Electrical computers and digital processing systems: memory – Storage accessing and control – Memory configuring
Patent
1994-09-09
1998-09-15
Swann, Tod R.
Electrical computers and digital processing systems: memory
Storage accessing and control
Memory configuring
711117, G06F 1200, G06F 1208
Patent
active
058095519
ABSTRACT:
A method, apparatus and article of manufacture for managing pages of virtual storage in a computer system by delaying the actual release of a page by the system after its release has been requested by a guest program of the system, resulting in pending page releases. Establishment of a pending page release results in an entry in a log of pending page release, leaving the page(s) allocated to the guest. The system can release pages in the log at any time. The guest can request cancellation of pending page releases, in which case the requested pages are removed from the log for reuse by the guest if they have not already been released by the system. Key setting, page clearing or formatting, and page validation or staging, are optional services which can be included in cancellation requests. Establishment and cancellation are preferably requested by the guest using the intercepted instruction DIAGNOSE, and are performed by a storage manager component of the host operating system. Cancellation of pending page release is requested using the DIAGNOSE instruction, although a dedicated machine instruction could be substituted. The system processes the log of pending page release requests to conventionally release the pending pages.
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International Business Machines - Corporation
King , Jr. Conley B.
Samodovitz Arthur J.
Swann Tod R.
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