RFR: 8321931: memory_swap_current_in_bytes reports 0 as "unlimited"

[Gerard Ziemski]

On Tue, 16 Jan 2024 18:13:11 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> Are we sure 0 means unlimited? I looked at https://www.kernel.org/doc/Documentation/cgroup-v1/memory.txt and did not find any remarks.
> 
> https://unix.stackexchange.com/questions/420906/what-is-the-value-for-the-cgroups-limit-in-bytes-if-the-memory-is-not-restricte seems to indicate the value is some very high number. Or is this handled by the JVMs cgroup layer?

Now I'm not 100% sure. I think it was a source code comment somewhere where I saw this special 0 treatment. I will have to refresh my memory...

Thank you for taking a look!

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PR Comment: https://git.openjdk.org/jdk/pull/17314#issuecomment-1894583963