hg: jdk8u/jdk8u-dev/hotspot: 8147087: Race when reusing PerRegionTable bitmaps may result in dropped remembered set entries

[thomas.schatzl at oracle.com]

Changeset: 71f6bbeb6026
Author:    tschatzl
Date:      2016-01-21 15:15 +0100
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u-dev/hotspot/rev/71f6bbeb6026

8147087: Race when reusing PerRegionTable bitmaps may result in dropped remembered set entries
Summary: Do not make reused PRTs available to other threads before the bitmap of the PRT has been cleared.
Reviewed-by: tbenson, mgerdin, brutisso
Contributed-by: Poonam Bajaj <poonam.bajaj at oracle.com>, Thomas Schatzl <thomas.schatzl at oracle.com>

! src/share/vm/gc_implementation/g1/heapRegionRemSet.cpp