RFR: 8365823: Revert storing abstract and interface Klasses to non-class metaspace [v3]

Wed Sep 17 15:17:57 UTC 2025

On Mon, 15 Sep 2025 14:38:03 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> This change removes the optimization to not store abstract and interface Klass metadata to non-class metaspace.  Now all Klass metadata is in the Klass metaspace.  This is simpler and less bug prone, and didn't help with the limitation of classes that can be stored in class metaspace materially.
>> Tested with tier1-4.
>
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove CFP.is_abstract().

Good.

This is not 1-to-1 back-out of #19157 . I assume it is because there were several additional follow up fixes.

Will 25u backport be the same?

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Marked as reviewed by kvn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/27295#pullrequestreview-3234989383