Hi everyone, Can somebody please tell me the  difference between mostly_excl and strictly-exclusive? I know that if a cache is mostly_excl of caches above, (1)it will not allocate block when recvTimingResp and then respond a miss request from the cache above. And I also know that the(2) cache above the mostly_excl needs to set  writeback_clean so that when a blk gets evicted from the upper cache, the mostly_excl lower cache can store the evicted blk. Besides, (3)according to the access() function, I notice that a mostly_excl cache will invalidate corresponding cache blk when respond a blk that is in this level but not in the above cache, by calling maintainClusivity. The problem is, it seems like a mostly_excl cache behaves the same as a strictly-exclusive cache according to (1) to (3). Can anyone shed any light on it? Best, Yongjie