Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 28 Jan 2002 08:54:08 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 28 Jan 2002 08:54:00 -0500 Received: from natpost.webmailer.de ([192.67.198.65]:6901 "EHLO post.webmailer.de") by vger.kernel.org with ESMTP id ; Mon, 28 Jan 2002 08:53:44 -0500 Date: Mon, 28 Jan 2002 14:51:54 +0100 From: Kristian To: Andrew Morton Cc: ed.sweetman@wmich.edu, linux-kernel@vger.kernel.org Subject: Re: [CFT] Bus mastering support for IDE CDROM audio Message-Id: <20020128145154.6437b39b.kristian.peters@korseby.net> In-Reply-To: <3C550BD4.E9CBE6A@zip.com.au> In-Reply-To: <20020127111917.3c019701.kristian.peters@korseby.net> <3C5119E0.6E5C45B6@zip.com.au> <000701c1a5d5$812ef580$6caaa8c0@kevin> <3C53711B.F8D89811@zip.com.au> <3C53A116.81432588@zip.com.au> <20020127101131.0f71e978.kristian.peters@korseby.net> <20020127111917.3c019701.kristian.peters@korseby.net> <1012161271.22707.50.camel@psuedomode> <3C550BD4.E9CBE6A@zip.com.au> X-Mailer: Sylpheed version 0.7.0claws5 (GTK+ 1.2.10; i386-redhat-linux) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Andrew Morton wrote: > OK, Gents. Version three is at > > http://www.zip.com.au/~akpm/linux/2.4/2.4.18-pre7/ide-akpm-3.patch > > This attempts to overcome the situation where a drive/controller > doesn't want to perform multiframe DMA, but is happy performing > single-frame DMA. > [...] The third patch works fine. When I'm doing "hdparm -c0 /dev/hdc" (16bit I/O) the system respond-ratio gets very low. (with all ide-cd-patches) I can see when gtk draws it's icons... But when I switch I/O back to 32 bit linux gets responsive again and cpu load decreases (~20%). Tested with 2.4.18-pre3-ac2 and 2.4.17-lowlat-ide. *Kristian :... [snd.science] ...: :: :: http://www.korseby.net :: http://gsmp.sf.net :.........................:: ~/$ kristian@korseby.net : - 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/