RFR: 8278598: AlignmentReserve is repeatedly reinitialized

[Thomas Schatzl]

On Wed, 1 Jun 2022 15:26:30 GMT, Ivan Walulya <iwalulya at openjdk.org> wrote:

>> Hi all,
>> 
>>   can I have reviews for this change that makes initialization of `AlignmentReserve` a one-time thing; after looking at the suggested change and the code I opted to use a static in `CollectedHeap` that can be queried by its users (`PLAB` and `ThreadLocalAllocBuffer`). This seemed nicer to me.
>> 
>> Testing: gha, running gcbasher with all collectors (notice that there is an assert in the getter that checks for initialization before retrieval, so this should be sufficient)
>> 
>> Thanks,
>>   Thomas
>
> Lgtm!

Thanks @walulyai @albertnetymk for your reviews

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PR: https://git.openjdk.java.net/jdk/pull/8808