"For all intents and purposes, the release of Red Hat Enterprise
Linux 5 (RHEL 5), Red Hat's flagship enterprise Linux operating
system, was billed as a success by industry observers and end
"Many lauded RHEL 5 for its advancements in virtualization
management, storage, security, application server development and
deployment. At the same time, however, when XenSource Inc.'s
paravirtualization functionality was first introduced with RHEL 5,
it was clear that it needed fine-tuning..."