RFR: 8284995: G1: Do not mark through Closed Archive regions during concurrent mark [v2]

[Albert Mingkun Yang]

On Wed, 20 Apr 2022 10:59:12 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> Hi all,
>> 
>>   please review this change that skips CA regions during concurrent mark. This is achieved by keeping the ntams at bottom for these regions.
>> G1 Full GC already skips marking of CA regions.
>> 
>> Testing: tier1-5
>> 
>> Thanks,
>>   Thomas
>
> Thomas Schatzl has updated the pull request incrementally with one additional commit since the last revision:
> 
>   iwalulya review, fix typo

Marked as reviewed by ayang (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/8315