> About __svc_clean_idle() (which I haven't looked at), will it ever
> be called on a user-supplied fd set?

No, at least not unless something outside the libc rpc stuff calls it
(which I assume should never happen).

> Symbol versioning will probably cover the problems, though.

As far as I can see, the only exported interface that uses fd_set is
svc_getreqset, and yes, I believe symbol versioning can handle it.

>>> Use kevent().  [...]
>> [...]
> Try looking in /usr/src/lib/libc/sys, specifically at
> /usr/src/lib/libc/sys/kqueue.2, which gets installed as both kqueue.2
> and kevent.2.

Yes, I found that after seeing thorpej's note - I did a full sweep for
*.2 files and grepped them for kevent.  Looks as though it transposes
the complexity matrix, basically.

> Additionally, since there is a timer event filter, you can make it so
> that you don't need to pass in a timeout to the call; you'll just
> have a filter go off each time it expires.

Yes, I noticed that - it would serve many of the same timing ends that
AF_TIMER sockets do....

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