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

[Goetz Lindenmaier]

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.

Hi @cost0much 
Why do you merge this into one PR?  If it is clean, it would be much better to have three PRs.
You can do dependent PRs, i.e. for the second make a branch on top of the first, and in the PR 
use the git branch of the first RP to compare to.

Also, please give a reason why you want to backport [JDK-8272364](https://bugs.openjdk.org/browse/JDK-8272364)

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PR Comment: https://git.openjdk.org/jdk21u-dev/pull/2419#issuecomment-3520593778