src/hotspot/share/runtime/arguments.cpp

@@ -3763,10 +3763,16 @@
      }
    }
    if (UseCompactObjectHeaders && !UseCompressedClassPointers) {
      FLAG_SET_DEFAULT(UseCompressedClassPointers, true);
    }
+   if (UseCompactObjectHeaders && FLAG_IS_DEFAULT(hashCode)) {
+     hashCode = 6;
+   }
+   if (UseCompactObjectHeaders && FLAG_IS_DEFAULT(CompressedClassSpaceSize)) {
+     FLAG_SET_DEFAULT(CompressedClassSpaceSize, CompressedKlassPointers::max_klass_range_size_coh);
+   }
  #endif
  }
  
  jint Arguments::apply_ergo() {
    // Set flags based on ergonomics.