RFR: 8338383: Implement JEP 491: Synchronize Virtual Threads without Pinning [v2]

[Serguei Spitsyn]

On Thu, 7 Nov 2024 00:38:57 GMT, Patricio Chilano Mateo <pchilanomate at openjdk.org> wrote:

>>> the call to java_lang_Thread::set_is_in_VTMS_transition()is not needed in JvmtiUnmountBeginMark
>>>
>> Why is not needed? I guess you meant to say we should use `JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition()` which does both?
>
>> the function is_vthread_safe_to_preempt() does not need the vthread parameter
>> 
> Removed.

Thank you for the update! It looks okay to me.

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PR Review Comment: https://git.openjdk.org/jdk/pull/21565#discussion_r1833168776