Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 7 Feb 2003 04:55:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 7 Feb 2003 04:55:29 -0500 Received: from matrix.roma2.infn.it ([141.108.255.2]:60305 "EHLO matrix.roma2.infn.it") by vger.kernel.org with ESMTP id ; Fri, 7 Feb 2003 04:55:27 -0500 Message-ID: <40163.141.108.16.102.1044612299.squirrel@webmail.roma2.infn.it> Date: Fri, 7 Feb 2003 11:04:59 +0100 (CET) Subject: Re: zero copy From: "Emiliano Gabrielli" To: , X-Priority: 3 Importance: Normal X-MSMail-Priority: Normal X-Mailer: SquirrelMail (version 1.2.7) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 735 Lines: 37 > > > Hi, > > What is zero copy mechanism in ethernet drivers. > > Regards > Venkat Zero copy is intended to bypass the need of copying the user space buffer in kernel space via copy_from_user. It is achieved by mapping dma buffer in user space for exaple so that eth driver can directly use them for dma -- Emiliano Gabrielli dip. di Fisica 2? Universit? di Roma "Tor Vergata" -- Emiliano Gabrielli dip. di Fisica 2? Universit? di Roma "Tor Vergata" - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/