8260704: ParallelGC: oldgen expansion needs release-store for _end

[kimbarrett]

Please review this change that ensures MutableSpace::_end is updated after
everything else that is relevant when expanding, by using a release_store to
perform the update. With this change the storestore that was added by
JDK-8257999 is no longer needed.

Testing:
mach5 tier1-3, tier5

/summary Move JDK-8257999 barrier to correct location.

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change must be properly reviewed

Issue

• JDK-8260704: ParallelGC: oldgen expansion needs release-store for _end

Reviewers

• Thomas Schatzl (@tschatzl - Reviewer) ⚠️ Review applies to 91d8be3
• Stefan Johansson (@kstefanj - Reviewer) ⚠️ Review applies to 91d8be3

Download

$ git fetch https://git.openjdk.java.net/jdk16 pull/141/head:pull/141
$ git checkout pull/141

[bridgekeeper]

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[openjdk]

@kimbarrett Setting summary to Move JDK-8257999 barrier to correct location.

[openjdk]

@kimbarrett The following label will be automatically applied to this pull request:

• hotspot-gc

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[mlbridge]

Webrevs

• 01: Full - Incremental (3929bb7)
• 00: Full (91d8be3)

[tschatzl]

Lgtm

[openjdk]

@kimbarrett This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8260704: ParallelGC: oldgen expansion needs release-store for _end

Move JDK-8257999 barrier to correct location.

Reviewed-by: tschatzl, sjohanss

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[kstefanj]

Looks good.

[kimbarrett]

Thanks @tschatzl and @kstefanj for reviews.

[kimbarrett]

/integrate

[openjdk]

@kimbarrett Pushed as commit afd5eef.

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