METHOD AND APPARATUS FOR MANAGING SHARED VIRTUAL STORAGE

摘要

PROBLEM TO BE SOLVED: To manage a shared virtual storage in an information handling system having a virtual address space.

SOLUTION: A 64-bit virtual address space 202 requires up to five levels of dynamic address translation (DAT) tables 302. One or more shared ranges of virtual addresses 304 are mapped for each of a plurality of virtual address spaces 202 to a common set of real addresses 306. An operating system 106 manages these shared ranges using a system-level DAT table that references a shared set of DAT tables used by the sharing address spaces for address translation. The shared range of virtual addresses straddles the 242-byte boundary between ranges served by different third-level DAT tables and is situated between a lower private range and an upper private range so that an individual address space can map both the lower private range and a shared range using only three levels of DAT tables.

COPYRIGHT: (C)2007,JPO&INPIT