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Practically speaking, QEMU needs a lot of OS functionality, such as scheduling, threading, virtual memory, and network, disk, and filesystem drivers, to be able
by jakogut 5y ago
Practically speaking, QEMU needs a lot of OS functionality, such as scheduling, threading, virtual memory, and network, disk, and filesystem drivers, to be able to function. Xen does have these, but so does Linux, and KVM just exposes hardware virtualization as a module from Linux.