Electrical computers and digital processing systems: multicomput – Computer network managing – Computer network access regulating
Reexamination Certificate
2011-05-31
2011-05-31
Wang, Liangche A (Department: 2447)
Electrical computers and digital processing systems: multicomput
Computer network managing
Computer network access regulating
C709S203000, C709S217000, C709S223000, C709S228000, C709S229000
Reexamination Certificate
active
07953854
ABSTRACT:
A method and apparatus for providing remote access redirect in a host channel adapter of a system area network are provided. The apparatus and method provide a mechanism by which a host channel adapter, in response to receiving a marker message, places selected channel(s) of the host channel adapter in a remote access redirect (RAR) mode of operation. During the RAR mode of operation, memory access messages received by the host channel adapter that are destined for portions of an application memory space marked as being protected are converted to RAR receive messages and redirected to a queue pair associated with an operating system rather than the queue pair for the application. The operating system is responsible for serializing access to application memory pages outside of the host channel adapter. The mechanisms of the present invention may be used to perform a checkpoint data integrity operation.
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Elnozahy Elmootazbellah Nabil
Walker Peter Anthony
International Business Machines - Corporation
Toub Libby Z.
Wang Liangche A
Yee & Associates P.C.
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