[jdk17u-dev] RFR: 8280705: Parallel: Full gc mark stack draining should prefer to make work available to other threads [v2]

[Aleksey Shipilev]

> Clean backport to match what G1 is also doing. The change was in mainline for more than a year without related issues.
> 
> Additional testing:
>  - [x] Linux x86_64 fastdebug `tier1` with `-XX:+UseParallelGC`
>  - [x] Linux x86_64 fastdebug `tier2` with `-XX:+UseParallelGC`
>  - [x] Linux x86_64 fastdebug `tier3` with `-XX:+UseParallelGC`

Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'master' into JDK-8280705-parallel-fullgc-work
 - Backport bdda43e066b8da0ebf9a8ef2f843eabb230f0800

-------------

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/1521/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/1521/files/46505818..e941b400

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1521&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1521&range=00-01

  Stats: 70426 lines in 369 files changed: 69411 ins; 501 del; 514 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1521.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1521/head:pull/1521

PR: https://git.openjdk.org/jdk17u-dev/pull/1521