hg: jdk7/hotspot-gc/hotspot: 6819891: ParNew: Fix work queue overflow code to deal correctly with +UseCompressedOops

[y.s.ramakrishna at sun.com]

Changeset: cea947c8a988
Author:    ysr
Date:      2009-03-28 15:47 -0700
URL:       http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/cea947c8a988

6819891: ParNew: Fix work queue overflow code to deal correctly with +UseCompressedOops
Summary: When using compressed oops, rather than chaining the overflowed grey objects' pre-images through their klass words, we use GC-worker thread-local overflow stacks.
Reviewed-by: jcoomes, jmasa

! src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp
! src/share/vm/gc_implementation/parNew/parNewGeneration.cpp
! src/share/vm/gc_implementation/parNew/parNewGeneration.hpp
! src/share/vm/runtime/globals.hpp