--- old/src/share/vm/gc/shared/collectorPolicy.cpp	2016-06-21 21:14:03.000000000 +0200
+++ new/src/share/vm/gc/shared/collectorPolicy.cpp	2016-06-21 21:14:02.000000000 +0200
@@ -285,7 +285,7 @@
          "heap_alignment: " SIZE_FORMAT " not aligned by gen_alignment: " SIZE_FORMAT,
          _heap_alignment, _gen_alignment);
 
-  // All generational heaps have a youngest gen; handle those flags here
+  // All generational heaps have a young gen; handle those flags here
 
   // Make sure the heap is large enough for two generations
   size_t smallest_new_size = young_gen_size_lower_bound();
@@ -307,7 +307,7 @@
   // Make sure NewSize allows an old generation to fit even if set on the command line
   if (FLAG_IS_CMDLINE(NewSize) && NewSize >= _initial_heap_byte_size) {
     log_warning(gc, ergo)("NewSize was set larger than initial heap size, will use initial heap size.");
-    NewSize = bound_minus_alignment(NewSize, _initial_heap_byte_size);
+    FLAG_SET_ERGO(size_t, NewSize, bound_minus_alignment(NewSize, _initial_heap_byte_size));
   }
 
   // Now take the actual NewSize into account. We will silently increase NewSize
@@ -315,10 +315,7 @@
   size_t bounded_new_size = bound_minus_alignment(NewSize, MaxHeapSize);
   bounded_new_size = MAX2(smallest_new_size, (size_t)align_size_down(bounded_new_size, _gen_alignment));
   if (bounded_new_size != NewSize) {
-    // Do not use FLAG_SET_ERGO to update NewSize here, since this will override
-    // if NewSize was set on the command line or not. This information is needed
-    // later when setting the initial and minimum young generation size.
-    NewSize = bounded_new_size;
+    FLAG_SET_ERGO(size_t, NewSize, bounded_new_size);
   }
   _min_young_size = smallest_new_size;
   _initial_young_size = NewSize;
@@ -361,11 +358,11 @@
     vm_exit_during_initialization("Invalid young gen ratio specified");
   }
 
-  OldSize = MAX2(OldSize, old_gen_size_lower_bound());
+  if (OldSize < old_gen_size_lower_bound()) {
+    FLAG_SET_ERGO(size_t, OldSize, old_gen_size_lower_bound());
+  }
   if (!is_size_aligned(OldSize, _gen_alignment)) {
-    // Setting OldSize directly to preserve information about the possible
-    // setting of OldSize on the command line.
-    OldSize = align_size_down(OldSize, _gen_alignment);
+    FLAG_SET_ERGO(size_t, OldSize, align_size_down(OldSize, _gen_alignment));
   }
 
   if (FLAG_IS_CMDLINE(OldSize) && FLAG_IS_DEFAULT(MaxHeapSize)) {