RFR: 8375966: G1: Convert G1UpdateRegionLivenessAndSelectForRebuildTask to use Atomic<T>

[Kim Barrett]

On Wed, 21 Jan 2026 10:56:51 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

> Hi all,
> 
>   please review this change to convert `G1UpdateRegionLivenessAndSelectForRebuildTask` to use `Atomic<T>`.
> 
> Testing: gha
> 
> Thanks,
>   Thomas

Looks good, with an optional whitespace adjustment.

src/hotspot/share/gc/g1/g1ConcurrentMarkRemarkTasks.hpp line 61:

> 59:   void work(uint worker_id) override;
> 60: 
> 61:   uint total_selected_for_rebuild() const { return _total_selected_for_rebuild.load_relaxed(); }

Consider adding some line breaks to make this not such a long line.

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Marked as reviewed by kbarrett (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/29340#pullrequestreview-3688256831
PR Review Comment: https://git.openjdk.org/jdk/pull/29340#discussion_r2713411963