RFR: JDK-8325139: JFR SwapSpace event - add free swap space information on Linux when running in a container environment [v6]

[Matthias Baesken]

On Thu, 29 Feb 2024 15:17:17 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:
> 
>   testing

I adjusted os_linux like you suggested.

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PR Comment: https://git.openjdk.org/jdk/pull/17966#issuecomment-1973407673