src/hotspot/share/gc/g1/g1ConcurrentMarkThread.cpp

rev 49953 : imported patch 8201491-precleaning
rev 49954 : [mq]: 8201491-kbarrett-review

@@ -309,15 +309,13 @@
           if (_cm->has_aborted()) {
             break;
           }
 
           if (G1UseReferencePrecleaning) {
-            {
               G1ConcPhase p(G1ConcurrentPhase::PRECLEAN, this);
               _cm->preclean();
             }
-          }
 
           // Provide a control point before remark.
           {
             G1ConcPhaseManager p(G1ConcurrentPhase::BEFORE_REMARK, this);
           }