hg: hsx/hotspot-gc/hotspot: 8009536: G1: Apache Lucene hang during reference processing

[john.cuthbertson at oracle.com]

Changeset: fa08949fe0cb
Author:    johnc
Date:      2013-03-18 11:05 -0700
URL:       http://hg.openjdk.java.net/hsx/hotspot-gc/hotspot/rev/fa08949fe0cb

8009536: G1: Apache Lucene hang during reference processing
Summary: In CMTask::do_marking_step(), Skip offering termination and entering the first and second synchronization barriers if called from a serial context, i.e. the VM thread.
Reviewed-by: brutisso, tschatzl

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