Vladimir, I think we should create some documentation for this socket option.
In JDK-8243099 you mention tests done with Apache Kafka so I assume that somebody has already modified Kafka to use this feature and maybe it would useful to document what was done and use that as a basis for something that we can turn into documentation. The context for asking is somebody showing up on net-dev in 2025 and asking for examples or more information on how to use this support option. Unlikely other socket options, this one may require significant changes to a framework or application, maybe when it selects the thread when dispatching a socket ready for I/O.
I think we should also include some of the commands used in any configuration. It doesn't need to be exhaustive but just listing one or two examples will help when somebody shows up with questions on how to use it.
I'm not sure yet where the best place to publish this documentation is (maybe the group/net area) but we can at least link to it from the release note that we'll need to create.
-Alan
