Host address space identifier for non-uniform memory access locality in virtual machines

A system comprising:

• a memory;
• and
• a processing device, coupled to the memory, to:
• detect a virtual machine (VM) access of a guest physical address (GPA), wherein the virtual machine comprises a set of virtual non-uniform memory access (NUMA) nodes, wherein each virtual NUMA node comprises a set of set of virtual CPUs (vCPUs) and a set of guest memories, and maps to a corresponding physical host NUMA node;
• reference a NUMA node locality table using the GPA to determine a memory page and a virtual NUMA node associated with the GPA using a host address space identifier (HASID) that associates the GPA of the memory page with a corresponding virtual NUMA node locality;
• determine whether to migrate the memory page associated with the GPA to a host NUMA node corresponding to the virtual NUMA node;
• and
• create a new page table entry for the GPA in a host page table of the hypervisor, wherein the host page table maps the GPA of the memory page to a corresponding host physical address.

A non-transitory computer-readable storage medium including instructions that, when executed by a processing device of a host machine, cause the processing device to:

• determine, by a virtual machine (VM) executed by the processing device and managed by a hypervisor, wherein the virtual machine comprises a set of virtual non-uniform memory access (NUMA) nodes, wherein each virtual NUMA node comprises a set of set of virtual CPUs (vCPUs) and a set of guest memories, and wherein each virtual NUMA node individually maps to a corresponding physical host NUMA node, that a memory page of the guest is to be moved from a first virtual NUMA node of the VM to a second virtual NUMA node of the VM;
• reference a NUMA node locality table to identify an offset corresponding to the second virtual NUMA node using a host address space identifier (HASID) that associates a guest physical address (GPA) of the memory page with a corresponding virtual NUMA node locality;
• adjust the GPA of the memory page by the offset;
• store the adjusted address as the GPA for the memory page in a guest page table of the VM, wherein the guest page table maps the GPA of the memory page to a corresponding guest virtual address (GVA) of the VM;
• and
• access, by the VM, the adjusted address stored as the GPA for the memory page.