RFR: 8365780: G1: Remset for young regions are cleared too early during Full GC

[Stefan Johansson]

On Tue, 19 Aug 2025 09:24:06 GMT, Ivan Walulya <iwalulya at openjdk.org> wrote:

> Hi,
> Please review this patch to move clearing of the young region remsets to later in the Full GC. G1HeapVerifier specifically G1FullCollector::verify_after_marking still assumes that the remsets for young regions are still valid and with status complete. Clearing these remsets too early triggers the verification failure.
> 
> Testing: - Tiers 1-3

Looks good.

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Marked as reviewed by sjohanss (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/26839#pullrequestreview-3131877071