Browse Prior Art Database

External Page Table Entry Extension

IP.com Disclosure Number: IPCOM000059813D
Original Publication Date: 1986-Jan-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Miro, F: AUTHOR

Abstract

A method is described for use in a system for paging data between a memory and a mini disk.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

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External Page Table Entry Extension

A method is described for use in a system for paging data between a memory and a mini disk.

When a segment is mapped "write-new," the pages currently paged-out to the paging mini-disk(s) do not require an immediate page-in Input-Output (I/O) as part of the mapping.

An external page table entry (XPTE)-extension is pointed to from the parent or original XPTE. The XPTE-extension contains the new mapping for that page. The original XPTE retains the old mapping data with respect to the paging mini- disk(s). The need for immediate page-in I/O is eliminated since the new mapping is remembered without requiring destruction of the old mapping. The page-in I/O is saved until page fault time, after which the original XPTE is updated with data from its extension. The XPTE-extension is then discarded.

Disclosed anonymously.

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