Nothing is being done with the Cache Notify Mask

[seldridge]

This is necessary to cover the case of multiple notifications to Transaction Table entries that the same cache entry has been loaded from memory.

[seldridge]

This should be exposed with @ceinstein's dana-benchmark test, specifically if you start two transactions with the same configuration at the same time. One of the transactions should get stuck waiting for the cache to respond (and it will only, currently, respond to one transaction).