Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261168AbTEER1v (ORCPT ); Mon, 5 May 2003 13:27:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261179AbTEER1u (ORCPT ); Mon, 5 May 2003 13:27:50 -0400 Received: from mail.ithnet.com ([217.64.64.8]:34312 "HELO heather.ithnet.com") by vger.kernel.org with SMTP id S261168AbTEER1s (ORCPT ); Mon, 5 May 2003 13:27:48 -0400 Date: Mon, 5 May 2003 19:26:52 +0200 From: Stephan von Krawczynski To: Karsten Keil Cc: alan@lxorguk.ukuu.org.uk, kai@tp1.ruhr-uni-bochum.de, linux-kernel@vger.kernel.org Subject: Re: ISDN massive packet drops while DVD burn/verify Message-Id: <20030505192652.7f17ea9e.skraw@ithnet.com> In-Reply-To: <20030505164653.GA30015@pingi3.kke.suse.de> References: <20030416151221.71d099ba.skraw@ithnet.com> <20030419193848.0811bd90.skraw@ithnet.com> <1050789691.3955.17.camel@dhcp22.swansea.linux.org.uk> <20030505164653.GA30015@pingi3.kke.suse.de> Organization: ith Kommunikationstechnik GmbH X-Mailer: Sylpheed version 0.8.11 (GTK+ 1.2.10; i686-pc-linux-gnu) 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 Content-Length: 1563 Lines: 43 On Mon, 5 May 2003 18:46:53 +0200 Karsten Keil wrote: > > How did we manage to become that bad? > > Its not so bad, the problem is how do you tune the system. If you prefer to > not interrupt the IDE transfers, which seems to be the default case, you > loose IRQ latency, which doesn't matter in much cases, but not on > this. You can tune it (hdparm work also with cdwriters, since > even if it use ide-scsi, the underlying driver is the ide driver. You mean UDMA 2 does not make it (which I had in the test case)? # hdparm -i /dev/hdc /dev/hdc: Model=SONY DVD RW DRU-500A, FwRev=2.0c, SerialNo=DA5B9D3D Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic } RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0 BuffType=unknown, BuffSize=0kB, MaxMultSect=0 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0 IORDY=on/off, tPIO={min:180,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 mdma2 UDMA modes: udma0 udma1 *udma2 AdvancedPM=no Drive conforms to: device does not report version: 4 5 6 > This all don't say that here maybe also other problems around, but I have no > better explanation. Hm, this looks like the unresolved sleeping AVM Fritz2 syndrome to me: no idea of what's really going on ... -- Regards, Stephan - 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/