RFR: 8212107: VMThread issues and cleanup [v6]

Fri Sep 25 14:41:23 UTC 2020

On Thu, 24 Sep 2020 20:41:07 GMT, Daniel D. Daugherty <dcubed at openjdk.org> wrote:

>> Changes requested by dcubed (Reviewer).
>
> Most of my comments this round are not critical. The only real issue
> that I found was the change in behavior for the SafepointALot flag.
> The refactoring will make future code maintenance much, much easier,
> but it made reviewing vmThread.cpp an adventure.

@dholmes-ora and @robehn - I'm good with the rationale about
why we have gotten rid of the VM op queue. My comment above
it mostly just mumbling about it to myself while I think it through...

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PR: https://git.openjdk.java.net/jdk/pull/228