--- old/src/hotspot/share/runtime/arguments.cpp	2017-11-09 13:05:53.924056650 +0100
+++ new/src/hotspot/share/runtime/arguments.cpp	2017-11-09 13:05:53.532044333 +0100
@@ -2008,13 +2008,6 @@
   } else if (UseG1GC) {
     set_g1_gc_flags();
   }
-  if (AssumeMP && !UseSerialGC) {
-    if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) {
-      warning("If the number of processors is expected to increase from one, then"
-              " you should configure the number of parallel GC threads appropriately"
-              " using -XX:ParallelGCThreads=N");
-    }
-  }
   if (MinHeapFreeRatio == 100) {
     // Keeping the heap 100% free is hard ;-) so limit it to 99%.
     FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99);