RFR: 8342444: Shenandoah: Uncommit regions from a separate, STS aware thread [v6]

[Aleksey Shipilev]

On Tue, 19 Nov 2024 20:23:57 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> We can restore the log messages, but I don't think `ShenandoahConcurrentPhase` and friends will like being used outside of a cycle. I'll look into it.
>
> Yeah, at least restore the log format and add `gc+start` log as well.

This one is still not addressed, unfortunately ^

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PR Review Comment: https://git.openjdk.org/jdk/pull/22019#discussion_r1849936299