From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 19 Aug 2002 10:27:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 19 Aug 2002 10:27:44 -0400 Received: from smtp03.web.de ([217.72.192.158]:20773 "EHLO smtp.web.de") by vger.kernel.org with ESMTP id convert rfc822-to-8bit; Mon, 19 Aug 2002 10:27:43 -0400 To: linux-kernel@vger.kernel.org Subject: Re: kernel panic while cd writing References: <20020817203010.GA251@poczta.gazeta.pl> X-Face: 8omYku?tAexGd1v,5cQg?N#5RsX"8\+(X=8o[ Ve)k4kR)7DN3VM-`_LiF(jfij'tPzNFf|MK|vL%Z9_#[ssfD[=mFaBy]?VV0&vLi09Jx*:)CVQJ*e3 Oyv%0J(}_6 Date: Mon, 19 Aug 2002 16:30:09 +0200 Message-ID: <873ctaudji.fsf@plailis.homelinux.net> User-Agent: Gnus/5.090008 (Oort Gnus v0.08) Emacs/21.3.50 (i686-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-2 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi Justyna! * Justyna Biała writes: >Hi. >I have LiteOn 40x12x48x cd-writer, linux 2.4.19, cdrecord 1.11a24, >Duron 1000 MHz, ECS K7S5A with SIS735 chipset. My cd-writer works fine >only in two cases: I also have a ECS K7S5A, but I have an acer 2010A cd-writer. >1. when the speed is not higher than 12x (no matter if the dma is on) >2. with speed = 32x but only when I turn the dma off with hdparm My problem was, that the system load was almost unbearable at higher speeds, but only when I was burning DAO. Do you burn DAO? Is your system load (top) also very high? Now I just upgraded to 2.4.20-pre3 and everything is just fine :-) I am not really sure if it was only the kernel, because I still have the same problem when I tell the kernel to umask the drive's IRQ (hdparm -u1). I am not 100% sure if I tried it without umask before. But without umask, everything seems to work fine now. There's just a few percent CPU load when doing c2scan or writing DAO. The only thing is that if I do a c2scan under X, X consumes all my CPU time after some time and gets unresponsive. Doing the same in the console there's no problem at all. So I am pretty sure this is a X problem and not the kernel's. regards Markus