[jdk11u-dev] RFR: 8239785: Cgroups: Incorrect detection logic on old systems in hotspot [v2]

[Jonathan Dowland]

> This is a backport of 8239785 for jdk11u. It depends upon 
> pr/865: 8253714 (hopefully the bots will figure this out automatically)
> 
> It's not clean, but the only conflict was the copyright line in the
> comment header for src/hotspot/share/prims/whitebox.hpp.
> 
> I tried these tests, and they pass:
> 
>     test/hotspot/jtreg/applications/ctw/modules/java_compiler.java
>     test/hotspot/jtreg/compiler/c2/Test8004741.java
>     test/hotspot/jtreg/containers/cgroup/CgroupSubsystemFactory.java
> 
> Awaiting tier tests via GA.

Jonathan Dowland has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  Backport add18914fb1294999877b563c734a25b4c17b922

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Changes:
  - all: https://git.openjdk.java.net/jdk11u-dev/pull/880/files
  - new: https://git.openjdk.java.net/jdk11u-dev/pull/880/files/361d45fb..d09b3cd1

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=880&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=880&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/880.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/880/head:pull/880

PR: https://git.openjdk.java.net/jdk11u-dev/pull/880