[aarch64-port-dev ] git: openjdk/aarch64-port: master: 8260044: Parallel GC: Concurrent allocation after heap expansion may cause unnecessary full gc

[Kim Barrett]

Changeset: 6a84ec68
Author:    Kim Barrett <kbarrett at openjdk.org>
Date:      2021-02-12 08:19:08 +0000
URL:       https://git.openjdk.java.net/aarch64-port/commit/6a84ec68

8260044: Parallel GC: Concurrent allocation after heap expansion may cause unnecessary full gc
8260045: Parallel GC: Waiting on ExpandHeap_lock may cause "expansion storm"

Loop to retry allocation if expand succeeds.  Treat space available after obtaining expand lock as expand success.

Reviewed-by: tschatzl, iwalulya, sjohanss

! src/hotspot/share/gc/parallel/mutableSpace.cpp
! src/hotspot/share/gc/parallel/mutableSpace.hpp
! src/hotspot/share/gc/parallel/psOldGen.cpp
! src/hotspot/share/gc/parallel/psOldGen.hpp