Page table management
US9218302B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2013 |
| Grant date | Dec 22, 2015 |
| Priority date | — |
| Expiry date | Dec 28, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/151
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Page table data for each page within a memory address space includes a write permission flag and a dirty-bit-modifier flag. The write permission flag is initialised to a value indicating that write access is not permitted. When a write access occurs, then the dirty-bit-modifier flag indicates whether or not the action of the write permission flag may be overridden. If the action of the write permission flag may be overridden, then the write access is permitted and the write permission flag is changed to indicate that write access is thereafter permitted. A page for which the write permission flag indicates that writes are permitted is a dirty page.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.