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:
Sep. 01, 2020
Filed:
Dec. 13, 2017
Applicant:
Virtuozzo International Gmbh, Schaffhausen, CH;
Inventors:
Denis Lunev, Moscow, RU;
Alexey Kobets, Seattle, WA (US);
Assignee:
Virtuozzo International GmbH, Schaffhausen, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 9/00 (2006.01); G06F 9/455 (2018.01); G06F 12/1009 (2016.01); G06F 9/4401 (2018.01);
U.S. Cl.
CPC ...
G06F 9/45558 (2013.01); G06F 9/4401 (2013.01); G06F 9/45545 (2013.01); G06F 12/1009 (2013.01); G06F 2009/45583 (2013.01);
Abstract
A method for zeroing guest memory of a VM during boot up, includes the guest OS attempts to set a page to zero. A page fault is generated and is handled by the hypervisor. The page is mapped by the hypervisor to a page in host memory, and is given to the guest. The guest OS attempts to set the next page to zero. Another page fault is generated the hypervisor unmaps the host memory page, and the second page is mapped to the same page. The hypervisor then gives the page to the guest, which contains all zeros. The process is repeated for remaining pages of the guest memory.