From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 22 Aug 2001 07:08:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 22 Aug 2001 07:08:44 -0400 Received: from dial249.pm3abing3.abingdonpm.naxs.com ([216.98.75.249]:51461 "EHLO ani.animx.eu.org") by vger.kernel.org with ESMTP id ; Wed, 22 Aug 2001 07:08:26 -0400 Date: Wed, 22 Aug 2001 07:12:13 -0400 From: Wakko Warner To: Luca Montecchiani Cc: Linux Kernel Subject: Re: [FAQ?] More ram=less performance (maximum cacheable RAM) Message-ID: <20010822071213.A9273@animx.eu.org> In-Reply-To: <3B82B988.50DE308A@iname.com> <200108211957.f7LJvEt20846@vindaloo.ras.ucalgary.ca> <998430817.3139.41.camel@phantasy> <3B8350D3.CDE749E1@iname.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.95.3i In-Reply-To: <3B8350D3.CDE749E1@iname.com>; from Luca Montecchiani on Wed, Aug 22, 2001 at 08:27:31AM +0200 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > > > > It also has nothing to do with Linux. Some motherboard's TAG RAM do not > > allow for caching more than xMB. > > I'm just proposing to update the FAQ to help people like me > that thinking to gain speed doubling the system ram have seen > a severe performance drop for certain task like compiling the > kernel . > > Answer : > It has nothing to do with Linux, maybe your motherboard's TAG Ram > do not allow for caching more than xMB. The bios has something to do with that as well. I have a dual pentium machine at work that was really slow. I looked in the bios and it has an option to cache 64mb or 512mb. speed up my kernel compiles (2.2.x) by about 12 minutes. (took 20, after the change, it took about 8) -- Lab tests show that use of micro$oft causes cancer in lab animals