From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 9 Jan 2001 10:38:14 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 9 Jan 2001 10:38:04 -0500 Received: from chiara.elte.hu ([157.181.150.200]:15116 "HELO chiara.elte.hu") by vger.kernel.org with SMTP id ; Tue, 9 Jan 2001 10:37:52 -0500 Date: Tue, 9 Jan 2001 16:37:26 +0100 (CET) From: Ingo Molnar Reply-To: To: "Stephen C. Tweedie" Cc: Rik van Riel , "David S. Miller" , , , Subject: Re: [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1 In-Reply-To: <20010109151725.D9321@redhat.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 9 Jan 2001, Stephen C. Tweedie wrote: > Jes has also got hard numbers for the performance advantages of > jumbograms on some of the networks he's been using, and you ain't > going to get udp jumbograms through a page-by-page API, ever. i know the performance advantages of jumbograms (typically when it's over a local network), it's undisputed. Still i dont see why it should be impossible to do effective UDP via a single-page interface. Eg. buffering of outgoing pages could be supported, and MSG_MORE in sendmsg() used to indicate end of stream. This is why ->writepage() has a 'more' flag (and tcp_sendpage() has a flag as well). Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/