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Recovery from data fetch errors in hypervisor code

  • US 6,658,591 B1
  • Filed: 06/08/2000
  • Issued: 12/02/2003
  • Est. Priority Date: 06/08/2000
  • Status: Active Grant
First Claim
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1. A logically partitioned data processing system;

  • comprising;

    a plurality of processors, each of which assigned to one of a plurality of partitions; and

    a plurality of private data areas, each of which is assigned to one of the plurality of processors and each of the plurality of private data areas includes a primary copy of data and an alternate copy of data;

    wherein each of the plurality of processors is configured, during data fetch operations, to attempt to retrieve data from the primary copy of the data and, responsive to a failure to retrieve the data from the primary copy, attempting to retrieve the data from the alternate copy of the data; and

    each of the plurality of processors is configured, responsive to a failure of a write operation to the primary copy of data, to copy data from the alternate copy of the data into the primary copy of the data and re-attempt the write operation.

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