Eliding redundant copying for virtual machine migration
US10884790B1 · kind B1 · utility
7Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 2018 |
| Grant date | Jan 5, 2021 |
| Priority date | — |
| Expiry date | Dec 8, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/683
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods are provided to reduce the number of redundant copy operations performed as part of a live migration of a virtual machine executing a guest. While pre-copying for the live migration of the VM, the guest may continue to write to the pages. A hypervisor may clear the dirty pages and schedule the copy operations of the modified pages in a processing engine for copying to a target device. In one embodiment, before initiating the copy operation, the processing engine may check if the page has been modified again and omit the copy operation if the page has been modified again.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.