The global constants ZMaxHeapSize, ZMaxHeapSizeShift and their respective platform versions can be removed. The single case where ZMaxHeapSize is used can be replaced by ZAddressOffsetMax. Bug: https://bugs.openjdk.java.net/browse/JDK-8231825 Webrev: http://cr.openjdk.java.net/~pliden/8231825/webrev.0 /Per