RFR: 8333457: GenShen: Move remembered set into new generational code

[Kelvin Nilsen]

On Mon, 3 Jun 2024 21:24:02 GMT, William Kemper <wkemper at openjdk.org> wrote:

> The remembered set is moved into the old generation and the age census is moved into the generational mode heap.

Thanks for this refactoring.

src/hotspot/share/gc/shenandoah/shenandoahGeneration.cpp line 210:

> 208:   shenandoah_assert_safepoint();
> 209: 
> 210:   // TODO: Eventually, we want replace this with a constant-time exchange of pointers.

we want *to* replace.  (preexisting typo in comment, might as well fix...)

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Marked as reviewed by kdnilsen (Committer).

PR Review: https://git.openjdk.org/shenandoah/pull/443#pullrequestreview-2094990659
PR Review Comment: https://git.openjdk.org/shenandoah/pull/443#discussion_r1625134464