Wido:

I already have guest.cpu.mode=host-passthrough.  Should I be using
something else?

Ron Gage


On Wed, 2026-04-08 at 22:39 +0200, Wido den Hollander via users wrote:
> 
> 
> Op 08-04-2026 om 22:27 schreef Ron Gage:
> > Hi Alex:
> > 
> > I am using NFS v4 for both primary and secondary storage.
> > 
> 
> That's not the problem. The problem is that by default the CloudStack
> Agent doesn't pass a CPU mode/type to Libvirt and thus Libvirt
> emulates 
> a Qemu Virtual CPU.
> 
> CentOS 9 doesn't like this and panics.
> 
> Take a look at this setting: 
> https://github.com/apache/cloudstack/blob/main/agent/conf/agent.properties#L187
> 
> Wido
> 
> > Ron
> > 
> > 
> > On 4/8/26 4:24 PM, Alex Evonosky wrote:
> > > What type of primary storage is being used?
> > > 
> > > On Wed, Apr 8, 2026 at 3:57 PM Ron Gage <[email protected]> wrote:
> > > 
> > >     Hi all:
> > > 
> > >     This problem has me completely stumped.  I am on a new 4.21
> > >     install on CentOS Stream 9 for both management and host. 
> > > When I
> > >     boot a Linux ISO, I get something similar to this:
> > > 
> > >     The above is an instance on Centos Stream 9.  I have similar
> > >     misfortune with Debian 12.10 and 13.
> > > 
> > >     Has anyone encountered something like this before?  Any hints
> > > on
> > >     tracing this down perhaps?
> > > 
> > >     The only thing I have tried so far was to specify
> > >     guest.cpu.mode=host-passthrough in the agent.properties on
> > > the KVM
> > >     host.
> > > 
> > >     Thank you!
> > > 
> > >     Ron Gage
> > > 
> > > 

-- 
Ron Gage
Westland, MI

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