RFR: 8265268: Unify ReservedSpace reservation code in initialize and try_reserve_heap [v2]

[Stefan Johansson]

On Thu, 22 Apr 2021 16:00:39 GMT, Ivan Walulya <iwalulya at openjdk.org> wrote:

>> Stefan Johansson has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Thomas and Ivan review
>
> Marked as reviewed by iwalulya (Committer).

Thanks @walulyai and @tschatzl for reviewing.

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PR: https://git.openjdk.java.net/jdk/pull/3570