RFR: 8253286: Use expand_exact() instead of expand_at() for fixed requests in G1 [v3]

Mon Sep 21 11:47:32 UTC 2020

On Mon, 21 Sep 2020 11:26:01 GMT, Stefan Johansson <sjohanss at openjdk.org> wrote:

>>> I would like this change to only address how we expand the found regions.
>> 
>> Sure.
>> 
>> Thank you for the explanation. I think we have reached an agreement here; please update the pre-call comments and
>> post-call assert as discussed above. Thank you again.
>
> Thanks! I also filed [JDK-8253420](https://bugs.openjdk.java.net/browse/JDK-8253420) for the `find_highest_free()`
> refactoring.

Thank you.

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PR: https://git.openjdk.java.net/jdk/pull/235