主权项 |
1. An apparatus comprising:
a memory controller to:
receive a request over a link, wherein the request requests a particular line in memory;identify a directory state record in memory, wherein the directory state record identifies a directory state of the particular line;identify, from the request, a type of the request;determine that the directory state of the particular line is to change from the particular state to a new state based on the request, wherein the change is to be determined from the directory state of the particular line and the type of the request; andchange the directory state record, in response to receipt of the request, to reflect the new state; and logic to send a copy of the particular line in response to the request. |