[virt-tools-list] why -no-kvm flag?

Cole Robinson crobinso at redhat.com
Mon Feb 8 19:40:40 UTC 2010

On 02/08/2010 12:30 PM, Dan Bar Dov wrote:
> I've upgraded qemu-kvm to 0.12.2, (as well as virt-manager: 0.8.2, and
> virtinst 0.500.1) and noticed
> all virtual machines are extremely slow.
> I noticed the qemu is now started using /usr/bin/qemu-system-x86_64 with
> -no-kvm switch.
> I'm guessing this is working in full emulation mode and no hardware support,
> which explains
> the slowness.
> What affects the selection of the -no-kvm switch? What do I need to do to
> get it working
> properly again?

Are these newly created VMs, or existing ones that worked fine before
the update? Can you post the output of 'virsh dumpxml $vmname' for an
affected VM?


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