Virtual memory system with page table space separating a private

Details Virtual memory system with page table space separating a private Virtual memory system with page table space separating a private

1996-05-03

2000-05-09

Chan, Eddie P.

Electrical computers and digital processing systems: memory

Address formation

Address mapping

711209, G06F 1208

Patent

active

06061773&

ABSTRACT:
A virtual memory system includes a virtual address space including a process private space, a shared space, and a page table space located between the process private space and the shared space. The page table space includes page table entries mapping both the process private space and the shared space to physical memory. The page table entries might include a set of virtually contiguous process private page table entries adjacent to the process private space, and a set of virtually contiguous shared page table entries adjacent to the shared space. The process private space may include virtual addresses on a first side of a private/shared virtual address boundary, and the shared space includes virtual addresses on a second side of the private/shared virtual address boundary. The set of virtually contiguous process private page table entries is located on the first side of the private/shared virtual address boundary, and the set of virtually contiguous shared page table entries is located on the second side of the private/shared virtual address boundary. The system includes means to minimize translation buffer invalidations and page faults.

REFERENCES:
patent: 4356549 (1982-10-01), Chueh
patent: 4985825 (1991-01-01), Webb, Jr. et al.
patent: 4991082 (1991-02-01), Yoshizawa et al.
patent: 5349651 (1994-09-01), Hetherington et al.
patent: 5652854 (1997-07-01), Wong

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