Today Redhat announces the availability of Enterprise version 5.4 featuring commercial support for KVM. Redhat describes this release as the “foundation for the Red Hat Enterprise Virtualization portfolio of solutions” and it will include both Xen and KVM support so Xen folks need not worry. This release can scale virtualization solutions up to 192 cpus and 1GB hugepages . Still pending is the release of the windows paravirtual drivers. It seems like there are still some bugs to iron out (thanks to Kenni for this information).

Below is an excerpt from the official announcement referring to KVM.

Finally, we’ll highlight the announcement of what’s absolutely new. The inclusion of kernel-based virtual machine (KVM) virtualization technology in this release, alongside of Xen virtualization technology, makes Red Hat Enterprise Linux 5.4 the foundation for the Red Hat Enterprise Virtualization portfolio of solutions that we first announced back in February of this year. In many ways, the introduction of commercial support for KVM, the next generation of virtualization technology, highlights what does not change in the Red Hat Enterprise Linux 5 family, which included virtualization from the start.

The official announcement can be found here.

http://press.redhat.com/2009/09/02/innovation-without-disruption-red-hat-enterprise-linux-5-4-now-available