RFR: 8374322: TestMemoryWithSubgroups.java fails Permission denied [v3]

[David Holmes]

On Tue, 6 Jan 2026 07:39:19 GMT, SendaoYan <syan at openjdk.org> wrote:

>> Hi all,
>> 
>> Test containers/docker/TestMemoryWithSubgroups.java fails on some docker images. If the default user inside docker is non root user, test will report fails "mkdir: cannot create directory '/sys/fs/cgroup/memory': Permission denied". This PR add docker run parameter `--user root` to force use root user inside docker containter.
>> 
>> Change has been verified locally on ubuntu22(cgroup v2). Test-fix only, no risk.
>
> SendaoYan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add --user root when start docker container

I am running this through our tier5 testing ...

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PR Comment: https://git.openjdk.org/jdk/pull/28975#issuecomment-3713824902