Cache: Fix an issue with LRU when bonus block is used to complete transaction.

The block is never inserted because it's the one extra block in the cache, but
it can be invalidated twice in a row. In that case the block doesn't have a
new master id (beacuse it was never inserted), however it is valid and
the accounting goes wrong at that point.

diff --git a/src/mem/cache/cache_impl.hh b/src/mem/cache/cache_impl.hh
index 40359d31e753df4dbfcc5f7d0221cec68d4a20ce..024ae32973e300155755a206d36dd13a3363dfe6 100644 (file)
--- a/src/mem/cache/cache_impl.hh
+++ b/src/mem/cache/cache_impl.hh
@@ -994,6 +994,7 @@ Cache<TagStore>::handleResponse(PacketPtr pkt)
         if (blk->isDirty()) {
             allocateWriteBuffer(writebackBlk(blk), time, true);
         }
+        blk->status &= ~BlkValid;
         tags->invalidateBlk(blk);
     }