RFR: 8274516: [REDO] JDK-8271880: Tighten condition for excluding regions from collecting cards with cross-references [v2]

[Thomas Schatzl]

On Tue, 5 Oct 2021 09:29:53 GMT, Stefan Johansson <sjohanss at openjdk.org> wrote:

>> Thomas Schatzl has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   sjohanss review
>
> src/hotspot/share/gc/shared/referenceProcessor.cpp line 266:
> 
>> 264:   } else {
>> 265:     RawAccess<>::oop_store(_prev_discovered_addr, new_next);
>> 266:   }
> 
> What do you think about switching the if-statement around and add a comment explaining why we special case the head?

I prefer to keep the common case as first option. Added a comment to it though.

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PR: https://git.openjdk.java.net/jdk/pull/5786