US Patent 7840765 RDMA copy-on-write

In an embodiment of the invention, an apparatus and method for Remote Direct Access Memory (RDMA) copy-on-write perform the steps including: marking a page of a first application as copy-on-write when the first application and a second application share the page, and exposing the page via RDMA protocol to a remote application; in response to a write access message to the page from the remote application, dropping the write access message; and stalling the first application while a copy-on-write processing is pending, in response to the write access message to the page from the remote application.