Nutanix, Inc.

Florian Anselm Johannes Schmidt

Carl Alan Waldspurger

Jonathan James Davies

Felipe Franciosi

Ivan Teterevkov

Christopher Joel Riches

In some aspects, a non-transitory computer readable storage medium includes instructions stored thereon that, when executed by a processor, cause the processor to detect that system software is proceeding to swap memory content of a virtual machine (VM) from memory to storage, wherein the memory is allocated to the VM; buffer the memory content; and perform alternative memory reclamation of the memory.

VM memory reclamation by buffering hypervisor-swapped pages

In some aspects, a non-transitory computer readable storage medium includes instructions stored thereon that, when executed by a processor, cause the processor to create a virtual swap space that is exposed to a core system software, intercept a first page selected by the core system software to be swapped out to the virtual swap space, map the virtual swap space to a physical swap space that is allocated to a type of page associated with first swap metadata, and write the first page to the physical swap space based on the first page having the first swap metadata. In some embodiments, the first page is associated with the first swap metadata.

Systems and methods for transparent swap-space virtualization

Various embodiments disclosed herein are related to a non-transitory computer readable storage medium. In some embodiments, the medium includes instructions stored thereon that, when executed by a processor, cause the processor to receive, from a user-space application, a request to detect swapping activity satisfying a threshold condition, detect the swapping activity satisfying the threshold condition, and, in response to occurrence of the threshold condition, send a response that indicates that the swapping activity satisfies the threshold condition.

Early event-based notification for VM swapping

Various embodiments disclosed herein are related to a non-transitory computer readable storage medium. In some embodiments, the medium includes instructions stored thereon that, when executed by a processor, cause the processor to send an indication of a first storage location to a destination host. In some embodiments, the first storage location includes content that is swapped out from a memory location in a source host. In some embodiments, the indication includes one or more of a logical address and a first physical address. In some embodiments, the medium includes instructions stored thereon that, when executed by a processor, cause the processor to map the logical address of the first storage location to a second physical address of a second storage location. In some embodiments, the destination host accesses the content of the first storage location.

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Cambridge, United Kingdom

Florian Anselm Johannes Schmidt