RFR: 8368953: Document the reason why Serial/Parallel/G1 use zero as dirty card value [v2]

[Albert Mingkun Yang]

On Tue, 30 Sep 2025 13:15:57 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> Hi all,
>> 
>>   please review this trivial change to document the reason for the dirty/clean card value selection.
>> 
>> Testing: local compilation
>> 
>> Thanks,
>>   Thomas
>
> Thomas Schatzl has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - Update src/hotspot/share/gc/shared/cardTable.hpp
>  - Update src/hotspot/share/gc/shared/cardTable.hpp

Marked as reviewed by ayang (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/27575#pullrequestreview-3286384640