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Message-ID: <20071027104627.GA26748@schmorp.de> Date: Sat, 27 Oct 2007 12:46:28 +0200 From: Marc Lehmann <schmorp@...morp.de> To: Eric Dumazet <dada1@...mosbay.com> Cc: Marc Lehmann <linux-kernel@....eu>, linux-kernel@...r.kernel.org, Davide Libenzi <davidel@...ilserver.org> Subject: Re: epoll design problems with common fork/exec patterns On Sat, Oct 27, 2007 at 12:23:52PM +0200, Eric Dumazet <dada1@...mosbay.com> wrote: > > Q6 Will the close of an fd cause it to be removed from all epoll > > sets automatically? > > A6 Yes. > > Answer : epoll documentation cannot explain the full semantic of file epoll documentation easily can. there is nothig keeping it from it. don't make silly arguments like that. > Or should, since you had problems You are again implying I lakc understanding. That is, however, not true. I don't see the point in being insulted by you, so I won'T continue talking to you :( > The 'close' of a file is not close(fd) :) Good that you understand that. That is one of my problems, as the manpage talks about closing of the fd, but there are multiple ways to do that, and some are not handled the same way. > epoll has to deal with files, but documentation is a User side > documentation, so has to use 'file descriptors'. There is obviously no need for documentation to do that, contrary to your claim. The manpages for e.g. dup or the official sus manpages manage to document it (mostly) correctly, so your claim that documentation must use file descriptors when the underlying file structure is meant is disproven. > fork() is acting sort of dup() , as it increases all file refcounts. > > You have problems about close()/dup()/fork()/... file descriptors semantic, > which is handled by a layer independent from epoll stuff. No, I have no problem with dup at all. I have a problem with explicitlx closing file descriptors in the child will stop events for those files to be reported in the parent. I am sorry, but I epxlained this very clearly a number of times, but for some reason, apart from accusing me to not understanding files and file descritpors or (clear enough) documentation, you ignore that and instead hammer on other problems. To me, it seems you are not the one who understands. -- The choice of a Deliantra, the free code+content MORPG -----==- _GNU_ http://www.deliantra.net ----==-- _ generation ---==---(_)__ __ ____ __ Marc Lehmann --==---/ / _ \/ // /\ \/ / pcg@...f.com -=====/_/_//_/\_,_/ /_/\_\ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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