diff -r c61257b7c7b6 -r 24c75d495b2f hotspot/src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp
--- a/hotspot/src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp	Wed Apr 25 15:51:10 2012 -0700
+++ b/hotspot/src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp	Wed Apr 25 12:36:37 2012 +0200
@@ -886,8 +886,9 @@
                                                       size_t start_used) {
   if (G1Log::finer()) {
     gclog_or_tty->stamp(PrintGCTimeStamps);
-    gclog_or_tty->print("[GC pause");
-    gclog_or_tty->print(" (%s)", gcs_are_young() ? "young" : "mixed");
+    gclog_or_tty->print("[GC pause (%s) (%s)",
+      GCCause::to_string(_g1->gc_cause()),
+      gcs_are_young() ? "young" : "mixed");
   }
 
   // We only need to do this here as the policy will only be applied