Paravirtualization bad, hardware virtualization good, is not an accurate view. You actually want a hybrid model to get the best performance. That's why KVM deve

Paravirtualization bad, hardware virtualization good, is not an accurate view. You actually want a hybrid model to get the best performance. That's why KVM developers have put so much effort into the paravirtualized virtio drivers, for example. Xen has put lots of work into taking advantage of new hardware virtualization technology where it makes sense and continuing paravirtualization where it makes sense. See the two links below for great details. http://blog.xen.org/index.php/2012/10/23/the-paravirtualization-spectrum-part-1-the-ends-of-the-spectrum/ http://blog.xen.org/index.php/2012/10/23/the-paravirtualizat... http://blog.xen.org/index.php/2012/10/31/the-paravirtualization-spectrum-part-2-from-poles-to-a-spectrum/ http://blog.xen.org/index.php/2012/10/31/the-paravirtualizat...