The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 1992
Filed:
Nov. 21, 1988
Kenneth G Rubsam, Poughkeepsie, NY (US);
Richard J Schmalz, Wappingers Falls, NY (US);
Eugene S Schulze, Wappingers Falls, NY (US);
International Business Machines Corp., Armonk, NY (US);
Abstract
A non-main storage data space (NMDS) is presented, whose virtual pages may be backed by expanded storage, by a combination of expanded and auxiliary storage, but not by main storage. Mechanisms are provided to prevent direct referencing of data in a NMDS by instructions, and to bring data into and out of NMDS's. The I/O mechanisms minimize physical I/O by exchanging pointers to backing pages in appropriate cases. Additionally, control is returned immediately to I/O-initiating applications, when I/O is required between an address space and a NMDS, without the need for synchronization by the application: the mechanism provides for synchronization by the system's page fault processing.