From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S271239AbTHCStr (ORCPT ); Sun, 3 Aug 2003 14:49:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S271231AbTHCSsh (ORCPT ); Sun, 3 Aug 2003 14:48:37 -0400 Received: from mx1.it.wmich.edu ([141.218.1.89]:4792 "EHLO mx1.it.wmich.edu") by vger.kernel.org with ESMTP id S271233AbTHCSqx (ORCPT ); Sun, 3 Aug 2003 14:46:53 -0400 Message-ID: <3F2D589B.8000407@wmich.edu> Date: Sun, 03 Aug 2003 14:46:51 -0400 From: Ed Sweetman User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3) Gecko/20030722 X-Accept-Language: en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org CC: Tom Felker Subject: Re: Fast DMA CD audio extraction References: <200308031259.29704.tcfelker@mtco.com> <3F2D5843.4040105@wmich.edu> In-Reply-To: <3F2D5843.4040105@wmich.edu> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Ed Sweetman wrote: > Tom Felker wrote: > >> Hi, >> >> I'm trying to get decent performance (e.g. DMA, not PIO) extracting >> audio with cdparanoia from an new IDE CD-ROM. The current problem is >> very slow ripping and very high system CPU time. hdparm reports DMA >> is on, and reading data is perfectly fast. >> >> What kernel versions and patches should I be trying? >> >> (Please cc: me, emailing in reply to linux.kernel posts munges threading) >> Thanks, >> Correction, magellon's tree, designated by the -jam extension. > akpm's kernel trees have the ide-dma patch that enables dma in raw mode. > Works quite nicely but i'd only use it on really prestine cds. DMA by > it's nature doesn't give the best error reporting when dealing with raw > data cds like audio cds. I've never had a problem with it though, even > on cds with scratches. >