[ Thanks to An Anonymous Reader for
this link. ]
“Question: There are a lot of virtualization
technologies like VMware, Xen and QEMU other than UML. What are the
relative strengths of UML which would urge a person in choosing it
over its counterparts?“Jeff Dike: The reason varies according to the
technology that you’re comparing UML to. With qemu and other
instruction emulators, the attraction is speed. These let you boot
a kernel on a machine with a different architecture, i.e. a ppc
kernel on an i386 host. When the architecture of the virtual
machine is the same as the host, there are few reasons to take the
overhead of instruction emulation, even if the emulator is
optimized in this case to just virtualize instructions…”