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Disclosed is the method for a Logical Partition (LPAR) to exchange a
licensed processor which fails and becomes bad at run-time with a good
unlicensed processor in the system without rebooting the partition or the
English (United States)
This text was extracted from a PDF file.
This is the abbreviated version, containing approximately
74% of the total text.
Page 1 of 1
Method To Exchange A Bad Licensed Processor With A Good Unlicensed Processor On Server Machines Equipped With Extra Processor Capacity
Service Processor configures all good processors and marks the quantity paid by
the customer as licensed processor. The extra processors are marked unlicensed and are put into the protected "instruction stop" mode by system firmware. If Service Processor run-time diagnostics detects and marks a licensed processor
bad, the hot-sparing process can be initiated by the operating system (OS) to replace the bad processor after the OS was informed through an event-scan error log. OS queries an unlicensed processor for exchange. If an unlicensed processor is
available, OS will be given a reserved drc-index for exchange. Each failing processor is exactly reserved one drc-index for exchange. Multiple indexes can be reserved when multiple failing processors are found. OS uses the given drc-index to start a CPU Dynamic LPAR operation for exchange.
The Hypervisor then calls the Service Processor to license an extra processor and moves it out of the "instruction stop" mode. The newly processor then goes to the available processor pool. The Hypervisor updates the record to associate the spared-in processor with the drc-index. When the Dynamic LPAR operation is successfully completed, the OS can start using the new spared-in processor. OS now must give up a bad processor by sending it back to the Hypervisor. The