1. A machine implemented method comprising: generating a data structure having an identifier of a graphics resource assigned to a physical memory location in video memory; and controlling access to the physical memory location in response to determining if a data within the physical memory location is in transition between video memory and system memory wherein a client application accesses memory in the system memory at least in part through a first virtual memory map and wherein the client application accesses memory in the video memory through a second virtual memory map at least when writing data from a processor, through a memory controller, to the video memory without writing the data to the system memory.