8329134: Reconsider TLAB zapping

[pengxiaolong]

I'd like to backport JDK-8329134 to jdk22.

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8329134 needs maintainer approval

Issue

• JDK-8329134: Reconsider TLAB zapping (Enhancement - P4 - Approved)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk22u.git pull/233/head:pull/233
$ git checkout pull/233

Update a local copy of the PR:
$ git checkout pull/233
$ git pull https://git.openjdk.org/jdk22u.git pull/233/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 233

View PR using the GUI difftool:
$ git pr show -t 233

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk22u/pull/233.diff

Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back pengxiaolong! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

@pengxiaolong 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:

8329134: Reconsider TLAB zapping

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 2 new commits pushed to the master branch:

• 92e4ba2: 8331885: C2: meet between unloaded and speculative types is not symmetric
• 108e164: 8333093: Incorrect comment in zAddress_aarch64.cpp

Please see this link for an up-to-date comparison between the source branch of this pull request and the master branch.
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[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

⚠️ @pengxiaolong This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[mlbridge]

Webrevs

• 01: Full - Incremental (314bfbb5)
• 00: Full (ec6faaec)

[pengxiaolong]

/approval request Applying for maintainer approval

[openjdk]

@pengxiaolong usage: /approval [<id>] (request|cancel) [<text>]

[pengxiaolong]

/approval request Applying for maintainer approval

[openjdk]

@pengxiaolong
8329134: The approval request has been created successfully.

[pengxiaolong]

/approval request Backport the fix to JDK22 to improve fastdebug tests performance; applies cleanly; All tests passed; Risk is low: there was no follow-up bug since mainline integration 2 months and the production path should not be affected.

[openjdk]

@pengxiaolong
8329134: The approval request has been updated successfully.

[pengxiaolong]

/approval request Backport the fix to JDK22 to improve fastdebug tests performance; applies cleanly; All tests passed; Risk is low: there was no follow-up bug since mainline integration ~2 months ago and the production path should not be affected.

[openjdk]

@pengxiaolong
8329134: The approval request has been updated successfully.

[pengxiaolong]

Thanks for the code review and approval!

/integrate

[openjdk]

@pengxiaolong
Your change (at version 314bfbb) is now ready to be sponsored by a Committer.

[shipilev]

/sponsor

[openjdk]

Going to push as commit 1f73c98.
Since your change was applied there have been 2 commits pushed to the master branch:

• 92e4ba2: 8331885: C2: meet between unloaded and speculative types is not symmetric
• 108e164: 8333093: Incorrect comment in zAddress_aarch64.cpp

Your commit was automatically rebased without conflicts.

[openjdk]

@shipilev @pengxiaolong Pushed as commit 1f73c98.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.