From owner-freebsd-acpi@FreeBSD.ORG Tue Jun 5 13:21:17 2007 Return-Path: X-Original-To: freebsd-acpi@freebsd.org Delivered-To: freebsd-acpi@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 1F11016A474 for ; Tue, 5 Jun 2007 13:21:17 +0000 (UTC) (envelope-from pho@holm.cc) Received: from relay02.pair.com (relay02.pair.com [209.68.5.16]) by mx1.freebsd.org (Postfix) with SMTP id C2FFF13C4C5 for ; Tue, 5 Jun 2007 13:21:16 +0000 (UTC) (envelope-from pho@holm.cc) Received: (qmail 52947 invoked from network); 5 Jun 2007 13:21:15 -0000 Received: from 83.95.197.164 (HELO peter.osted.lan) (83.95.197.164) by relay02.pair.com with SMTP; 5 Jun 2007 13:21:15 -0000 X-pair-Authenticated: 83.95.197.164 Received: from peter.osted.lan (localhost.osted.lan [127.0.0.1]) by peter.osted.lan (8.13.6/8.13.6) with ESMTP id l55DLEkn015389; Tue, 5 Jun 2007 15:21:14 +0200 (CEST) (envelope-from pho@peter.osted.lan) Received: (from pho@localhost) by peter.osted.lan (8.13.6/8.13.6/Submit) id l55DLDqR015388; Tue, 5 Jun 2007 15:21:13 +0200 (CEST) (envelope-from pho) Date: Tue, 5 Jun 2007 15:21:13 +0200 From: Peter Holm To: Nate Lawson Message-ID: <20070605132113.GA14976@peter.osted.lan> References: <20070604183419.GA73268@peter.osted.lan> <46646BD3.5080900@root.org> <20070605043758.GA99622@peter.osted.lan> <46652286.2040006@root.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <46652286.2040006@root.org> User-Agent: Mutt/1.4.2.1i Cc: freebsd-acpi@freebsd.org Subject: Re: Possible ACPI relared panic with Tyan S2720 X-BeenThere: freebsd-acpi@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: ACPI and power management development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 05 Jun 2007 13:21:17 -0000 On Tue, Jun 05, 2007 at 01:44:54AM -0700, Nate Lawson wrote: > Peter Holm wrote: > > On Mon, Jun 04, 2007 at 12:45:23PM -0700, Nate Lawson wrote: > >> This is a really confusing issue. All the trace you have shows is that > >> it occurs while transitioning the system from legacy to ACPI mode. > >> Unfortunately, the details of what is going on are hidden in the BIOS > >> since that write to a port triggers an SMI and the BIOS does the rest. > >> > >> However, it seems like the BIOS is reserving more memory, using memory > >> it didn't reserve, or FreeBSD is using memory we shouldn't. John, any > >> insight on the SMAP output? > >> > >>> SMAP type=01 base=0000000000000000 len=000000000009fc00 > >>> SMAP type=02 base=000000000009fc00 len=0000000000000400 > >>> SMAP type=02 base=00000000000e0000 len=0000000000020000 > >>> SMAP type=01 base=0000000000100000 len=000000003fef0000 > >>> SMAP type=03 base=000000003fff0000 len=000000000000f000 > >>> SMAP type=04 base=000000003ffff000 len=0000000000001000 > >>> SMAP type=02 base=00000000fec00000 len=0000000000100000 > >>> SMAP type=02 base=00000000fee00000 len=0000000000001000 > >>> SMAP type=02 base=00000000fff80000 len=0000000000080000 > >> Peter, can you figure out what phys address is getting overwritten? > >> Seems like it's the loader that sets up the module list and the loader's > >> allocator may be using RAM it shouldn't. > >> > > > > If I did it right (I used a vtophys() on the address): > > > > Address of mod->name(if_tun): 0xc3eed5ec, phys: 0x985ec > > So it's somewhere near 620K and the first region goes to 640K - 1 K. > The last 1 K is type 2 (reserved). Nothing seems to show why switching > to acpi mode results in an overwrite of data at 620K. I'm not sure > where to look. > > There should be some way to write a guard pattern to that area but I'll > have to think about it a bit first. Can you see if a BIOS update is > available and try it out? What about seeing if you can pre-alloc (by > hacking loader's SMAP code to reserve more of the first 640 K) and > writing a pattern there, then verifying it at various points during boot > to be sure we know exactly where the BIOS is writing? > I'm somewhat hesitant to update the BIOS on my one and only SMP test box. The BIOS is date 7/10/02, so it *is* old, but has served as a stress test box since August 2005. -- Peter