Virtualization new era starts with KVM...

KVM (Kernel-based Virtual Machine) has been accepted by kernel gurus such as Linus Torvalds and Andrew Morton for inclusion in version 2.6.20 of the Linux kernel, developers said earlier this week. The system consists of a loadable kernel module and a user component, and is licensed under the GNU General Public License.

KVM links: KVM website, KVM whitepaper, Qumranet,

KVM is a patch to the Linux kernel that is more like VServer, Solaris containers, or microkernels [see footnote], where the OS still sits directly on the hardware. Some aspects of the current KVM release (mostly pulled from their FAQ):

• KVM guest OSs appear as a process and can be managed with top, kill, etc.
• KVM requires either a VT capable Intel processor or an SVM capable AMD processor (which is a currently a big limitation for grid providers but this will become less and less of an issue as older clusters are phased out).
• Uses QEMU for guest instantiation, but is not an emulator itself
• Runs Windows 32bit already (with no apci)
• I have yet to figure out if it relies on these kernel enhancements for OS level virtualization
• The current implementation should probably be seen as a preview, Fraser Campbell reports that it was “decidedly slow” when he tried it.