--- old/src/share/vm/runtime/os.cpp	2016-01-05 16:57:50.503575287 -0500
+++ new/src/share/vm/runtime/os.cpp	2016-01-05 16:57:49.667528294 -0500
@@ -1619,7 +1619,7 @@
 bool os::unmap_memory(char *addr, size_t bytes) {
   bool result;
   if (MemTracker::tracking_level() > NMT_minimal) {
-    Tracker tkr = MemTracker::get_virtual_memory_release_tracker();
+    Tracker tkr = MemTracker::get_virtual_memory_uncommit_tracker();
     result = pd_unmap_memory(addr, bytes);
     if (result) {
       tkr.record((address)addr, bytes);