Virtual address write back cache with address reassignment...

Details Virtual address write back cache with address reassignment... Virtual address write back cache with address reassignment...

G - Physics

06

F

354/230

G06F 12/08 (2006.01) G06F 12/10 (2006.01)

Patent

CA 1305800

ABSTRACT OF THE DISCLOSURE Hardware and software improvements in workstations which utilize virtual addressing in multi-user operating systems with write back caches, including operating systems which allow each user to have multiple active processes. In virtual addressing, multi-user workstations, system performance may be improved significantly by including a virtual address write back cache as one of the system elements. The present invention describes an efficient scheme for supporting data protection and the reassignment of virtual addresses within such a system. The invention features support for multiple active processes, each with its own virtual address space, and an operating system shared by those processes in a manner which is invisible to user programs. Cache "Flush" logic is used to remove selected blocks from the virtual cache when virtual addresses are to be reassigned.

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