Polling large file descriptor sets

It seems that /dev/epoll support will be included in 2.6. Is this the official way to solve the problem, or is there another, preferred interface I have missed? Is the current /dev/epoll edge-triggered or level-triggered?

Is the patch for 2.4.21 in sync with 2.6, API-wise? Can I run libevent with both kernels?

/dev/epoll is not included, but a similar interface using system calls, also called epoll, is provided. The new interface does both edge-triggering and level-triggering, as requested.

-- Jamie