A WAIT_REG_MEM passes when the label history holds a store recorded after
the wait's submission entered the driver with a value the compare accepts
(storedSince). A title that resets a label right after each wait on it,
with several submissions of the waiting queue queued at once (each waiting
for the label at its start), had all of those waits released by one store
of the other queue: after the first wait took it and the queue reset the
label, the history still held the store, newer than the later submissions.
Each queue now notes when a wait of it on a dword passed and, when it then
stores to that dword itself, that a store of another queue recorded before
the pass was taken: such a store no longer releases the queue's later waits
on those bytes. Stores the queue makes itself, and the other routes (memory,
the pending-label table, held at submit), are unchanged.
hugodearaujo
5e06fd0776