Date: 17 Mar 2001 16:50:16 +0100 From: Dag-Erling Smorgrav <des@ofug.org> To: Maxime Henrion <mux@qualys.com> Cc: arch@FreeBSD.ORG Subject: Re: Proposal for a new syscall Message-ID: <xzpzoekcs3r.fsf@flood.ping.uio.no> In-Reply-To: Maxime Henrion's message of "Sat, 17 Mar 2001 16:44:11 %2B0100" References: <20010317164411.A420@nebula.cybercable.fr>
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Maxime Henrion <mux@qualys.com> writes: > While I was writing a network application, I was thinking that it would > be nice to have a syscall that could "bind" two file descriptors, of any > type (socket, file...), a bit like funopen() does in the libc. You don't seem to understand what funopen() really does... > Having > such a syscall in the kernel would allow to implement "zero-copy" > wherever it is feasible. No. It would save you two copies and a bunch of syscalls, but it wouldn't be real zero-copy, just "n-2 copy" instead of "n copy". > Then, sendfile() would just be a particular case of this syscall, where > the input fd is a file and the output fd is a socket, and it could be > rewritten using it. No. Have you looked at the sendfile() code? DES -- Dag-Erling Smorgrav - des@ofug.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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