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:
Aug. 11, 2009
Filed:
Apr. 30, 2004
Ulfar Erlingsson, San Francisco, CA (US);
Edward P. Wobber, Menlo Park, CA (US);
Paul Barham, Cambridge, GB;
Thomas Roeder, Ithaca, NY (US);
Ulfar Erlingsson, San Francisco, CA (US);
Edward P. Wobber, Menlo Park, CA (US);
Paul Barham, Cambridge, GB;
Thomas Roeder, Ithaca, NY (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
Extensions to operating systems or software applications can be hosted in virtual environments to fault isolate the extension. The virtual environment in which extensions designed to control hardware devices can safely execute can be efficiently created during an initial startup sequence of a host environment by indicating to the host environment that a second processing unit is present in the computing system allowing the host environment to create a coherent state. A virtual process, especially a virtual operating system process running on a virtual machine, can be efficiently started by the created coherent state. A coherent state can be created when an operating system starts up and the appropriate parameters are observed and saved. Alternatively, an operating system of the host environment can create the coherent state by receiving indication of the second processing unit during the boot process.