Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964955AbVLFMJc (ORCPT ); Tue, 6 Dec 2005 07:09:32 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964956AbVLFMJc (ORCPT ); Tue, 6 Dec 2005 07:09:32 -0500 Received: from wproxy.gmail.com ([64.233.184.196]:14116 "EHLO wproxy.gmail.com") by vger.kernel.org with ESMTP id S964955AbVLFMJb convert rfc822-to-8bit (ORCPT ); Tue, 6 Dec 2005 07:09:31 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=gDgxVstD/IU9lxfz0m/gAWjFGYKifXSHj+bxuv08SXNs3FNPDtfDmZiiarkKRe3fciLEpCX52aLoWJ1UFTksgEpf0Sq2cJagXpZKqLN5i6Nf799tfifOdzYH07oKLYtfK/em/AxovYtzHe44Un2e4tB+fpy7Zbza8TKM+4Wj844= Message-ID: Date: Tue, 6 Dec 2005 04:09:30 -0800 From: kernel coder To: linux-kernel@vger.kernel.org Subject: zero copy MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 613 Lines: 15 hi, i'm trying to track the code flow of sendfile system call.Mine ethernet card doesn't have scatter gather and checksum calculation features.So stack should be making a copy of data. Please tell me where in sendfile code flow,check for scatter gather and cecksum features is made so that stack can decide whether to copy data from user space or not. lhrkernelcoder - 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/