From owner-freebsd-ppc@FreeBSD.ORG Tue Apr 13 20:50:40 2010 Return-Path: Delivered-To: freebsd-ppc@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 11FF01065673; Tue, 13 Apr 2010 20:50:40 +0000 (UTC) (envelope-from toasty@dragondata.com) Received: from mail-pw0-f54.google.com (mail-pw0-f54.google.com [209.85.160.54]) by mx1.freebsd.org (Postfix) with ESMTP id DAAA18FC18; Tue, 13 Apr 2010 20:50:39 +0000 (UTC) Received: by pwi9 with SMTP id 9so6345310pwi.13 for ; Tue, 13 Apr 2010 13:50:39 -0700 (PDT) Received: by 10.142.196.17 with SMTP id t17mr2928983wff.280.1271191839124; Tue, 13 Apr 2010 13:50:39 -0700 (PDT) Received: from vpn177.ord02.your.org (vpn177.ord02.your.org [204.9.55.177]) by mx.google.com with ESMTPS id c21sm3256499ibr.10.2010.04.13.13.50.36 (version=TLSv1/SSLv3 cipher=RC4-MD5); Tue, 13 Apr 2010 13:50:37 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Apple Message framework v1078) From: Kevin Day In-Reply-To: <2FD96EE6-1761-4040-9E5A-58A33DE1D030@dragondata.com> Date: Tue, 13 Apr 2010 15:50:33 -0500 Content-Transfer-Encoding: quoted-printable Message-Id: <95CB057A-6A44-4C8F-B57D-CFC8D49F14C7@dragondata.com> References: <40B1BEB2-6620-4188-BB71-F8B5ED4AA234@dragondata.com> <4BB5EE68.2040504@freebsd.org> <7F22E2B9-34FB-4E3B-981E-8D2EF73A4F64@dragondata.com> <4BB7A9B2.3080901@freebsd.org> <4BBA2BD8.9050003@freebsd.org> <2FD96EE6-1761-4040-9E5A-58A33DE1D030@dragondata.com> To: Nathan Whitehorn , freebsd-ppc@freebsd.org X-Mailer: Apple Mail (2.1078) Cc: Subject: Re: Xserve G4 stability (random processes crashing) X-BeenThere: freebsd-ppc@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the PowerPC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Apr 2010 20:50:40 -0000 On Apr 5, 2010, at 7:57 PM, Kevin Day wrote: >=20 >=20 >=20 > Even pure NFS (running inside a jail with all of the jail chroot over = NFS) was still crashing. >=20 > But, I think I may have figured out the issue... >=20 > This box only has 1GB of DIMMs installed, but FreeBSD is somehow = seeing 1.25GB of RAM and is apparently trying to use it. If I put 2GB of = RAM in there, it correctly detects 2GB and (so far) buildworld is = running fine after three reboots. >=20 > Mac OS X is only seeing 1GB, and seems to reliably detect that. I'm = going to do some more digging to figure out where the wrong memory size = is coming from. >=20 >=20 Just to follow up... Everything is stable if I have all 4 DIMM sockets filled, no matter what = size DIMMs I use. If I have empty sockets, FreeBSD seems to be seeing = ghost memory that isn't there. OS X always sees the right amount. I = realize how little sense this makes, so I'm going to grab some more G4 = boxes that we haven't touched yet and make sure I can replicate this = there before blaming software. -- Kevin