RFR: 8322420: [Linux] cgroup v2: Limits in parent nested control groups are not detected [v16]

[Jan Kratochvil]

> The testcase requires root permissions.
> 
> Fix by  Severin Gehwolf.
> Testcase by Jan Kratochvil.

Jan Kratochvil has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 117 commits:

 - Fix testcase compatibility with Alpine Linux 3.20.1
 - Merge branch 'master' into master-cgroup
 - Unify 4 copies of adjust_controller()
 - Fix a needless whitespace change
 - Merge branch 'master-jdk-8322420_cgroup_hierarchy_walk_init-test' into master-cgroup
 - +test
 - Merge branch 'master' into master-jdk-8322420_cgroup_hierarchy_walk_init
 - Merge branch 'master' into jdk-8322420_cgroup_hierarchy_walk_init
 - Merge branch 'master' into jdk-8322420_cgroup_hierarchy_walk_init
 - 8322420: [Linux] cgroup v2: Limits in parent nested control groups are not detected
 - ... and 107 more: https://git.openjdk.org/jdk/compare/aabec4a9...219c343d

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Changes: https://git.openjdk.org/jdk/pull/17198/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17198&range=15
  Stats: 561 lines in 10 files changed: 490 ins; 52 del; 19 mod
  Patch: https://git.openjdk.org/jdk/pull/17198.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17198/head:pull/17198

PR: https://git.openjdk.org/jdk/pull/17198