RFR: 8375643: G1: Convert G1RegionMarkStatsCache to use Atomic<T> [v2]

[Thomas Schatzl]

On Tue, 20 Jan 2026 13:09:24 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Thomas Schatzl has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   * shade review
>
> Marked as reviewed by shade (Reviewer).

Thanks @shipilev @kimbarrett for your reviews

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PR Comment: https://git.openjdk.org/jdk/pull/29303#issuecomment-3772863296