From owner-freebsd-alpha Fri Sep 27 13:41:21 2002 Delivered-To: freebsd-alpha@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D804537B401 for ; Fri, 27 Sep 2002 13:41:20 -0700 (PDT) Received: from mukappabeta.net (moghedien.mukappabeta.net [194.145.150.66]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6534743E6E for ; Fri, 27 Sep 2002 13:41:20 -0700 (PDT) (envelope-from mkb@mukappabeta.de) Received: by mukappabeta.net (Postfix, from userid 1000) id 088153440B; Fri, 27 Sep 2002 22:41:12 +0200 (CEST) Date: Fri, 27 Sep 2002 22:41:10 +0200 From: Matthias Buelow To: Andrew Gallatin Cc: freebsd-alpha@FreeBSD.ORG Subject: Re: 4.7RC on PWS 600AU: machine check panic on boot Message-ID: <20020927204109.GA23930@moghedien.mukappabeta.net> References: <20020927200359.GC23842@moghedien.mukappabeta.net> <15764.48819.545378.165995@grasshopper.cs.duke.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <15764.48819.545378.165995@grasshopper.cs.duke.edu> User-Agent: Mutt/1.4i Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Andrew Gallatin writes: >You can't use > 1GB of RAM on a PWS. I don't think the busdma code is >currently smart enough to use s/g dma for buffers outside the >direct-map window (1GB on PWS). The failure mode is rather strange, >but not all that surprising if an errant DMA scribbled over some >kernel data. *sigh*, ok, NetBSD allegedly does support scatter-gather DMA for >1GB, so I'll rather try and get the bug fixed there which causes SCSI errors after some disk usage... I want to use the machine with the installed 1.5G RAM, naturally. However, the problem with FreeBSD is not some odd crash somewhere, but a machine check always at the same place at boot. Don't know if that's related to the situation you describe. >Not what you wanted to hear, probably. Yeah, you can't always get what you want. :) -- Matthias Buelow, de.mukappabeta@mkb To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message