Changeset 9291:bf83c9f5d8c0
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Mem: Use deque instead of list for bus retries

This patch changes the data structure used to keep track of ports that
should be told to retry. As the bus is doing this in an FCFS way,
there is no point having a list. A deque is a better match (and is at
least in theory a better choice from a performance point of view).

util/regress all passing (disregarding t1000 and eio)