Method and means for sharing I/O resources by a plurality of operating systems

Provides a method for increasing the connectivity of I/O resources to a multiplicity of operating systems (OSs) running in different resource partitions of a computer electronic complex (CEC) to obtain sharing of the I/O resources among the OSs of the CEC, including channels, subchannels (devices),...

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Bibliographische Detailangaben
Hauptverfasser:	HALMA, MARTEN J, FREDERICKS, KENNETH J, HOUGH, ROGER E, JOHN, SUZANNE M, BRICE, JR., FRANK W, ELLIOTT, JOSEPH C, GALBRAITH, ROBERT E, SACHS, MARTIN W, MERITT, ALLAN S, OAKES, WYMAN, LESLIE W, STUCKI, DAVID E, RATHJEN, JR., JOHN C, MALINOWSKI, PAUL A
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING PHYSICS
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Beschreibung
Zusammenfassung:	Provides a method for increasing the connectivity of I/O resources to a multiplicity of operating systems (OSs) running in different resource partitions of a computer electronic complex (CEC) to obtain sharing of the I/O resources among the OSs of the CEC, including channels, subchannels (devices), and control units (CUs). The invention provides image identifiers (IIDs) for assigning resources to the different OSs. Each shared I/O resource has a sharing set of control blocks (CBs) in which a respective CB is assigned to (and located by) a respective IID of one of the OSs. Each of the CBs in a sharing set provides a different image of the same I/O resource. The different CB images are independently set to different states by I/O operations for the different OSs, so that the OSs can independently share the same I/O resource.