05226143 is referenced by 123 patents and cites 13 patents.

A conditional broadcast or notification facility of a global lock manager is utilized to both serialize access to pages stored in local caches of counterpart processors in a distributed system and to ensure consistency among pages common to the caches. Exclusive use locks are obtained in advance of all write operations. When a page is to be updated, which page is cached in a processor other than that of the requester, then a delay is posed to the grant of the exclusive lock, all shared use lock holders to the same page notified, local copies are invalidated, exclusive lock granted, page is updated and written through cache, after which the lock is demoted to shared use.

Title
Multiprocessor system includes operating system for notifying only those cache managers who are holders of shared locks on a designated page by global lock manager
Application Number
7/493581
Publication Number
5226143
Application Date
March 14, 1990
Publication Date
July 6, 1993
Inventor
William H Tetzlaff
Mount Kisco
NY, US
James J Myers
San Francisco
CA, US
Alexander S Lett
Mahopac
NY, US
Gerald P Bozman
Oakland
NJ, US
Robert Baird
San Jose
CA, US
Agent
R Bruce Brodie
Assignee
International Business Machines Corporation
NY, US
IPC
G06F 15/16
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