hg: jdk8u/jdk8u-dev/hotspot: 8152438: Threads may do significant work out of the non-shared overflow buffer

[kevin.walls at oracle.com]

Changeset: a753c8401458
Author:    shshahma
Date:      2016-09-01 06:16 -0700
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u-dev/hotspot/rev/a753c8401458

8152438: Threads may do significant work out of the non-shared overflow buffer
Summary: Before processing an element in the non-shared overflow buffer, try to push it into the local shared buffer to keep it full.
Reviewed-by: jmasa, ehelin, sjohanss

! src/share/vm/gc_implementation/g1/g1ParScanThreadState.cpp
! src/share/vm/utilities/taskqueue.hpp