RFR: 8372993: Serial: max_eden_size is too small after JDK-8368740 [v3]

[Stefan Karlsson]

On Wed, 3 Dec 2025 12:49:39 GMT, Joel Sikström <jsikstro at openjdk.org> wrote:

>> Hello,
>> 
>> `_max_eden_size` does not represent the actual upper-limit of how large eden might grow. The upper-limit was changed in (JDK-8368740)[https://bugs.openjdk.org/browse/JDK-8368740], so that eden might now grow to be as large as the entire young generation. We run into an exception when trying to use this value through the MemoryUsage Java API. If the committed memory in eden is larger than `_max_eden_size`, we throw an exception in the Java constructor of MemoryUsage: https://github.com/openjdk/jdk/blob/master/src/java.management/share/classes/java/lang/management/MemoryUsage.java#L165-L168
>> 
>> Testing:
>> * Oracle's tier1-4
>
> Joel Sikström has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Test fix for TestNewSizeFlags.java to reflect bew max of young gen spaces

Marked as reviewed by stefank (Reviewer).

-------------

PR Review: https://git.openjdk.org/jdk/pull/28630#pullrequestreview-3535353659