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8313782: Add user-facing warning if THPs are enabled but cannot be used #1978

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RealCLanger
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@RealCLanger RealCLanger commented Nov 21, 2023

Hi all,

This pull request contains a backport of JDK-8313782, commit 44b5b81f from the openjdk/jdk21u repository.

Thanks!


Progress

  • Change must not contain extraneous whitespace
  • Commit message must refer to an issue
  • JDK-8313782 needs maintainer approval

Issue

  • JDK-8313782: Add user-facing warning if THPs are enabled but cannot be used (Enhancement - P4 - Approved)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk17u-dev.git pull/1978/head:pull/1978
$ git checkout pull/1978

Update a local copy of the PR:
$ git checkout pull/1978
$ git pull https://git.openjdk.org/jdk17u-dev.git pull/1978/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 1978

View PR using the GUI difftool:
$ git pr show -t 1978

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk17u-dev/pull/1978.diff

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bridgekeeper bot commented Nov 21, 2023

👋 Welcome back clanger! 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 openjdk bot changed the title Backport 44b5b81f76567d0b7fc4687e18c53d7ddbd2e982 8313782: Add user-facing warning if THPs are enabled but cannot be used Nov 21, 2023
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openjdk bot commented Nov 21, 2023

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

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openjdk bot commented Nov 21, 2023

⚠️ @RealCLanger 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.

@openjdk openjdk bot added the rfr Pull request is ready for review label Nov 21, 2023
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mlbridge bot commented Nov 21, 2023

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/approval request Main reason for requesting this backport is that it comes together with JDK-8313781 which fixes a test failure in hotspot jtreg test runtime/os/TestHugePageDetection.java that we see in certain linux configurations. The introduced warning by itself is helpful, too. Risk medium/low. Tested in GHA and SAP nightlies.

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openjdk bot commented Nov 22, 2023

@RealCLanger
8313782: The approval request has been created successfully.

@openjdk openjdk bot added the approval label Nov 22, 2023
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openjdk bot commented Nov 23, 2023

@RealCLanger 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:

8313782: Add user-facing warning if THPs are enabled but cannot be used

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 8 new commits pushed to the master branch:

  • 0f2da83: 8316746: Top of lock-stack does not match the unlocked object
  • 2da7aeb: 8310656: RISC-V: __builtin___clear_cache can fail silently.
  • 40c29f7: 8279856: Parallel: Use PreservedMarks to record promotion-failed objects
  • 2a37bae: 8262186: Call X509KeyManager.chooseClientAlias once for all key types
  • b7605b7: 8302109: Trivial fixes to btree tests
  • c478c81: 8292067: Convert test/sun/management/jmxremote/bootstrap shell tests to java version
  • e4ddf06: 8320053: GHA: Cross-compile gtest code
  • 3d9cb02: 8317834: java/lang/Thread/IsAlive.java timed out

Please see this link for an up-to-date comparison between the source branch of this pull request and the master branch.
As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

@openjdk openjdk bot added ready Pull request is ready to be integrated and removed approval labels Nov 23, 2023
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/integrate

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openjdk bot commented Nov 23, 2023

Going to push as commit 5531ca5.
Since your change was applied there have been 8 commits pushed to the master branch:

  • 0f2da83: 8316746: Top of lock-stack does not match the unlocked object
  • 2da7aeb: 8310656: RISC-V: __builtin___clear_cache can fail silently.
  • 40c29f7: 8279856: Parallel: Use PreservedMarks to record promotion-failed objects
  • 2a37bae: 8262186: Call X509KeyManager.chooseClientAlias once for all key types
  • b7605b7: 8302109: Trivial fixes to btree tests
  • c478c81: 8292067: Convert test/sun/management/jmxremote/bootstrap shell tests to java version
  • e4ddf06: 8320053: GHA: Cross-compile gtest code
  • 3d9cb02: 8317834: java/lang/Thread/IsAlive.java timed out

Your commit was automatically rebased without conflicts.

@openjdk openjdk bot added the integrated Pull request has been integrated label Nov 23, 2023
@openjdk openjdk bot closed this Nov 23, 2023
@openjdk openjdk bot removed ready Pull request is ready to be integrated rfr Pull request is ready for review labels Nov 23, 2023
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openjdk bot commented Nov 23, 2023

@RealCLanger Pushed as commit 5531ca5.

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

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