Messages in this thread | | | Date | Mon, 14 Jul 2003 04:04:37 +0100 | From | Jamie Lokier <> | Subject | Re: POLLRDONCE optimisation for epoll users (was: epoll and half closed TCP connections) |
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Davide Libenzi wrote: > Ouch, I definitely liked more the POLLHUP thing. It is not linked to epoll > at all.
POLLRDONCE isn't linked to epoll - it's a valid hint for poll/select too.
It means something different, i.e. you can't write:
> if (events & EPOLLRDHUP) { > d->flags |= HANGUP; > schedule_removal(d); > }
Be careful, because that isn't valid if there is urgent data. You need to check POLLPRI too. Granted urgent data is usually best ignored :)
If fast hangup is a useful optimisation too, we should have both flags. (However calling read() doesn't seem like a great penalty for that).
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