legion: Use best_affinity first to find the target memory of UntypedDeferredValue
legion: Use best_affinity first to find the target memory of UntypedDeferredValue

StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion