--- old/src/share/vm/gc/g1/g1CollectorPolicy.cpp	2016-03-10 10:49:13.592014134 +0100
+++ new/src/share/vm/gc/g1/g1CollectorPolicy.cpp	2016-03-10 10:49:13.460014128 +0100
@@ -241,14 +241,8 @@
          "if a user set it to 0");
   _gc_overhead_perc = 100.0 * (1.0 / (1.0 + GCTimeRatio));
 
-  uintx reserve_perc = G1ReservePercent;
-  // Put an artificial ceiling on this so that it's not set to a silly value.
-  if (reserve_perc > 50) {
-    reserve_perc = 50;
-    warning("G1ReservePercent is set to a value that is too large, "
-            "it's been updated to " UINTX_FORMAT, reserve_perc);
-  }
-  _reserve_factor = (double) reserve_perc / 100.0;
+  guarantee(G1ReservePercent <= 50, "Range checking should not allow values over 50.");
+  _reserve_factor = (double) G1ReservePercent / 100.0;
   // This will be set when the heap is expanded
   // for the first time during initialization.
   _reserve_regions = 0;