Virtual memory system having identity marking for common address

Details Virtual memory system having identity marking for common address Virtual memory system having identity marking for common address

1987-09-03

1988-07-12

Eng, David Y.

Boots, shoes, and leggings

G06F 1208, G06F 1210

Patent

active

047574470

ABSTRACT:
A data storage system includes a translation buffer for translating virtual page addresses to system page addresses, a data cache in which the data is identified by virtual address, and a mainstore in which data is stored by system address. When a new translation buffer entry is made which replaces an old translation buffer entry and both the old and the new translation buffer entries translate to the same system page address, then all data residing in the data cache identified by the virtual page address of the old translation buffer entry is allowed to match the virtual page address of the new translation buffer entry, and need not be evicted. This provides efficient handling of synonymous virtual addresses.

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patent: 4464712 (1984-08-01), Fletcher
Hogan, "Extended Translation Look-Aside Buffer", IBM Technical Disclosure Bulletin, vol. 19, #2, Jul. 1976, pp. 597-598.

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