System and method for providing shared memory using shared virtu

Details System and method for providing shared memory using shared virtu System and method for providing shared memory using shared virtu

1995-06-07

1999-08-17

Toplu, Lucien U.

Electrical computers and digital processing systems: memory

Address formation

Address mapping

G06F 1208

Patent

active

059408693

ABSTRACT:
A method and system for allowing multiple tasks to share virtual memory areas, in a memory management system for a computer, uses a data structure which maintains a list of address spaces shared by more than one task. For each entry in this list, a list of slots in virtual address space is maintained in the data structure, where each slot contains indications that said shared memory was mapped into a task. An offset table of directory pages is also maintained, and each entry in this directory points to a directory page for a task. The directory page entries for all of such directory pages points to a page table entry. An entry in each of the offset tables points to the entry in the list of shared address spaces for this set.

REFERENCES:
patent: 4356549 (1982-10-01), Chuett
patent: 4742450 (1988-05-01), Duvall et al.
patent: 4758951 (1988-07-01), Sznyter, III
patent: 5301288 (1994-04-01), Newman et al.

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