RFR: 8335480: Only deoptimize threads if needed when closing shared arena [v3]

[Maurizio Cimadamore]

On Mon, 15 Jul 2024 16:35:26 GMT, Uwe Schindler <uschindler at openjdk.org> wrote:

> So +1 to merge this and hopefully backport it at least to 21?

Backport to 21 is difficult, given the handshake code there is different (and, FFM is preview there). But, might be more possible for 22. I have notified Roland re. the `int` problem, will update once I know more about the nature of this issue.

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PR Comment: https://git.openjdk.org/jdk/pull/20158#issuecomment-2228939812