RFR: 8371701: Add ability to set NUMA-affinity for threads [v2]

[Joel Sikström]

On Wed, 12 Nov 2025 14:56:57 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Yes we ignore the return value in https://github.com/openjdk/jdk/pull/28262 since the algorithm and functionality works if setting the affinity would fail for some reason. If the return type is false a user could bail or revert to some other strategy. I added the boolean return type as a way for users to have insight into the actual result of the operation, if they care.
>
> NUMA affinity is a performance hint, not a requirement. Callers can’t meaningfully react to failure -- retry is unlikely to succeed, and there’s no feasible fallback strategy in most contexts.
> 
>> since the algorithm and functionality works if setting the affinity would fail
> 
> I can't think of a scenario where numa-affinity affects correctness.
> 
> Ofc, this is very subjective. Up to you.

I see what you're saying. I'll change the return type to void instead.

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PR Review Comment: https://git.openjdk.org/jdk/pull/28261#discussion_r2518912853