Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932391AbVIJXtq (ORCPT ); Sat, 10 Sep 2005 19:49:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932392AbVIJXtq (ORCPT ); Sat, 10 Sep 2005 19:49:46 -0400 Received: from liszt-12.ednet.co.uk ([212.20.226.36]:32206 "EHLO liszt-12.ednet.co.uk") by vger.kernel.org with ESMTP id S932391AbVIJXtp (ORCPT ); Sat, 10 Sep 2005 19:49:45 -0400 Message-ID: <43237171.2080203@vtrl.co.uk> Date: Sun, 11 Sep 2005 00:51:13 +0100 From: Andrew Smith User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.10) Gecko/20050721 X-Accept-Language: en-gb, en-us, en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: kernel performance problem Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1194 Lines: 41 This is my first ever posting to this list, so please excuse me if I've f**cked up and broken protocol. I use an IDE LG DVD-RW drive for backup(GSA-4081B). Back around 2.6.10 it wrote at typically 1.6-1.7x speed, but thereafter it dropped to around 0.6-0.7 x. %hdparm -I /dev/hdd /dev/hdd: ATAPI CD-ROM, with removable media Model Number: HL-DT-ST DVDRAM GSA-4081B Serial Number: K2B3CFE4600 Firmware Revision: A100 Standards: Likely used CD-ROM ATAPI-1 Configuration: DRQ response: 50us. Packet size: 12 bytes Capabilities: LBA, IORDY(can be disabled) DMA: mdma0 mdma1 mdma2 udma0 udma1 *udma2 Cycle time: min=120ns recommended=120ns PIO: pio0 pio1 pio2 pio3 pio4 Cycle time: no flow control=120ns IORDY flow control=120ns HW reset results: CBLID- below Vih Device num = 1 -- Andrew - 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/