RFR: 8374170: I/O Poller updates

[Alan Bateman]

On Sun, 1 Feb 2026 09:34:58 GMT, Alan Bateman <alanb at openjdk.org> wrote:

>> The I/O Poller used to support virtual threads doing blocking networking I/O has been significantly refactored in the loom repo. There are several improvements that should be brought to main line:
>> 
>> 1. New poller mode that uses a read poller per carrier, this is beneficial in some workloads.
>> 2. Better cleanup/recovery in the event if a file descriptor or memory can't be allocated during initializatio.
>> 3. NativeThread changed to cache native thread ID and avoid JNI call to current0 for each blocking I/O op.
>> 
>> Testing: tier1 + tier2.
>
> @MBaesken I hope to make this PR "ready for review" soon. Would you be able to check that it builds on AIX?

> Hi @AlanBateman , sure I can add it to our build/test queue . Should I do so now?

If you could, that would be great, as I have no way to test changes to AIX specific code.

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PR Comment: https://git.openjdk.org/jdk/pull/29195#issuecomment-3833713674