--- old/src/hotspot/share/gc/parallel/psParallelCompact.cpp	2018-04-17 15:16:27.891708406 +0200
+++ new/src/hotspot/share/gc/parallel/psParallelCompact.cpp	2018-04-17 15:16:27.620700069 +0200
@@ -845,13 +845,13 @@
   ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
   MemRegion mr = heap->reserved_region();
   _ref_processor =
-    new ReferenceProcessor(mr,            // span
-                           ParallelRefProcEnabled && (ParallelGCThreads > 1), // mt processing
-                           ParallelGCThreads, // mt processing degree
-                           true,              // mt discovery
-                           ParallelGCThreads, // mt discovery degree
-                           true,              // atomic_discovery
-                           &_is_alive_closure); // non-header is alive closure
+    new SpanReferenceProcessor(mr,            // span
+                               ParallelRefProcEnabled && (ParallelGCThreads > 1), // mt processing
+                               ParallelGCThreads, // mt processing degree
+                               true,              // mt discovery
+                               ParallelGCThreads, // mt discovery degree
+                               true,              // atomic_discovery
+                               &_is_alive_closure); // non-header is alive closure
   _counters = new CollectorCounters("PSParallelCompact", 1);
 
   // Initialize static fields in ParCompactionManager.