setting every combination of acpi=off  awiotlb=128
pci=noacpi
and noirqbalance

The Kernel on the Dom0 is 2.6.24-16-xen x86_64
The DomU is 2.6.24-19-xen i686

The physical hosts have 6-8GB of RAM, 80% of which I''m passing through 
directly to the DomU.
Any thoughts or help would be appreciated.

-Colin


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On Thu, Mar 19, 2009 at 11:59 PM, Colin Davis <cdavis@free411.com>
wrote:
> Good Afternoon,
>
> I''m having a problem running Xen 3.3 on Ubuntu 8.04 X64, running
32 bit
> virtual machines.
> Whenever I set vcpus to be greater than 1 on any of the vms, I see terrible
> instability- Multiple reboots each hour.
> Any thoughts or help would be appreciated.
dump Ubuntu?

I''m using RHEL5.3 dom0 on several servers with bundled Xen (3.1+) and
Xen 3.3.1 from gitco repo, all can run domUs with cpu>1 just fine.

You might want to try compiling xen yourself first though, with 2.6.18
kernel from xen.org.

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