RFR: Load balance remembered set scanning [v2]

[Kelvin Nilsen]

On Fri, 29 Jul 2022 16:54:45 GMT, William Kemper <wkemper at openjdk.org> wrote:

>> Kelvin Nilsen has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Respond to reviewer comments
>
> src/hotspot/share/gc/shenandoah/shenandoahScanRemembered.cpp line 155:
> 
>> 153:   // Last group does the remnant of heap, one _smallest_chunk_size at a time.
>> 154:   // Round down.
>> 155:   return _heap->num_regions() / 2;
> 
> I don't understand this comment. Is this a `TODO` comment? Or should this be `initial_group_size`?

I've rewritten the comment here in an attempt to make the intention more clear.

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PR: https://git.openjdk.org/shenandoah/pull/153