RFR: 8322420: [Linux] cgroup v2: Limits in parent nested control groups are not detected [v20]

[Jan Kratochvil]

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

Jan Kratochvil has updated the pull request incrementally with one additional commit since the last revision:

  Testcase update upon review by Severin Gehwolf

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/17198/files
  - new: https://git.openjdk.org/jdk/pull/17198/files/4aec7a6e..b790b181

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17198&range=19
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17198&range=18-19

  Stats: 131 lines in 3 files changed: 21 ins; 67 del; 43 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