diff -r ae1579717a57 -r 7ea5ca260b28 src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp
--- a/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp	Sat Mar 07 11:07:37 2009 -0500
+++ b/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp	Sat Mar 07 11:07:37 2009 -0500
@@ -2332,7 +2332,6 @@
 void
 G1CollectedHeap::checkConcurrentMark() {
     VerifyMarkedObjsClosure verifycl(this);
-    doConcurrentMark();
     //    MutexLockerEx x(getMarkBitMapLock(),
     //              Mutex::_no_safepoint_check_flag);
     object_iterate(&verifycl);