Abstract: A method executed within a virtual machine (VM) host computer system. The method includes, during a pre-execution phase of a VM, mapping a physical address (PA)-backed range of the VM’s guest-physical memory pages to host-physical addresses (HPAs) within the system memory of the VM host and mapping a virtual-address (VA)-backed range of the VM’s guest-physical memory pages to host-virtual addresses (HVAs). The method also includes, during an execution phase of the VM, performing intercept processing when the VM accesses a guest-physical address (GPA) within the VA-backed range to map a corresponding HVA to an HPA. This method enables memory oversubscription of the VM by the VM host via the VA-backed memory range. At the same time, the method provides the VM with access to a PA-backed memory range that can be utilized without the potential performance penalties associated with using the VA-backed range.

Abstract: Techniques for implementing operating system layering are described herein. In one example, a method includes managing one or more container temporary storage spaces and one or more container runtime environments. Furthermore, the method includes loading, one or more drivers to provide compatibility between a container operating system and a host operating system, the one or more drivers comprising application program interface (API) compatibility libraries to enable API compatibility between the container operating system and the host operating system; metadata arbitration logic to enable compatibility between the container operating system and the host operating system by modifying container operating system references; and file arbitration logic to modify operating system file locations accessed by the container operating system and the host operating system.

Abstract: Techniques for implementing operating system layering are described herein. In one example, a method includes managing one or more container temporary storage spaces and one or more container runtime environments. Furthermore, the method includes loading, one or more drivers to provide compatibility between a container operating system and a host operating system, the one or more drivers comprising application program interface (API) compatibility libraries to enable API compatibility between the container operating system and the host operating system; metadata arbitration logic to enable compatibility between the container operating system and the host operating system by modifying container operating system references; and file arbitration logic to modify operating system file locations accessed by the container operating system and the host operating system.