Memory duplication by destination host in virtual machine live migration

摘要

Systems and methods for memory de-duplication in a virtual machine undergoing live migration. An example method may comprise: receiving, by a hypervisor executing on a destination host computer system, a first virtual address and a corresponding physical memory range identifier, the physical memory range identifier identifying a first physical memory range on an origin host computer system, the first virtual address identifying a first virtual memory range mapped to the first physical memory range in a virtual address space of a first virtual machine undergoing live migration from the origin host computer system to the destination host computer system; identifying a second virtual address corresponding to the physical memory range identifier, the second virtual address identifying a second virtual memory range in a virtual address space of a second virtual machine undergoing live migration from the origin host computer system to the destination host computer system; identifying a destination physical address corresponding to the second virtual address, the destination physical address identifying a second physical memory range on the destination host computer system; and mapping, on the destination host computer system, the first virtual address to the destination physical address.