hg: hsx/hotspot-gc/hotspot: 7119027: G1: use atomics to update RS length / predict time of inc CSet

[tony.printezis at oracle.com]

Changeset: 67fdcb391461
Author:    tonyp
Date:      2011-12-21 07:53 -0500
URL:       http://hg.openjdk.java.net/hsx/hotspot-gc/hotspot/rev/67fdcb391461

7119027: G1: use atomics to update RS length / predict time of inc CSet
Summary: Make sure that the updates to the RS length and inc CSet predicted time are updated in an MT-safe way.
Reviewed-by: brutisso, iveresov

! src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp
! src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp