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. 15, 2015
Filed:
May. 10, 2012
Krzysztof Uchronski, Cambridge, GB;
Martin O'brien, Mountain View, CA (US);
Jacob Gorm Hansen, Ryomgaard, DK;
Kiran Bondalapati, Los Altos, CA (US);
Ian Pratt, Cambridge, GB;
Gaurav Banga, Cupertino, CA (US);
Vikram Kapoor, Cupertino, CA (US);
Krzysztof Uchronski, Cambridge, GB;
Martin O'Brien, Mountain View, CA (US);
Jacob Gorm Hansen, Ryomgaard, DK;
Kiran Bondalapati, Los Altos, CA (US);
Ian Pratt, Cambridge, GB;
Gaurav Banga, Cupertino, CA (US);
Vikram Kapoor, Cupertino, CA (US);
Bromium, Inc., Cupertino, CA (US);
Abstract
Reducing an amount of memory used by a virtual machine. A system includes multiple virtual machines that share common pages of memory. The number of private pages associated with each virtual machine is minimized by ensuring that pages that a guest operating system regards as now free or zeroed are efficiently mapped by the hypervisor to a shared zero page. Upon a hypervisor determining that one or more guest physical frame numbers are assigned to free memory pages, the hypervisor updates mapping data to map the one or more guest physical frame numbers to a shared zero page within the machine frame.