--- a/hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/freeChunk.cpp	Wed Dec 16 15:12:51 2009 -0800
+++ b/hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/freeChunk.cpp	Wed Dec 23 09:23:54 2009 -0800
@@ -67,3 +67,8 @@
   }
 }
 #endif
+
+void FreeChunk::print_on(outputStream* st) {
+  st->print_cr("Next: " PTR_FORMAT " Prev: " PTR_FORMAT " %s",
+    next(), prev(), cantCoalesce() ? "[can't coalesce]" : "");
+}