This integrates latest Shenandoah changes from shenandoah/jdk8u repository. It's all backports from sh/jdk -> sh/jdk10 -> sh/jdk9 -> sh/jdk8u or jdk8u specific bugfixes. It's all been reviewed, baked and thoroughly tested upstream. With Aleksey's proposed changes, the differences between this integration and sh/jdk8u are only few whitespace changes. The integration brings lots of major and minor improvements, bugfixes and tests. The list of changesets to be pushed is this: http://cr.openjdk.java.net/~rkennke/jdk8u-shenandoah-integration-2018-03-22/... The complete webrev is: http://cr.openjdk.java.net/~rkennke/jdk8u-shenandoah-integration-2018-03-22/... It builds release+fastdebug, and passes all hotspot_gc_shenandoah tests. I'll tag the forest with: aarch64-shenandoah-jdk8u162-b12--shenandoah-merge-2018-03-22 ... after both Aleksey's change and this integration are pushed and merged.