RFR: 8322420: [Linux] cgroup v2: Limits in parent nested control groups are not detected [v4]

[Jan Kratochvil]

> The testcase requires root permissions.

Jan Kratochvil has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains ten additional commits since the last revision:

 - Fix test/jdk/jdk/internal/platform/cgroup/ testcases regression
 - Fix cgroup1 hierarchical limit reading
 - Fix the testcase for cgroup1
 - NestedCgroup: Better error reporting
 - Merge branch 'master' into master-cgroup
 - Merge branch 'master' into master-cgroup
 - Fix gtest testcases compilation errors
 - 8322420: [Linux] cgroup v2: Limits in parent nested control groups are not detected
 - 4c556a78: <no commit message found>

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/17198/files
  - new: https://git.openjdk.org/jdk/pull/17198/files/ae58f7e3..dcb46c59

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17198&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17198&range=02-03

  Stats: 109 lines in 9 files changed: 35 ins; 28 del; 46 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