Integrated: 8340166: [REDO] CDS: Trim down minimum GC region alignment

[Aleksey Shipilev]

On Mon, 16 Sep 2024 09:10:45 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Now that [JDK-8338912](https://bugs.openjdk.org/browse/JDK-8338912) is in, we can try to redo [JDK-8337828](https://bugs.openjdk.org/browse/JDK-8337828). See the rationale for this change in [JDK-8337828](https://bugs.openjdk.org/browse/JDK-8337828) PR: https://github.com/openjdk/jdk/pull/20469. This change is identical to that PR.
> 
> Additional testing:
>  - [x] Linux x86_64 server fastdebug, `runtime/cds`
>  - [x] Linux x86_64 server fastdebug, `runtime/cds` `-XX:-UseCompressedOops` (failed during the original attempt to do this)
>  - [x] Linux x86_64 server fastdebug, `runtime/cds` `-XX:+UseShenandoahGC`
>  - [x] Linux x86_64 server fastdebug, `runtime/cds` `-XX:+UseShenandoahGC -XX:-UseCompressedOops`

This pull request has now been integrated.

Changeset: 15ae1155
Author:    Aleksey Shipilev <shade at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/15ae1155a11b401e3d1dd39177c209f17f077119
Stats:     5 lines in 1 file changed: 0 ins; 1 del; 4 mod

8340166: [REDO] CDS: Trim down minimum GC region alignment

Reviewed-by: ccheung, iklam

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PR: https://git.openjdk.org/jdk/pull/21011