diff -r f040cf9fc9c0 -r 752ba2e5f6d0 src/share/vm/utilities/bitMap.cpp
--- a/src/share/vm/utilities/bitMap.cpp	Wed Feb 19 20:12:43 2014 -0800
+++ b/src/share/vm/utilities/bitMap.cpp	Tue Feb 25 15:11:18 2014 -0800
@@ -110,7 +110,7 @@
     while (true) {
       intptr_t res = Atomic::cmpxchg_ptr(nw, pw, w);
       if (res == w) break;
-      w  = *pw;
+      w  = res;
       nw = value ? (w | ~mr) : (w & mr);
     }
   }