RFR: 8361099: Shenandoah: Improve heap lock contention by using CAS for memory allocation

[Xiaolong Peng]

On Thu, 10 Jul 2025 22:45:01 GMT, William Kemper <wkemper at openjdk.org> wrote:

> It would be helpful to have a more detailed overview in the change log description to help reviewers get oriented with the changes.

Thanks, I'll add detailed overview next week, I didn't add too much since I knew I was going to change the code significantly.

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PR Comment: https://git.openjdk.org/jdk/pull/26171#issuecomment-3064470661