Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 20 Dec 2000 12:14:26 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 20 Dec 2000 12:14:16 -0500 Received: from avalon.student.liu.se ([130.236.230.76]:34472 "EHLO mail.student.liu.se") by vger.kernel.org with ESMTP id ; Wed, 20 Dec 2000 12:14:02 -0500 Message-ID: <3A40E1B1.88008025@student.liu.se> Date: Wed, 20 Dec 2000 17:43:29 +0100 From: Robert H?gberg X-Mailer: Mozilla 4.75 [en] (X11; U; Linux 2.2.18 i586) X-Accept-Language: en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: Extreme IDE slowdown with 2.2.18 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 Hello, I'm having problems with the performance of my harddrives after I upgraded my kernel from 2.2.17 to 2.2.18. The performancedrop is noticable on every IDE drive. Here are some numbers to show what I mean: 2.2.17: /dev/hdc: Timing buffered disk reads: 64 MB in 4.32 seconds =14.81 MB/sec 2.2.18: /dev/hdc: Timing buffered disk reads: 64 MB in 10.49 seconds = 6.10 MB/sec These are hdparm -t outputs and the performance drop is pretty noticable :-/ I also copied a 600Mb file from my HDD to /dev/null and the results were: 2.2.17: 1 minute 9 seconds 2.2.18: 1 minute 38 seconds My system consists of: FIC VA-503+ motherboard with the MVP3 chipset K6-2 500MHz 128Mb SDRAM 3 IDE disks (see below) Slackware 7.0 dmesg output for the IDE system (no differences between .17 and .18): VP_IDE: IDE controller on PCI bus 00 dev 39 VP_IDE: not 100% native mode: will probe irqs later ide0: BM-DMA at 0xe400-0xe407, BIOS settings: hda:DMA, hdb:DMA ide1: BM-DMA at 0xe408-0xe40f, BIOS settings: hdc:DMA, hdd:DMA hda: QUANTUM FIREBALL ST6.4A, ATA DISK drive hdb: QUANTUM FIREBALL SE4.3A, ATA DISK drive hdc: IBM-DJNA-352030, ATA DISK drive ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 ide1 at 0x170-0x177,0x376 on irq 15 hda: QUANTUM FIREBALL ST6.4A, 6149MB w/81kB Cache, CHS=784/255/63 hdb: QUANTUM FIREBALL SE4.3A, 4110MB w/80kB Cache, CHS=524/255/63 hdc: IBM-DJNA-352030, 19470MB w/1966kB Cache, CHS=39560/16/63 When I performed the tests I used similiar .17 and .18 kernels with a minimum components included. No network, SCSI, sound and such things. .config files can be supplied if needed. Does anyone know what could be wrong? Have I forgot something? Is this a known problem with the 2.2.18 kernel? Thanks in advance! Robert - 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/