RFR: 8335865: Shenandoah: Improve THP pretouch after JDK-8315923

[Aleksey Shipilev]

On Wed, 7 Aug 2024 17:04:38 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> I think we only need to confirm using the one-liner I had above that >=5.14 really works

I confirmed Shenandoah THP+Pretouch works well on my desktop with 5.15, either by default or with `-XX:-UseMadvPopulateWrite`.

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PR Comment: https://git.openjdk.org/jdk/pull/20254#issuecomment-2274119099