From owner-freebsd-amd64@FreeBSD.ORG Mon Nov 8 23:21:25 2004 Return-Path: Delivered-To: freebsd-amd64@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 34D0616A4CF for ; Mon, 8 Nov 2004 23:21:25 +0000 (GMT) Received: from mail2.speakeasy.net (mail2.speakeasy.net [216.254.0.202]) by mx1.FreeBSD.org (Postfix) with ESMTP id F15A643D3F for ; Mon, 8 Nov 2004 23:21:24 +0000 (GMT) (envelope-from jmg@hydrogen.funkthat.com) Received: (qmail 23085 invoked from network); 8 Nov 2004 23:21:24 -0000 Received: from gate.funkthat.com (HELO hydrogen.funkthat.com) ([69.17.45.168]) (envelope-sender ) by mail2.speakeasy.net (qmail-ldap-1.03) with SMTP for ; 8 Nov 2004 23:21:24 -0000 Received: from hydrogen.funkthat.com (bmtuhk@localhost.funkthat.com [127.0.0.1])iA8NLJB6042577; Mon, 8 Nov 2004 15:21:21 -0800 (PST) (envelope-from jmg@hydrogen.funkthat.com) Received: (from jmg@localhost) by hydrogen.funkthat.com (8.12.10/8.12.10/Submit) id iA8NLIW0042576; Mon, 8 Nov 2004 15:21:18 -0800 (PST) Date: Mon, 8 Nov 2004 15:21:18 -0800 From: John-Mark Gurney To: Claus Guttesen Message-ID: <20041108232118.GD73306@funkthat.com> Mail-Followup-To: Claus Guttesen , "Michael R. Wayne" , freebsd-amd64@freebsd.org References: <20041108191947.GA49800@manor.msen.com> <20041108193720.15976.qmail@web14102.mail.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20041108193720.15976.qmail@web14102.mail.yahoo.com> User-Agent: Mutt/1.4.1i X-Operating-System: FreeBSD 4.2-RELEASE i386 X-PGP-Fingerprint: B7 EC EF F8 AE ED A7 31 96 7A 22 B3 D8 56 36 F4 X-Files: The truth is out there X-URL: http://resnet.uoregon.edu/~gurney_j/ X-Resume: http://resnet.uoregon.edu/~gurney_j/resume.html cc: freebsd-amd64@freebsd.org Subject: Re: How to debug >2GB memory issues (and 3ware) X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: John-Mark Gurney List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Nov 2004 23:21:25 -0000 Claus Guttesen wrote this message on Mon, Nov 08, 2004 at 20:37 +0100: > > I have a Dual 4GB system with a 3ware SATA > > controller that's working > > properly as long as I restrict it to 2GB with: > > hw.physmem=2G > > Obviously, I'd like to have access to the other 2GB > > of RAM. But > > if I go past 2GB, I get random crashes during all > > builds (world, > > kernel, port). > > I can't help you with that particular question, but I > had issues with a Dell-server and 4 GB RAM which was > resolved the same way. Maybe a list of drivers that > are 2GB-, 4GB-ready etc. It's getting more and more > common to have 4+ GB. Not sure about 2GB, since that seems like someone is handling a signed value incorrectly or something like that, but there is the busdma status page at: http://www.freebsd.org/projects/busdma/ If the driver has been busdma'ified, then it should handle >4GB memory w/o troubles.. If it is still having data corruption issues, it might be because the card can't handle the memory range that the drive thinks it can... -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."