hg: shenandoah/jdk9/hotspot: Parallelize code cache scan better.

[ashipile at redhat.com]

Changeset: c62c965b784a
Author:    shade
Date:      2017-04-27 22:00 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/c62c965b784a

Parallelize code cache scan better.

! src/share/vm/code/codeCache.cpp
! src/share/vm/code/codeCache.hpp
! src/share/vm/gc/shenandoah/shenandoahRootProcessor.cpp