RFR: 8343191: Cgroup v1 subsystem fails to set subsystem path [v3]

[Sergey Chernyshev]

On Mon, 11 Nov 2024 15:48:48 GMT, Severin Gehwolf <sgehwolf at openjdk.org> wrote:

> So on cg v1 you start out and end with a `subsystem_path() == null` and on cg v2 you start out and end with a `subsystem_path() == /../../../../../../test`. In both cases the memory limit of 400m won't be detected.

Only when docker fails to mount the cgroup while moving process to an outer group or a sibling group. It's probably not the case with CloudFoundry.

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PR Comment: https://git.openjdk.org/jdk/pull/21808#issuecomment-2468791946