/* a reconstruction event descriptor. The event types currently are: * RF_REVENT_READDONE -- a read operation has completed * RF_REVENT_WRITEDONE -- a write operation has completed * RF_REVENT_BUFREADY -- the buffer manager has produced a full buffer * RF_REVENT_BLOCKCLEAR -- a reconstruction blockage has been cleared * RF_REVENT_BUFCLEAR -- the buffer manager has released a process blocked on submission * RF_REVENT_SKIP -- we need to skip the current RU and go on to the next one, typ. b/c we found recon forced * RF_REVENT_FORCEDREADONE- a forced-reconstructoin read operation has completed */