RFR: 8375626: G1: Convert G1CollectionSetChooser to use Atomic<T> [v2]

[Thomas Schatzl]

On Tue, 20 Jan 2026 17:58:00 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

>> Thomas Schatzl has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   * kbarrett review
>
> Looks good.

Thanks @kimbarrett @shipilev for your reviews

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PR Comment: https://git.openjdk.org/jdk/pull/29298#issuecomment-3774290857