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:
Mar. 01, 2011
Filed:
Feb. 14, 2008
Mark P. Bendyk, Hyde Park, NY (US);
Daniel F. Casper, Poughkeepsie, NY (US);
John R. Flanagan, Poughkeepsie, NY (US);
Roger G. Hathorn, Tucson, AZ (US);
Catherine C. Huang, Poughkeepsie, NY (US);
Matthew J. Kalos, Tucson, AZ (US);
Louis W. Ricci, Hyde Park, NY (US);
Gustav E. Sittmann, Webster Groves, MO (US);
Harry M. Yudenfriend, Poughkeepsie, NY (US);
Mark P. Bendyk, Hyde Park, NY (US);
Daniel F. Casper, Poughkeepsie, NY (US);
John R. Flanagan, Poughkeepsie, NY (US);
Roger G. Hathorn, Tucson, AZ (US);
Catherine C. Huang, Poughkeepsie, NY (US);
Matthew J. Kalos, Tucson, AZ (US);
Louis W. Ricci, Hyde Park, NY (US);
Gustav E. Sittmann, Webster Groves, MO (US);
Harry M. Yudenfriend, Poughkeepsie, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A computer program product, an apparatus, and a method for limiting a number of open exchanges at a channel subsystem of an I/O processing system using data from a control unit. The computer program product includes a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method that includes sending a command message to the control unit, and receiving a transport response information unit message in response. The method further includes extracting a maximum control unit exchange parameter from the transport response information unit message, and determining a limit value for a maximum number of open exchanges between the channel subsystem and the control unit as a function of the extracted maximum control unit exchange parameter. The method additionally includes applying the limit value to prevent opening of a new exchange.