RFR: 8322751: ZGC: Fix comments about marking roots

[Guoxiong Li]

On Wed, 27 Dec 2023 09:05:21 GMT, Erik Österlund <eosterlund at openjdk.org> wrote:

>> Hi all,
>> 
>> This trivial patch fixes comments about marking roots.
>> 
>> Thread-stack processing has been concurrent after [JDK-8253180](https://bugs.openjdk.org/browse/JDK-8253180).
>> And the code about marking root in `ZMark::start` has been removed after [JDK-8254562](https://bugs.openjdk.org/browse/JDK-8254562).
>> But some comments in ZGC and generational ZGC have not fixed, which may mislead the newbies of the ZGC.
>> 
>> Thanks for review.
>> 
>> Best Regards,
>> -- Guoxiong
>
> Marked as reviewed by eosterlund (Reviewer).

@fisk Thanks for your review. Do you think this patch is trivial? If not, I will wait for another review.

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PR Comment: https://git.openjdk.org/jdk/pull/17195#issuecomment-1873606710