Electrical computers and digital processing systems: memory – Address formation – Address mapping
Reexamination Certificate
2011-07-19
2011-07-19
Krofcheck, Michael C (Department: 2186)
Electrical computers and digital processing systems: memory
Address formation
Address mapping
C711S006000, C711SE12001, C711SE12059
Reexamination Certificate
active
07984264
ABSTRACT:
For a virtual memory of a virtualized computer system in which a virtual page is mapped to a guest physical page which is backed by a machine page and in which a shadow page table entry directly maps the virtual page to the machine page, reverse mappings of guest physical pages are optimized by removing the reverse mappings of certain immutable guest physical pages. An immutable guest physical memory page is identified, and existing reverse mappings corresponding to the immutable guest physical page are removed. New reverse mappings corresponding to the identified immutable guest physical page are no longer added.
REFERENCES:
patent: 6789156 (2004-09-01), Waldspurger
patent: 2005/0172098 (2005-08-01), Worley
patent: 2005/0188374 (2005-08-01), Magenheimer
patent: 2006/0206658 (2006-09-01), Hendel et al.
patent: 2006/0259734 (2006-11-01), Sheu et al.
Waldspurger, Carl. “Memory Resource Management in VMware ESX Server,” Dec. 2002, Fifth Symposium on Operating Systems Design and Implementation, pp. 1-14.
Smith Garrett
Subrahmanyam Pratap
Krofcheck Michael C
VMware, Inc.
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