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:
Nov. 12, 2013
Filed:
Apr. 25, 2012
James A. Rizzo, Austin, TX (US);
Robert L. Sheffield, Jr., Longmont, CO (US);
Rajeev Srinivasa Murthy, Bangalore, IN;
Naveen Krishnamurthy, Bangalore, IN;
James A. Rizzo, Austin, TX (US);
Robert L. Sheffield, Jr., Longmont, CO (US);
Rajeev Srinivasa Murthy, Bangalore, IN;
Naveen Krishnamurthy, Bangalore, IN;
LSI Corporation, Milpitas, CA (US);
Abstract
Methods and structure are disclosed for improved processing of fast path I/O requests in a storage controller utilizing version information embedded in the fast path I/O requests. The version information allows the storage controller to determine if the mapping information utilized by the host system in generating a fast path I/O request specifies the mapping information utilized by the storage controller. The controller comprises a fast path I/O request processing circuit tightly coupled with host system drivers for fast processing of requests directed to storage devices of a logical volume. The controller also comprises a logical volume I/O processing software stack for processing I/O requests from a host system directed to a logical volume. If the mapping information utilized by the host does not match the mapping information utilized by the storage controller, fast path I/O requests are transferred to the I/O request processing stack for subsequent processing.