quoted

	int kevent_getevents(int event_fd, struct ukevent *events,
		int min_events, int max_events,
		struct timeval *timeout);

I used only one syscall for all operations, above syscall is
essentially what kevent_user_wait() does.

Essentially, yes, but the differences are important.  It's important to
have a clear syscall interface instead of nesting through multiplexers.
 And we should get the batching/latency inputs right.  (I'm for both
min/max elements and arguably timeouts, but I could understand not
wanting to go *that* far.)

Hmm, it looks like I'm lost here...

Yeah, it seems my description might not have sunk in :).  We're giving
userspace a way to collect events without performing a system call.

I especially like idea about world happinness in a week or so :)

A few weeks! :)

- z