diff -r fde3feaaa4ed -r 7194eb9e8f19 src/hotspot/os/windows/os_windows.cpp
--- a/src/hotspot/os/windows/os_windows.cpp	Tue Mar 06 17:15:16 2018 -0500
+++ b/src/hotspot/os/windows/os_windows.cpp	Tue Mar 06 17:45:31 2018 -0500
@@ -363,25 +363,6 @@
   return sz;
 }
 
-size_t os::committed_stack_size(address bottom, size_t size) {
-  MEMORY_BASIC_INFORMATION minfo;
-  address top = bottom + size;
-  size_t committed_size = 0;
-
-  while (committed_size < size) {
-    // top is exclusive
-    VirtualQuery(top - 1, &minfo, sizeof(minfo));
-    if ((minfo.State & MEM_COMMIT) != 0) {
-      committed_size += minfo.RegionSize;
-      top -= minfo.RegionSize;
-    } else {
-      break;
-    }
-  }
-
-  return MIN2(committed_size, size);
-}
-
 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
   const struct tm* time_struct_ptr = localtime(clock);
   if (time_struct_ptr != NULL) {