The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 26, 2005
Filed:
Mar. 28, 2002
George John Dawkins, Austin, TX (US);
Prakash Vinodrai Desai, Round Rock, TX (US);
Van Hoa Lee, Cedar Park, TX (US);
Gordon D. Mcintosh, Austin, TX (US);
George John Dawkins, Austin, TX (US);
Prakash Vinodrai Desai, Round Rock, TX (US);
Van Hoa Lee, Cedar Park, TX (US);
Gordon D. McIntosh, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
In a computer system having a logical-partitioned server, each partition of the server is provided with its own separate lock and access corridor, in addition to a global lock. When the locking of a partition lock is followed by the locking of the global lock, the system is serialized. The partition locks are controlled by system firmware on behalf of an OS isolating each partition; however, the global lock is controlled by the system firmware to be unlocked independent of the lock/unlock status of the partition locks. In this manner, the ability or inability of an OS that issued a machine check interrupt to unlock its partition lock after the machine check analysis is complete is irrelevant; once the machine check analysis is complete, the system firmware unlocks the global lock, giving other partitions access to shared system resources to run their own machine checks.