On Sun, 2 Mar 2008, Sam Varshavchik wrote: > Hijacking this epoll thread, the following related question occurs to me: > > #Q8 > # Does an operation on a file descriptor affect the already collected but > #not yet reported events? > # > #A8 > # You can do two operations on an existing file descriptor. Remove would > #be meaningless for this case. Modify will re-read available I/O. > > Why is EPOLL_CTL_DEL considered meaningless? A process is wrapping up its > business and is preparing to remove the fd from the epoll set, and then close > the file descriptor itself. In the meantime, the fd became readable, and a > POLLIN event gets collected. So, what happens to the collected event, when the > EPOLL_CTL_DEL operation is made? Any epoll_wait() done after the POLLIN and before the EPOLL_CTL_DEL, will show up. After the EPOLL_CTL_DEL, of course, no events will be reported. - Davide -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
