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:
Aug. 09, 2011
Filed:
Sep. 09, 2005
Janet R. Easton, Woodstock, NY (US);
Elke Nass, Ehningen, DE;
Kenneth J. Oakes, Wappingers Falls, NY (US);
Andrew W. Piechowski, Lagrangeville, NY (US);
Martin Taubert, Gaertringen, DE;
John S. Trotter, Pleasant Valley, NY (US);
Ambrose Verdibello, Millbrook, NY (US);
Joachim Von Buttlar, Schoenaich, DE;
Robert Whalen, Jr., Tivoli, NY (US);
Janet R. Easton, Woodstock, NY (US);
Elke Nass, Ehningen, DE;
Kenneth J. Oakes, Wappingers Falls, NY (US);
Andrew W. Piechowski, Lagrangeville, NY (US);
Martin Taubert, Gaertringen, DE;
John S. Trotter, Pleasant Valley, NY (US);
Ambrose Verdibello, Millbrook, NY (US);
Joachim von Buttlar, Schoenaich, DE;
Robert Whalen, Jr., Tivoli, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Disclosed are a method and system of tracking real time use of I/O control blocks on a processing unit basis, in a multiprocessing system, such that in the case of a processing unit failure, a list accurately and concisely identifies the control blocks that need to be recovered. This eliminates the need to scan all the I/O control blocks, greatly reducing the overall system recovery time and minimizing impact to the rest of the running system. The preferred embodiment of the invention uses a task control block structure to record which I/O control blocks are in use by each Processing Unit. Also, the lock word structure defined in the I/O control blocks is provided with an index back into the task control block to facilitate managing the task control block entries.