Patents by Inventor Norman E. Shafa

Norman E. Shafa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for dynamically changing the configuration of a logically partitioned data processing system
    Patent number: 5253344
    Abstract: A request is made by a system in a first logical partition, within a logically partitioned data processing system, to dynamically change the I/O configuration of the host system in a way that affects a system in a second logical partition. The hypervisor intercepts the request, ensures the serialization of such dynamic I/O requests, and allows dynamic reconfiguration to proceed. Subsequently, the hypervisor determines the effect of the reconfiguration on the second partition, and notifies the second partition of the change.
    Type: Grant
    Filed: September 5, 1991
    Date of Patent: October 12, 1993
    Assignee: International Business Machines Corp.
    Inventors: James E. Bostick, Roger E. Hough, Suzanne M. John, Jeffrey P. Kubala, Karen M. Noonan, Norman E. Shafa, Ira G. Siegel