git: openjdk/jdk: 8254758: Change G1ServiceThread to be task based

[Stefan Johansson]

Changeset: 1d0bd506
Author:    Stefan Johansson <sjohanss at openjdk.org>
Date:      2020-11-03 11:07:35 +0000
URL:       https://github.com/openjdk/jdk/commit/1d0bd506

8254758: Change G1ServiceThread to be task based

Reviewed-by: ayang, iwalulya, tschatzl

! src/hotspot/share/gc/g1/g1ServiceThread.cpp
! src/hotspot/share/gc/g1/g1ServiceThread.hpp
+ test/hotspot/gtest/gc/g1/test_g1ServiceThread.cpp