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

Details Method and means for sharing I/O resources by a plurality of ope Method and means for sharing I/O resources by a plurality of ope

1992-06-15

1995-05-09

Kriess, Kevin A.

Boots, shoes, and leggings

395275, 364DIG1, 364280, 3642816, 3642813, G06F 300

Patent

active

054148510

ABSTRACT:
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.

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patent: 5297262 (1994-03-01), Cox et al.

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