RFR: GitHub Actions [v4]

[Jesper Wilhelmsson]

On Fri, 6 May 2022 23:11:21 GMT, Phil Race <prr at openjdk.org> wrote:

>> Jesper Wilhelmsson has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Fix
>
> 1) Conversely to Magnus' point it might build with GHA but not with OpenJDK recommended tool chains.
> Still this is STREETS ahead of you not building at all on Windows (say) since you don't have access.
> 
> 2) You could say that you can get *some* idea of what tier1 means for hotspot and libraries by looking at  the jtreg TEST.groups files in the repo (you can provide links) and  you'll quickly see that many important tests and whole areas are not  covered at all by tier1.

Yes, I think you have a good point here @prrace. I've added a note about running platforms one may not otherwise have access to and mentioned the TEST.groups files with a link.

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PR: https://git.openjdk.java.net/guide/pull/80