From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 29 Apr 2001 07:19:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 29 Apr 2001 07:19:28 -0400 Received: from www.linux.org.uk ([195.92.249.252]:5135 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id ; Sun, 29 Apr 2001 07:19:15 -0400 Date: Sun, 29 Apr 2001 12:18:41 +0100 From: Russell King To: "David S. Miller" Cc: linux-kernel@vger.kernel.org Subject: Re: Zerocopy implementation issues Message-ID: <20010429121841.F30243@flint.arm.linux.org.uk> Mail-Followup-To: Russell King , "David S. Miller" , linux-kernel@vger.kernel.org In-Reply-To: <20010429005206.J21792@flint.arm.linux.org.uk> <15083.40318.158099.137018@pizda.ninka.net> <20010429072342.B30041@flint.arm.linux.org.uk> <15083.52835.992666.897323@pizda.ninka.net> <20010429101739.D30243@flint.arm.linux.org.uk> <20010429113122.E30243@flint.arm.linux.org.uk> <15083.62888.860815.889046@pizda.ninka.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <15083.62888.860815.889046@pizda.ninka.net>; from davem@redhat.com on Sun, Apr 29, 2001 at 04:06:16AM -0700 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Apr 29, 2001 at 04:06:16AM -0700, David S. Miller wrote: > I understand that you are frustruated about this and it > requires you to touch some delicate assembly. But I'm > going to be blunt and say "tough", because everyone has > to implement this correctly. Just do it and get it > over with. I'm doing it _NOW_, but I'm having to rotate the checksum at the end if dst & 1, only to have it unrotated in an inefficient manner in csum_block_*. Seems a bit of a waste of CPU cycles. -- Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux http://www.arm.linux.org.uk/personal/aboutme.html