Method to automatically increase the segment size of file in a page segmented virtual memory data processing system
CA 1266533 C · Owner: Duvall, Keith E. · Inventors: Smith, Todd A.; Duvall, Keith E.; O'Quin, John C. Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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A method for automatically extending the size of a segment in a page segmented virtual memory data processing system. The method increases the size of a segment in blocks of 64K virtual pages in response to the system detecting that the requested page has been protected. The conventional UNIX type System Calls create and open files in virtual memory. All pages are protected "read only" until a SHMAT type System Call is made to operate on a page at a specific address. At that point in the process a, protection exception is recognized by the system and the UNIX kernel takes control to remove the protection and update the appropriate data structures to reflect the new status of the page and …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 6, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 6, 2007.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.