RFR: 8286829: Shenandoah: fix Shenandoah Loom support [v2]

[Zhengyu Gu]

On Mon, 30 May 2022 07:06:29 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Zhengyu Gu has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Aleksey's comment
>
> src/hotspot/share/gc/shenandoah/shenandoahConcurrentGC.cpp line 529:
> 
>> 527:   heap->set_concurrent_mark_in_progress(true);
>> 528: 
>> 529:   _mark.start_mark();
> 
> Style: call `start_mark()` here maybe? Matches the use of `end_mark()` elsewhere.

Okay. I am award of asymmetry, but not sure this is better.

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PR: https://git.openjdk.java.net/jdk/pull/8924