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Browse Prior Art Database

Multiprocessor Locking with a Bypass for Channel References

IP.com Disclosure Number: IPCOM000052149D
Original Publication Date: 1981-May-01
Included in the Prior Art Database: 2005-Feb-11

Publishing Venue

IBM

Related People

Authors:
Drimak, EG Dutton, PF Hicks, GL Sitler, WR [+details]

Abstract

In a multiprocessing system, it is sometimes necessary to prevent references by one processor to data that is currently being modified by another processor. For example, if a processor can retry the execution of an instruction due to a machine malfunction and, in so doing, restores data modified by that to its previous value, the changed data should not be visible to other processors until the successful conclusion of the instruction modifying that data.