hg: jdk9/hs-rt/hotspot: 8144527: NewSizeThreadIncrease would make an overflow

[jon.masamitsu at oracle.com]

Changeset: 756bb5cfc5cb
Author:    sangheki
Date:      2016-01-05 17:05 -0800
URL:       http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/756bb5cfc5cb

8144527: NewSizeThreadIncrease would make an overflow
Summary: Revert to previous value if NewSizeThreadIncrease related calculation overflows
Reviewed-by: jwilhelm, mgerdin, mchernov

! src/share/vm/gc/serial/defNewGeneration.cpp
! src/share/vm/gc/serial/defNewGeneration.hpp
+ test/gc/arguments/TestNewSizeThreadIncrease.java