[jdk11u-dev] RFR: 8240189: [TESTBUG] Some cgroup tests are failing after JDK-8231111

[Martin Doerr]

On Mon, 28 Mar 2022 15:39:51 GMT, Severin Gehwolf <sgehwolf at openjdk.org> wrote:

> Please review this test fix backport to align with JDK 17+. Since [JDK-8231111](https://bugs.openjdk.java.net/browse/JDK-8231111) has been backported now, we need to adjust some test code so as to not run afoul when on certain test systems. The original patch doesn't apply cleanly due to:
> 
>  - `test/jdk/jdk/internal/platform/docker/MetricsMemoryTester.java`: [JDK-8275713](https://bugs.openjdk.java.net/browse/JDK-8275713) being present in JDK 11u which is a bug specific to JDK 15 and less.  JDK-8275713 is a partial backport of this bug. Omitted those hunks.
>  - `test/lib/jdk/test/lib/containers/cgroup/MetricsTesterCgroupV1.java`: One hunk didn't apply cleanly due to [JDK-8250984](https://bugs.openjdk.java.net/browse/JDK-8250984) present in 11u ahead of this backport. Fixed this up manually.
> 
> Everything else is the same.
> 
> Testing:
> - [x] container tests on Linux x86_64 on a cgroups v2 and cgroups v1 system. All pass.

LGTM.

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Marked as reviewed by mdoerr (Reviewer).

PR: https://git.openjdk.java.net/jdk11u-dev/pull/956