From owner-freebsd-amd64@FreeBSD.ORG Mon Nov 29 21:53:22 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 BEA5316A4CE for ; Mon, 29 Nov 2004 21:53:22 +0000 (GMT) Received: from troutmask.apl.washington.edu (troutmask.apl.washington.edu [128.208.78.105]) by mx1.FreeBSD.org (Postfix) with ESMTP id 960A843D58 for ; Mon, 29 Nov 2004 21:53:22 +0000 (GMT) (envelope-from sgk@troutmask.apl.washington.edu) Received: from troutmask.apl.washington.edu (localhost [127.0.0.1]) iATLrM2N026892; Mon, 29 Nov 2004 13:53:22 -0800 (PST) (envelope-from sgk@troutmask.apl.washington.edu) Received: (from sgk@localhost)iATLrMqs026891; Mon, 29 Nov 2004 13:53:22 -0800 (PST) (envelope-from sgk) Date: Mon, 29 Nov 2004 13:53:22 -0800 From: Steve Kargl To: "James R. Van Artsalen" Message-ID: <20041129215322.GA26806@troutmask.apl.washington.edu> References: <20041129211341.GA26548@troutmask.apl.washington.edu> <41AB9795.7020805@jrv.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <41AB9795.7020805@jrv.org> User-Agent: Mutt/1.4.1i cc: freebsd-amd64@freebsd.org Subject: Re: kernel panic with greater that 8 GB of memory X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Nov 2004 21:53:22 -0000 On Mon, Nov 29, 2004 at 03:41:41PM -0600, James R. Van Artsalen wrote: > I'm not convinced that the bounce-buffer scheme works on amd64 at all. > I don't think twe, ata or bge work (individually or in combination) with > more than 4GB of RAM. 8GB of RAM seems to work without a problem. > Are you using a bge NIC or USB, or any other driver that needs bounce > buffer, 1394? Which SCSI driver? The K8S Pro has 2 bge nics on the motherboard. I have the driver in the kernel, but neither nic is currently being used. USB is compiled into the kernel and is only used when I transfer files to a memory stick (ie., it's seldomly used). Two SCSI drives are attached to an Adaptec AIC7902 Ultra320 SCSI adapter that is also on the motherboard. > Is this 5.3 release? 5.2.1 worked for me. The bounce-buffer code in > amd64 has changed since then but I haven't been able to figure it out. 6.0-CURRENT from today's sources, but the problem goes back to at least August. You can find other posts by me about panics with >8GB or ram. -- Steve