diff -r a297b0e14605 -r 37552638d24a src/share/vm/gc_implementation/g1/concurrentMarkThread.cpp
--- a/src/share/vm/gc_implementation/g1/concurrentMarkThread.cpp	Mon Jun 04 09:21:53 2012 +0200
+++ b/src/share/vm/gc_implementation/g1/concurrentMarkThread.cpp	Tue Jun 05 22:30:24 2012 +0200
@@ -293,7 +293,7 @@
     // Java thread is waiting for a full GC to happen (e.g., it
     // called System.gc() with +ExplicitGCInvokesConcurrent).
     _sts.join();
-    g1h->increment_full_collections_completed(true /* concurrent */);
+    g1h->increment_old_marking_cycles_completed(true /* concurrent */);
     _sts.leave();
   }
   assert(_should_terminate, "just checking");