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Content-based swap candidate selection

  • US 9,342,344 B2
  • Filed: 04/16/2014
  • Issued: 05/17/2016
  • Est. Priority Date: 04/16/2014
  • Status: Active Grant
First Claim
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1. A method for building a list of swap candidate pages for host swapping, the method comprising:

  • determining, by a host system, a swap target virtual machine (VM) and a target number of swap candidate pages, wherein the swap target VM is a VM running on the host system that a hypervisor of the host system has determined to be a target for host swapping, and wherein the swap candidate pages are memory pages in a memory space of the swap target VM that the hypervisor will attempt to swap to disk when host swapping is initiated;

    selecting, by the host system, a memory page from the memory space of the swap target VM;

    checking, by the host system, whether the memory page is sharable or compressible; and

    adding, by the host system, the memory page to the list of swap candidate pages if the memory page is sharable or compressible.

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