On Thu, 23 Jun 2011, Pasi Kärkkäinen wrote:
The problem with RHEL6/CentOS6 is that Redhat bought Qumranet (the KVM company) and decided to only ship KVM host support in RHEL6.
RHEL6/CentOS6 runs as Xen VM though, so you can use RHEL5/CentOS5 Xen host (dom0) and run EL6 VMs on it.
The sources that will become CentOS 6 will run xen.org virtualization as a dom0, and KVM may be excluded
-- Russ herrold