RFR: JDK-8325139: JFR SwapSpace event - add free swap space information on Linux when running in a container environment [v8]

[Severin Gehwolf]

On Mon, 4 Mar 2024 14:14:13 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> The JFR SwapSpace event (added by [JDK-8324287](https://bugs.openjdk.org/browse/JDK-8324287)) has been added but in a Linux containerized environment we currently just report -1, this should be enhanced. There is already some code in the mbeans (but in Java) that does something similar .
>
> Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Adjust check in test, remove else case in memory_and_swap_usage_in_bytes

Looks OK to me now. Thanks!

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Marked as reviewed by sgehwolf (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/17966#pullrequestreview-1914551181