8358748: Large page size initialization fails with assert "page_size must be a power of 2"

[nelanbu]

Hi all,

This pull request contains a backport of commit 40bc083 from the openjdk/jdk repository.

The commit being backported was authored by Yagmur Eren on 20 Aug 2025 and was reviewed by Albert Yang and David Holmes.

Thanks!

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• JDK-8358748 needs maintainer approval
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8358748: Large page size initialization fails with assert "page_size must be a power of 2" (Bug - P4 - Approved)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk25u.git pull/234/head:pull/234
$ git checkout pull/234

Update a local copy of the PR:
$ git checkout pull/234
$ git pull https://git.openjdk.org/jdk25u.git pull/234/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 234

View PR using the GUI difftool:
$ git pr show -t 234

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk25u/pull/234.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back nelanbu! 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]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

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

[mlbridge]

Webrevs

• 00: Full (6a4fdf10)

[nelanbu]

/approval request
Low risk backport. It adds a constraint to the -XX:LargePageSizeInBytes option.

[openjdk]

@nelanbu
8358748: The approval request has been created successfully.