System and method for maintaining in a multi-processor...

Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability

Reexamination Certificate

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Reexamination Certificate

active

07366948

ABSTRACT:
According to one embodiment, a method comprises assigning a first processor of a multi-processor system a role of spare processor for at least a second processor, and responsive to detecting loss of lockstep (LOL) for any of the at least a second processor, the first processor replaces the processor for which the LOL is detected. The method further comprises reestablishing lockstep for the processor for which the LOL is detected, and assigning the processor having its lockstep reestablished the role of spare processor for at least the first processor.

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Microsoft Computer Dictionary, 4th Ed. Microsoft Press, 1999, p. 313.
“System and Method for Using Information Relating to a Detected Loss of Lockstep for Determining a Responsive Action”.
“System and Method for Establishing a Spare Processor for Recovering From Loss of Lockstep in a Boot Processor”.
“System and Method for Configuring Lockstep Mode of a Processor Module”.
“System and Method for Providing Firmware Recoverable Lockstep Protection”.
“System and Method for Switching the Role of Boot Processor to a Spare Processor Responsive to Detection of Loss of Lockstep in a Boot Processor”.
“System and Method for Reestablishing Lockstep for a Processor Module for Which Loss of Lockstep is Detected”.
“System and Method for System Firmware Causing an Operating System to Idle a Processor”.
“System and Method for Reintroducing a Processor Module to an Operating System After Lockstep Recovery”.

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