RFR: 8375978: G1: Convert G1Policy to use Atomic<T>

[Thomas Schatzl]

On Wed, 21 Jan 2026 16:52:41 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

>> Hi all,
>> 
>>   please review this conversion of `G1Policy` to use `Atomic<T>`.
>> 
>> Also removed the unused `_young_list_max_length` instead of unnecessarily converting it.
>> 
>> Testing: gha
>> 
>> Thanks,
>>   Thomas
>
> Looks good, and trivial.

Thanks @kimbarrett for your review

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PR Comment: https://git.openjdk.org/jdk/pull/29344#issuecomment-3783174821