1. A data processing system, comprising: a data handling device, comprising: a data requestor endpoint configured for originating first packet requests for transmission on a first packetized memory link to a first memory device; and a data handling endpoint configured for: interpreting second packet requests received by the data handling endpoint on a second packetized memory link from at least one additional data handling device; and conveying data bidirectionally across the second packetized memory link to and from the at least one additional data handling device in response to the second packet requests; wherein the first packetized memory link and the second packetized memory link are separate but include a same type of link protocol and a same type of physical interface.