Oracle International Corporation

Oracle America, Inc.

Robert W Wittosch

Brian Manula

Bjorn Dag Johnsen

Rabin Sugumar

Morten Schanke

Haakon Ording Bugge

William M Ortega

A method for deallocation of a memory region involving transmitting, by a host channel adapter (HCA), a first invalidation command for invalidating at least one key associated with the memory region, transmitting, by the HCA, a second invalidation command for invalidating a translation lookaside buffer (TLB) entry for the memory region, invalidate the at least one key associated with the memory region, determining whether all memory access requests to the memory region have been processed by the HCA, stalling processing of the second invalidation command when outstanding memory access requests to the memory region are present, and processing the outstanding memory access requests for the memory region by the HCA before executing the second invalidation command invalidating the TLB entry for the memory region.

Method and system for efficient memory region deallocation

A method for content addressable memory (CAM) error recovery that includes detecting an error in an entry of a CAM, identifying an address of the entry in the CAM, copying data from the address in the backup random access memory (RAM) into the entry of the CAM to obtain a corrected CAM, clearing a results (first in first out) FIFO structure based on detecting the error, performing, using the corrected CAM, a match request stored in a replay FIFO structure to obtain a revised result, and storing the revised result in the results FIFO structure.

CAM bit error recovery

A system comprising a compute node and coupled network adapter (NA) that allows the NA to directly use CPU virtual addresses without pinning pages in system memory. The NA performs memory accesses in response to requests from various sources. Each request source is assigned to context. Each context has a descriptor that controls the address translation performed by the NA. When the CPU wants to update translation information it sends a synchronization request to the NA that causes the NA to stop fetching a category of requests associated with the information update. The category may be requests associated with a context or a page address. Once the NA determines that all the fetched requests in the category have completed it notifies the CPU and the CPU performs the information update. Once the update is complete, the CPU clears the synchronization request and the NA starts fetching requests in the category.

Network use of virtual addresses without pinning or registration

Growing community of inventors

Duluth, GA, United States of America

Robert W Wittosch