From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422957AbWBOE4D (ORCPT ); Tue, 14 Feb 2006 23:56:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1422958AbWBOE4D (ORCPT ); Tue, 14 Feb 2006 23:56:03 -0500 Received: from smtp.osdl.org ([65.172.181.4]:17130 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S1422957AbWBOE4B (ORCPT ); Tue, 14 Feb 2006 23:56:01 -0500 Date: Tue, 14 Feb 2006 20:54:58 -0800 From: Andrew Morton To: "Nikolay N. Ivanov" Cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.15.x - very slow disk-writing Message-Id: <20060214205458.10328f36.akpm@osdl.org> In-Reply-To: <43F2D3A3.9030707@nndl.org> References: <43F0F67A.8080001@nndl.org> <20060213200517.20f7a291.akpm@osdl.org> <43F2BEE5.5060002@nndl.org> <20060214193121.752767ee.akpm@osdl.org> <43F2D3A3.9030707@nndl.org> X-Mailer: Sylpheed version 1.0.4 (GTK+ 1.2.10; i386-redhat-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 "Nikolay N. Ivanov" wrote: > > /dev/hda: > multcount = 16 (on) > IO_support = 0 (default 16-bit) > unmaskirq = 0 (off) > using_dma = 0 (off) > keepsettings = 0 (off) > readonly = 0 (off) > readahead = 256 (on) > geometry = 16383/255/63, sectors = 40060403712, start = 0 The disk isn't using DMA. Check your IDE config settings, make sure that the right chipset support is turned on, that "Generic PCI bus-master DMA support" is enabled, check "Force enable legacy 2.0.X HOSTS to use DMA", "Use PCI DMA by default when available", "Enable DMA only for disks", etc. If none of that gets it into DMA mode then we might have broken the IDE driver.