RFR: 8346123: [REDO] NMT should not use ThreadCritical [v6]

[David Holmes]

On Fri, 20 Dec 2024 18:22:53 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> Hotspot loading and CreateJavaVM may happen on different threads

??? What are you referring to as "hotspot loading"? To me that _is_ CreateJavaVM.

> Or, we could move it to the thread subsystem

We already have `Threads::number_of_threads()`.

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PR Review Comment: https://git.openjdk.org/jdk/pull/22745#discussion_r1895052378