What is the name of the dynamic memory management system used by KVM (Kernel-based Virtual Machine)?

What is the name of the dynamic memory management system used by KVM (Kernel-based Virtual Machine)?

• Kernel-based Memory Deduplication
• Kernel-based Memory Optimization
• KVM Dynamic Page Consolidation
• Kernel Samepage Merging 

EXPLANATION

KSM (Kernel Samepage Merging) runs in the Linux kernel and scans the memory of all the virtual machines running on a single host, looking for duplication and consolidating said duplicates when found.
KSM is able to improve virtual machine density by as much as 300% without impacting performance. One of the great benefits of using Linux as the hypervisor means KSM is not limited to KVM and virtual machines, but can also reduce memory pressure with normal Linux applications.

SOURCE

https://pve.proxmox.com/wiki/Dynamic_Memory_Management