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

[Aleksey Shipilev]

On Tue, 20 Jan 2026 08:07:50 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> Hi all,
>> 
>>   please review this change to use `Atomic<T>` for the `G1CollectionSetChooser` class.
>> 
>> Testing: gha
>> 
>> Thanks,
>>   Thomas
>
> Thomas Schatzl has updated the pull request incrementally with one additional commit since the last revision:
> 
>   * kbarrett review

Looks right.

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Marked as reviewed by shade (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/29298#pullrequestreview-3681344363