src/hotspot/share/gc/g1/g1FromCardCache.cpp

rev 50098 : [mq]: 8202842-g1-footprint-regressions
rev 50099 : [mq]: 8202842-team-review

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -45,11 +45,13 @@
 #endif
   _cache = Padded2DArray<uintptr_t, mtGC>::create_unfreeable(_max_regions,
                                                              num_par_rem_sets,
                                                              &_static_mem_size);
 
+  if (AlwaysPreTouch) {
   invalidate(0, _max_regions);
+  }
 }
 
 void G1FromCardCache::invalidate(uint start_idx, size_t new_num_regions) {
   guarantee((size_t)start_idx + new_num_regions <= max_uintx,
             "Trying to invalidate beyond maximum region, from %u size " SIZE_FORMAT,