Patent ID: 7805498

Claim:
An apparatus, in a system area network endnode, for modifying the operation of a host channel adapter, the apparatus comprising: an application memory space for an application; an operating system kernel memory space for an operating system; a host channel adapter; a queue pair associated with the application memory space; and a queue pair associated with the operating system kernel memory space, wherein the host channel adapter receives a marker message that is an immediate marker message that is interpreted by the host channel adapter, determines a type of the marker message, and responsive to a determination that the type of the marker message is a remote access redirect mode enable marker message, places the host channel adapter in a remote access redirect mode of operation, wherein the remote access redirect mode of operation converts memory access messages into receive messages, and wherein the remote access redirect mode of operation further causes memory access messages directed to the queue pair associated with the application memory space to be redirected to the queue pair associated with the operating system kernel memory space, and wherein the host channel adapter remains in a remote access redirect mode of operation until a remote access redirect mode disable marker message is received.