On Sun, 04 Jan 2009 10:10:29 -0800, Darren New wrote:

> Xen is an OS

I don't know that I'd agree with that.  A hypervisor is a hardware 
abstraction layer, messing about with the various memory rings in the 
system in order to make the OS running within the hypervisor believe it's 
running in Ring 0 when it's not in order to take advantage of memory 
protection features in the hardware without tripping the native hardware 
up when a child domain bombs out.

Jim

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