8380778: [lworld] G1: Eager reclaim for flat arrays

[tschatzl]

Hi all,

please review this change that extends G1 eager reclaim to large flat arrays.

This is mostly just a generalization ion of the existing mechanism, there is not much new about it.

Testing: gha, tier1-5

Thanks,
Thomas

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• JDK-8380778: [lworld] G1: Eager reclaim for flat arrays (Enhancement - P4)

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