How can you combine AIO and epoll together in a single event loop?
Google finds lots of talk from 2002 and 2003 about unifying them, but its unclear if anything happened, or if it's possible.
Has anyone rolled-their-own with an epoll loop using eventfd for the aio signal?
Tried eventfd with epoll?
you can see http://www.xmailserver.org/eventfd-aio-test.c for a sample of aio and eventfd
FreeBSD supports AIO together with Kqueue, the AIO completion can be monitored by the Kqueue interface.
try libevent:
http://www.monkey.org/~provos/libevent/
there are patches to support both.