8278951: containers/cgroup/PlainRead.java fails on Ubuntu 21.10

[jmtd]

Part of cgroups v2 backport works. Conflict on copyright line. local testing: v1 system passed; v2 system with no user delegated cpu controller failed, this is fixed by later bug 8250984. I am about to verify v2 with delegated cpu controller locally and will update this when I have the result.

---

Progress

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Issue

• JDK-8278951: containers/cgroup/PlainRead.java fails on Ubuntu 21.10

Reviewers

• Severin Gehwolf (@jerboaa - Reviewer)

Reviewing

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$ git checkout pull/984

Update a local copy of the PR:
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$ git pull https://git.openjdk.java.net/jdk11u-dev pull/984/head

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[openjdk]

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

[mlbridge]

Webrevs

• 00: Full (0b00439c)

[jerboaa]

LGTM.

Aside: JDK-8250984 is already in JDK 11u, so that backport cannot fix anything at this point. Any fixes would need to be done as a 11u-specific bug.

[jmtd]

Update on testing: test passes after I manually configure cpu cgroup delegation to user process heirarchy on my host; it was not enabled by default.

[openjdk]

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

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

8278951: containers/cgroup/PlainRead.java fails on Ubuntu 21.10

Reviewed-by: sgehwolf

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 3 new commits pushed to the master branch:

• 34ed681: 8283497: [windows] print TMP and TEMP in hs_err and VM.info
• 319309e: 8270797: ShortECDSA.java test is not complete
• 164febe: 8255604: java/nio/channels/DatagramChannel/Connect.java fails with java.net.BindException: Cannot assign requested address: connect

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.

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[jmtd]

/integrate

[openjdk]

@jmtd
Your change (at version 0b00439) is now ready to be sponsored by a Committer.

[jerboaa]

/sponsor

[openjdk]

Going to push as commit 4c8b099.
Since your change was applied there have been 3 commits pushed to the master branch:

• 34ed681: 8283497: [windows] print TMP and TEMP in hs_err and VM.info
• 319309e: 8270797: ShortECDSA.java test is not complete
• 164febe: 8255604: java/nio/channels/DatagramChannel/Connect.java fails with java.net.BindException: Cannot assign requested address: connect

Your commit was automatically rebased without conflicts.

[openjdk]

@jerboaa @jmtd Pushed as commit 4c8b099.

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