Monitoring a data structure in a virtual machine and determining if memory pages containing the data structure are swapped into or out of guest physical memory
US8271450B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2009 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | May 27, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2101
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for monitoring a data structure maintained by guest software within a virtual machine is disclosed. Changes to the contents of the data structure are determined, such as by placing write traces on the memory pages containing the data structure. Also, the method involves determining when memory pages containing the data structure are swapped into and/or out of guest physical memory by the guest software, such as by placing write traces on the memory pages containing the guest page table and detecting changes to the present bit of page table entries involved in mapping virtual addresses for the data structure. Information about the contents of the data structure is retained while memory pages containing the data structure are swapped out of guest physical memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.