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:
Sep. 30, 2008
Filed:
Dec. 20, 2004
Robert S. Blackmore, Poughkeepsie, NY (US);
Piyush Chaudhary, Fishkill, NY (US);
Jason E. Goscinski, Snoqualmie, WA (US);
Leonard W. Helmer, Jr., Stone Ridge, NY (US);
John S. Houston, Hopewell Junction, NY (US);
Steven J. Martin, Poughkeepsie, NY (US);
Robert S. Blackmore, Poughkeepsie, NY (US);
Piyush Chaudhary, Fishkill, NY (US);
Jason E. Goscinski, Snoqualmie, WA (US);
Leonard W. Helmer, Jr., Stone Ridge, NY (US);
John S. Houston, Hopewell Junction, NY (US);
Steven J. Martin, Poughkeepsie, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
In remote direct memory access (RDMA) transfers in a multinode data processing system in which the nodes communicate with one another through communication adapters coupled to a switch or network, there is a need for the system to ensure efficient memory protection mechanisms across jobs. A method is thus desired for addressing virtual memory on local and remote servers that is independent of the process ID on the local and/or remote node. The use of global Translation Control Entry (TCE) tables that are accessed/owned by RDMA jobs and are managed by a device driver in conjunction with a Protocol Virtual Offset (PVO) address format solves this problem.