RFR: 8257774: G1: Trigger collect when free region count drops below threshold to prevent evacuation failures [v6]

[Aditya Mandaleeka]

On Thu, 20 May 2021 11:17:24 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> Aditya Mandaleeka has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Minor updates/feedback.
>
> According to the perf team that test is very susceptible to (c2) compilation order, so I think we can ignore this one.

Thanks @tschatzl. In that case, I think this is just waiting for formal signoffs at this point.

I'll also repeat a question I asked above a while ago:
> What are your thoughts on further steps involved before getting this change merged? For instance, is there value/interest in putting the proactive GCs behind an -XX: option? Every such flag adds complexity and surface area for testing, so I'm somewhat hesitant but I'm interested to hear others' opinions on this...

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PR: https://git.openjdk.java.net/jdk/pull/3143