RFR: 8322420: [Linux] cgroup v2: Limits in parent nested control groups are not detected [v19]

[Jan Kratochvil]

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

Jan Kratochvil has updated the pull request incrementally with two additional commits since the last revision:

 - Inline adjust_controller() twice
 - Revert "Unify 4 copies of adjust_controller()"
   
   This reverts commit 77a81d07d74c8ae9bf34bfd8df9bcaca451ede9a.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/17198/files
  - new: https://git.openjdk.org/jdk/pull/17198/files/7d954ea3..4aec7a6e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17198&range=18
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17198&range=17-18

  Stats: 202 lines in 6 files changed: 109 ins; 87 del; 6 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