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:
Dec. 15, 2015
Filed:
Jun. 16, 2009
Vyacheslav Vladimirovich Malyugin, Los Gatos, CA (US);
Boris Weissman, Mountain View, CA (US);
Ganesh Venkitachalam, Mountain View, CA (US);
Min Xu, Palo Alto, CA (US);
Vyacheslav Vladimirovich Malyugin, Los Gatos, CA (US);
Boris Weissman, Mountain View, CA (US);
Ganesh Venkitachalam, Mountain View, CA (US);
Min Xu, Palo Alto, CA (US);
VMware, Inc., Palo Alto, CA (US);
Abstract
The translation lookaside buffer (TLB) of a processor is kept in synchronization with a guest page table by use of an indicator referred to as a 'T' bit. The T bit of the NPT/EPT entries mapping the guest page table are set when a page walk is performed on the NPT/EPT. When modifications are made to pages mapped by NPT/EPT entries with their T bit set, changes to the TLB are made so that the TLB remains in synchronization with the guest page table. Accordingly, record/replay of virtual machines of virtualized computer systems may be performed reliably with no non-determinism introduced by stale TLBs that fall out of synchronization with the guest page table.