[jdk8u-dev] RFR: 8289695: [TESTBUG] TestMemoryAwareness.java fails on cgroups v2 and crun [v3]

[Severin Gehwolf]

On Mon, 9 Jan 2023 13:16:43 GMT, Severin Gehwolf <sgehwolf at openjdk.org> wrote:

>> Clean backport. Fixes a test issue on cg v2 where `--memory-swappiness` is not supported.
>
> Severin Gehwolf has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:
> 
>   8289695: [TESTBUG] TestMemoryAwareness.java fails on cgroups v2 and crun
>   
>   Backport-of: ac6be165196457a26d837760b5f5030fe010d633

Thanks!

> Was `--memory-swappiness` actually achieving anything on systems where it was supported?

Memory swappiness is a cgroup v1 feature. So it might have had some effect, but for the purpose of the test I'm not sure it did matter as it was setting memory and memory/swap to the same value anyway. At least I'm not aware of any test failures of this OOM test with these settings.

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PR: https://git.openjdk.org/jdk8u-dev/pull/217