RFR: 8227369: pd_disjoint_words_atomic() needs to be atomic [v2]

[David Holmes]

On Wed, 23 Feb 2022 07:48:42 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> David Holmes has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Remove underscore from name
>
> Looks fine. There might be some performance implications to this, as IIRC this code gets called from GC copying, so some light benchmarking might be in order.

@shipilev any suggestions as to which benchmarks to try to run for this? Otherwise I'll just try our usual internal ones.

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PR: https://git.openjdk.java.net/jdk/pull/7567