RFR: 8300127: Serial: Remove unnecessary from-space iteration in DefNewGeneration::oop_since_save_marks_iterate [v2]

[Albert Mingkun Yang]

On Wed, 25 Jan 2023 20:12:04 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Converting no-ops to assertions in young-gen obj iteration.
>> 
>> Test: hotspot_gc
>
> Albert Mingkun Yang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   review

Thanks for the review.

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PR: https://git.openjdk.org/jdk/pull/11995