[jdk17u-dev] RFR: 8261495: Shenandoah: reconsider update references memory ordering [v2]

[Aleksey Shipilev]

> Transplanted from https://github.com/openjdk/jdk17u/pull/254
> 
> Additional testing: 
>  - [ ] Linux x86_64 fastdebug `hotspot_gc_shenandoah`
>  - [ ] Linux x86_64 fastdebug `tier1` with Shenandoah
>  - [ ] Linux AArch64 fastdebug `hotspot_gc_shenandoah`
>  - [ ] Linux AArch64 fastdebug `tier1` with Shenandoah

Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:

  Backport a96012a7afce6678125d3fb537f2433642953315

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

Changes: https://git.openjdk.org/jdk17u-dev/pull/8/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=8&range=01
  Stats: 128 lines in 7 files changed: 91 ins; 13 del; 24 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/8.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/8/head:pull/8

PR: https://git.openjdk.org/jdk17u-dev/pull/8