[jdk21u-dev] RFR: 8272364: Parallel GC adaptive size policy may shrink the heap below MinHeapSize

[Paul Hohensee]

On Tue, 28 Oct 2025 17:59:55 GMT, Daniel Hu <duke at openjdk.org> wrote:

> Clean backports. Fixes miscalculation of Parallal GC ergonomics; followup backports to fix related gtest (JDK-8333674 is trivial and backported so that JDK-8331675 is clean). New test passes with change, fails without. Changes pass GHA and internal Amazon pipelines: jtreg tier1-4 on platforms linux x64, aarch64, aarch32; alpine x64, aarch64; mac aarch64, x64; windows x64.

Marked as reviewed by phh (Reviewer).

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PR Review: https://git.openjdk.org/jdk21u-dev/pull/2419#pullrequestreview-3435259195