From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 9 Feb 2001 16:44:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 9 Feb 2001 16:44:20 -0500 Received: from kerberos.suse.cz ([195.47.106.10]:8710 "EHLO kerberos.suse.cz") by vger.kernel.org with ESMTP id ; Fri, 9 Feb 2001 16:44:03 -0500 Date: Fri, 9 Feb 2001 22:44:00 +0100 From: Vojtech Pavlik To: Henryk Paluch Cc: linux-kernel@vger.kernel.org Subject: Re: [RESOLVED]: kernel hangs on CD-R HP8100i if compiled w/ VIA IDE Message-ID: <20010209224400.B3621@suse.cz> In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: ; from paluch@KMLinux.fjfi.cvut.cz on Fri, Feb 09, 2001 at 10:18:05PM +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Feb 09, 2001 at 10:18:05PM +0100, Henryk Paluch wrote: > Shortly: kernel (2.2.x, 2.4.x) hangs on CD-R HP8100i, VIA KT133 chipset > (w/ ATA100 support) if kernel is compiled with VIA IDE chipset support. > Please, see my previous post from 21 Jan 2001 for full description. > > After little tweaking via82cxxx.c driver I found, that the cause is > 'Prefetch Buffer: ' (/proc/ide/via) - if disabled for appropriate IDE > channel, everything works well. It also explains, why the kernel works > properly if VIA IDE support is not compiled in - BIOS leaves Prefetch > disabled (I hacked that driver a bit more to show chipset configuration > either before and after modification). > > So I have a little question: What could be a clean way, to make a kernel > option to disable prefetch for VIA (use something like 'ide1=noprefetch'?) > Any idea? Since version 2.30 of the VIA driver (2.4.2-pre2), the driver leaves prefetch as is set by BIOS. It seems that ATAPI devices need this set to off at least on some of the VIA chips. -- Vojtech Pavlik SuSE Labs - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/