From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 7 May 2001 14:48:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 7 May 2001 14:48:02 -0400 Received: from neon-gw.transmeta.com ([209.10.217.66]:20492 "EHLO neon-gw.transmeta.com") by vger.kernel.org with ESMTP id ; Mon, 7 May 2001 14:47:51 -0400 To: linux-kernel@vger.kernel.org From: "H. Peter Anvin" Subject: Re: Wow! Is memory ever cheap! Date: 7 May 2001 11:47:34 -0700 Organization: Transmeta Corporation, Santa Clara CA Message-ID: <9d6qk6$i86$1@cesium.transmeta.com> In-Reply-To: <20010505095802.X12431@work.bitmover.com> <20010506142043.B31269@metastasis.f00f.org> <20010505194536.D14127@work.bitmover.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Disclaimer: Not speaking for Transmeta in any way, shape, or form. Copyright: Copyright 2001 H. Peter Anvin - All Rights Reserved Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Followup to: <20010505194536.D14127@work.bitmover.com> By author: Larry McVoy In newsgroup: linux.dev.kernel > > On Sun, May 06, 2001 at 02:20:43PM +1200, Chris Wedgwood wrote: > > 1.5GB without ECC? Seems like a disater waiting to happen? Is ECC > > memory much more expensive? > > Almost twice as expensive for 512MB dimms. > > I used to be a die hard ECC fan but that changed since what we do here is > BitKeeper and BitKeeper checksums everything. It tells us right away when > we have problems (to date it has found bad memory dimms, NFS corruption, > and a SPARC/Linux cache aliasing bug). So I've given up in ECC, we don't > need it. > > On the other hand, if your apps don't have built in integrity checks then > ECC is pretty much a requirement. > Isn't this pretty much saying "if you're willing to dedicate your system to running nothing but Bitkeeper, you can run it really fast?" -hpa -- at work, in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt