http://cr.openjdk.java.net/~shade/shenandoah/backports/jdk9-20171120/webrev.01/
Important performance changes:
rev 13743 : [backport] Passive should opt-in the barriers, not opt-out
rev 13744 : [backport] Enable biased locking for Shenandoah by default
Testing: hotspot_gc_shenandoah {fastdebug|release}
Thanks,
-Aleksey