US Patent 10248325 Implied directory state updates

Memory is to store cache lines, where the cache lines include data and directory information to indicate a directory state of the corresponding cache line. A command is received from a processor over a link, the command including an address. The address is determined to correspond to a particular cache line and the particular cache line is identified to have a particular directory state from the corresponding directory information of the particular cache line. A type of the command is identified and a determination is made that that the directory state of the particular cache line is to change from the particular state to a new state based on the type of the command. The directory information of the particular cache line is changed to reflect the new state and a response is generated to the command.