The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 17, 2015
Filed:
Apr. 16, 2012
Alexander Thomas Garthwaite, Beverly, MA (US);
Maxime Austruy, Sainte-Sulpice, CH;
Kapil Arya, Boston, MA (US);
Alexander Thomas Garthwaite, Beverly, MA (US);
Maxime Austruy, Sainte-Sulpice, CH;
Kapil Arya, Boston, MA (US);
VMware, Inc., Palo Alto, CA (US);
Abstract
In a virtual machine, swap activities of a hypervisor and a guest OS are reconciled so that redundant input-output operations (IOs) can be avoided and a synchronous response time of the virtual machine improved. This is achieved with a map of memory pages to blocks of storage. For a write IO to write contents of a memory page into a target block, the map is examined to see if it contains a valid entry for the memory page. If the map contains the valid entry, the write IO is prevented from being issued and a data structure is updated so that subsequent IOs to the target block is redirected from the target block to a block that is associated with the physical memory page in the valid entry. On the other hand, if the map does not contain the valid entry, the write IO is issued.