RFR: 8306929: Avoid CleanClassLoaderDataMetaspaces safepoints when previous versions are shared [v2]

[Stefan Johansson]

On Fri, 28 Apr 2023 15:57:49 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Stefan Johansson has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - Test refactor
>>  - Serguei review
>
> This looks good. Thanks for all the testing and adding the new test.

Thanks again @coleenp and @sspitsyn for the reviews.

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PR Comment: https://git.openjdk.org/jdk/pull/13716#issuecomment-1534557035