8312394: [linux] SIGSEGV if kernel was built without hugepage support

[tabata-d]

JDK-8312394 describes an issue where the JVM crashes on startup on Linux systems with kernels that do not support hugepages, specifically when the /sys/kernel/mm/hugepages directory is inaccessible. This regression was introduced by JDK-8310233.

The fix was originally implemented in JDK 22. Now we are backporting this into JDK 11.

I confirmed that it was reproduced on Linux x86_64 using JDK 11.

Unclean Backport

This backport is a clean backport, except that JDK 11 uses NULL instead of nullptr."

Testing

System: Red Hat Enterprise Linux 9.4 (x86_64).
jtreg: A comprehensive jtreg run on the entire hotspot/jtreg test suite confirmed that all HotSpot tests passed.

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8312394 needs maintainer approval

Integration blocker

 ⚠️ Dependency #3171 must be integrated first

Issue

• JDK-8312394: [linux] SIGSEGV if kernel was built without hugepage support (Bug - P3)

Reviewers

• Paul Hohensee (@phohensee - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk11u-dev.git pull/3172/head:pull/3172
$ git checkout pull/3172

Update a local copy of the PR:
$ git checkout pull/3172
$ git pull https://git.openjdk.org/jdk11u-dev.git pull/3172/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 3172

View PR using the GUI difftool:
$ git pr show -t 3172

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk11u-dev/pull/3172.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back dtabata! A progress list of the required criteria for merging this PR into pr/3171 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

• 01: Full - Incremental (d78131ae)
• 00: Full (522c3045)

[bridgekeeper]

@tabata-d This pull request has been inactive for more than 4 weeks and will be automatically closed if another 4 weeks passes without any activity. To avoid this, simply issue a /touch or /keepalive command to the pull request. Feel free to ask for assistance if you need help with progressing this pull request towards integration!

[tabata-d]

/touch

[openjdk]

@tabata-d The pull request is being re-evaluated and the inactivity timeout has been reset.

[tabata-d]

/template append

[openjdk]

@tabata-d The pull request template has been appended to the pull request body

[tabata-d]

After the discussion in #3210, I have decided to close this PR.