hg: shenandoah/jdk8u/hotspot: [backport] Reduce region retirement during tlab allocation

[ashipile at redhat.com]

Changeset: 577aaacece0c
Author:    shade
Date:      2017-05-09 13:29 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/577aaacece0c

[backport] Reduce region retirement during tlab allocation

! src/share/vm/gc_implementation/shenandoah/shenandoahFreeSet.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahFreeSet.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.cpp