> What's the driving need to rip out functionality?

Well, in this case of the ring it's an irritation to have to massage the
tracking of events into the ring format when you, say, back the aio
implementation with syslets.  If it were just queueing up results for
io_getevents(), which can lock in the kernel, we'd have more freedom.

It's a nit, don't get me wrong.

> Why not actually submit 
> some more in kernel implementations of aio and then evaluate if the api 
> really needs to be ripped out or not (and use syslets or whatever to 
> implement 
> them)?

Don't ask me, ask the subsystem maintainers who have not chosen to do
this over the last N years.

- z

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