Mitigating eviction by maintaining mapping tables
US9104544B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 2012 |
| Grant date | Aug 11, 2015 |
| Priority date | — |
| Expiry date | Jan 12, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/651
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Mitigating eviction of the memory pages of virtualized machines. Upon detecting that a request to perform an I/O operation has been issued against a block stored a disk, a determination is made as to whether a pristine copy of the contents of the block is stored in memory. If a pristine copy of the contents of the block is stored in memory, then the request may be performed by updating mapping data that maps a page of memory to a location in memory at which the pristine copy is stored. In this way, the request is performed without performing the I/O operation against the block stored on disk. Various approaches for resharing memory, including memory of a template virtual machine, are discussed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.