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Multi-zone relocation facility computer memory system

  • US 5,652,853 A
  • Filed: 05/31/1995
  • Issued: 07/29/1997
  • Est. Priority Date: 02/08/1993
  • Status: Expired due to Term
First Claim
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1. In a computer system with a main host memory and a plurality of logical guest processors, each of said logical guest processors assigned a zone in said host memory of contiguous address space defined by a zone origin and a zone limit, a method for dynamically reorganizing said main host memory by means of a control program, said method including the steps of:

  • activating a multi-zone facility to map for a first logical processor a first guest absolute address zone to at least two discontiguous segments of the main host memory address space, each of said discontiguous segments having a zone origin value and a zone limit value;

    removing from a second guest absolute address zone mapped for a second logical processor at least a part of its main host memory address space in one of said at least two discontiguous segments;

    blocking access to said part by said second logical processor; and

    issuing an instruction to increase the storage limit of said first logical processor after notification by an I/O subsystem response that new zone origin and zone limit values are in effect for said first logical processor.

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