[jdk25u-dev] RFR: 8370572: Cgroups hierarchical memory limit is not honored after JDK-8322420 [v2]

[Aleksey Shipilev]

On Mon, 15 Dec 2025 18:59:05 GMT, Severin Gehwolf <sgehwolf at openjdk.org> wrote:

>> Unclean backport of JDK-8370572 since JDK-8292984 is not in 25u (a cleanup patch). That change basically renames `phys_mem` to `upper_bound`. Not really critical to get JDK-8292984 into 25u.
>> 
>> Please review!
>> 
>> Testing:
>> - [x] GHA
>> - [x] Container tests on Linux x86_64 on cgroups v1 including the test from JDK-8370966 ([see dependent PR](https://github.com/openjdk/jdk25u-dev/pull/77)). Also checked container tests on cgroups v2 for sanity. This patch is a no-op there.
>
> Severin Gehwolf has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Use the corretto approach

This looks great, thank you!

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Marked as reviewed by shade (Reviewer).

PR Review: https://git.openjdk.org/jdk25u-dev/pull/76#pullrequestreview-3582052652