hg: hsx/hotspot-gc/hotspot: 7052429: G1: Avoid unnecessary scanning of humongous regions during concurrent marking

[john.cuthbertson at oracle.com]

Changeset: bce1ac447f6b
Author:    johnc
Date:      2013-02-06 14:50 -0800
URL:       http://hg.openjdk.java.net/hsx/hotspot-gc/hotspot/rev/bce1ac447f6b

7052429: G1: Avoid unnecessary scanning of humongous regions during concurrent marking
Summary: Skip unnecessary scanning of bitmap for unmarked humongous objects/regions.
Reviewed-by: jwilhelm, johnc
Contributed-by: Tao Mao <tao.mao at oracle.com>

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