Hi all, this patch removes the unused file g1ParScanThreadState_ext.cpp and also all the mechanics involved with using these extension points. Issue: https://bugs.openjdk.java.net/browse/JDK-8197847 Patch: http://cr.openjdk.java.net/~ehelin/8197847/00/ Testing: - make run-test-tier1 on Linux x86-64 Thanks, Erik