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

[Thomas Schatzl]

On Tue, 30 Sep 2025 19:13:51 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> 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).

Thanks @albertnetymk @walulyai for your reviews

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PR Comment: https://git.openjdk.org/jdk/pull/27575#issuecomment-3355214709