src/share/vm/gc_implementation/g1/concurrentMark.cpp

@@ -479,13 +479,12 @@
   return MAX2((n_par_threads + 2) / 4, 1U);
 }
 
 ConcurrentMark::ConcurrentMark(G1CollectedHeap* g1h, ReservedSpace heap_rs) :
   _g1h(g1h),
-  _markBitMap1(MinObjAlignment - 1),
-  _markBitMap2(MinObjAlignment - 1),
-
+  _markBitMap1(log2_intptr(MinObjAlignment)),
+  _markBitMap2(log2_intptr(MinObjAlignment)),
   _parallel_marking_threads(0),
   _max_parallel_marking_threads(0),
   _sleep_factor(0.0),
   _marking_task_overhead(1.0),
   _cleanup_sleep_factor(0.0),