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Method to prevent machine checkstop during I/O subsystem failure analysis from machine check interrupt handler and greatly enhance machine failure recovery

IP.com Disclosure Number: IPCOM000016490D
Original Publication Date: 2003-Jun-25
Included in the Prior Art Database: 2003-Jun-25

Publishing Venue

IBM

Abstract

In the current generation of GP, GQ, and GR processors, I/O load failures may be signaled to the processor by a machine check interrupt. Under certain conditions a second machine check can occur while processing the first which will cause a check stop resulting in the crash of the entire machine. This is an extremely undesirable event.