Reference.reachabilityFence

[mark.reinhold at oracle.com]

2015/11/23 8:38 -0800, paul.sandoz at oracle.com:
> Please review the addition of Reference.reachabilityFence contributed
> by Aleksey, Doug and myself:
> 
>   http://cr.openjdk.java.net/~psandoz/jdk9/JDK-8133348-reachability-fence-jdk/webrev/
>   http://cr.openjdk.java.net/~psandoz/jdk9/JDK-8133348-reachability-fence-hotspot/webrev/

This seems eminently reasonable, but why does it belong in the
java.lang.ref.Reference class?  It has nothing (directly) to do
with reference objects.

java.lang.Runtime, perhaps?

- Mark