Kernel error recovery disablement and shared recovery routine footprint areas
US7793149B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2007 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | Jul 14, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/44505
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method, computer program product, and data processing system for providing optional failure recovery features in operating system kernel code are disclosed. In accordance with a preferred embodiment, a segment of mainline code may designate a recovery routine for that segment by calling a kernel service provided for that purpose. The kernel service allocates a “footprint” region on the recovery stack for storing state information arising from the execution of the recovery-enabled code. In the event of an exception, a recovery manager routine uses information from the recovery stack to recover from the exception. Recovery may be disabled altogether for performance purposes by way of boot-time patching to disable the use of the recovery stack and to allow state information to be written to a static “scratchpad” area, which unlike the recovery stack, is allowed to be overwritten, its contents being ignored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.