Integrated: 8359868: Shenandoah: Free threshold heuristic does not use SoftMaxHeapSize

[Rui Li]

On Tue, 8 Jul 2025 18:42:49 GMT, Rui Li <duke at openjdk.org> wrote:

> Shenandoah some of the usages of [ShenandoahMinFreeThreshold](https://github.com/openjdk/jdk/blob/master/src/hotspot/share/gc/shenandoah/shenandoah_globals.hpp#L193) and [ShenandoahCriticalFreeThreshold](https://github.com/openjdk/jdk/blob/ba0c12231b0f5b680951e75765b5d292f31a2cbc/src/hotspot/share/gc/shenandoah/shenandoah_globals.hpp#L445) use max capacity instead of [soft max capacity](https://github.com/openjdk/jdk/blob/master/src/hotspot/share/gc/shared/gc_globals.hpp#L528). 
> 
> This change replaces those usages with soft max heap size values.
> 
> tier1 tests are in progress

Moved to ready for review a bit late - after the approval. Checking if integrating now works.

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PR Comment: https://git.openjdk.org/jdk/pull/26199#issuecomment-3050396990