From owner-freebsd-current@FreeBSD.ORG Mon Oct 18 22:47:45 2010 Return-Path: Delivered-To: current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 50DB21065693 for ; Mon, 18 Oct 2010 22:47:45 +0000 (UTC) (envelope-from volker@vwsoft.com) Received: from Mail.elbekies.net (mail.elbekies.net [217.6.211.146]) by mx1.freebsd.org (Postfix) with ESMTP id B66BA8FC1B for ; Mon, 18 Oct 2010 22:47:44 +0000 (UTC) Received: from bel.soho.vwsoft.com (p57A0CBAA.dip.t-dialin.net [87.160.203.170]) by Mail.elbekies.net (Postfix) with ESMTPA id 0D7EF2E037 for ; Tue, 19 Oct 2010 00:31:35 +0200 (CEST) Received: from [192.168.16.4] (dardanos.sz.vwsoft.com [192.168.16.4]) by bel.soho.vwsoft.com (Postfix) with ESMTP id A084733C7F; Tue, 19 Oct 2010 00:31:20 +0200 (CEST) Message-ID: <4CBCCAB8.4090500@vwsoft.com> Date: Tue, 19 Oct 2010 00:31:20 +0200 From: volker@vwsoft.com User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.9.1.12) Gecko/20101007 Thunderbird/3.0.8 MIME-Version: 1.0 To: FreeBSD current Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-VWSoft-MailScanner: Found to be clean X-MailScanner-ID: 0D7EF2E037.AAF6E X-Elbekies-MailScanner: Found to be clean X-MailScanner-From: volker@vwsoft.com MailScanner-NULL-Check: 1288045900.79597@MvX6DweFtewBkI3lqtTzdQ Cc: Andriy Gapon Subject: c 213323 breaks Sony Vaio P11Z w/o acpi X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 18 Oct 2010 22:47:45 -0000 Hi Andriy & list! Since rev 213323 my Sony Vaio P11Z was unable to boot up. It broke with a divide by zero in topo_probe_0x4 at line 289 as cpu_logical is 0. The cpu is an Intel Atom Z520 (single core). System doesn't boot at all w/ acpi enabled. The following patch made me to boot up again. Index: i386/i386/mp_machdep.c =================================================================== --- i386/i386/mp_machdep.c (revision 213936) +++ i386/i386/mp_machdep.c (working copy) @@ -286,7 +286,7 @@ cpu_logical++; } - cpu_cores /= cpu_logical; + cpu_cores /= cpu_logical==0?1:cpu_logical; hyperthreading_cpus = cpu_logical; } ``mptable -grope -verbose`` gives: =============================================================================== MPTable looking for EBDA pointer @ 0x040e, found, searching EBDA @ 0x0009fc00 searching CMOS 'top of mem' @ 0x0009f800 (638K) searching default 'top of mem' @ 0x0009fc00 (639K) searching BIOS @ 0x000f0000 searching extended BIOS @ 0x000e0000 groping memory @ 0x00080000 groping memory @ 0x00090000 MP FPS NOT found, suggest trying -grope option!!! so it's not of much help. relevant part of dmesg looks like: FreeBSD 9.0-CURRENT #3 r213904:213936M: Sat Oct 16 22:50:53 UTC 2010 root@juno.sz.vwsoft.com:/usr/obj/usr/src/sys/JUNO i386 CPU: Intel(R) Atom(TM) CPU Z520 @ 1.33GHz (1333.31-MHz 686-class CPU) Origin = "GenuineIntel" Id = 0x106c2 Family = 6 Model = 1c Stepping = 2 Features=0xbfe9fbff Features2=0x40c3bd AMD Features=0x100000 AMD Features2=0x1 TSC: P-state invariant real memory = 2147483648 (2048 MB) avail memory = 2081042432 (1984 MB) I'm wondering if there's a better way to fix that problem or if someone wants to commit my fix. Thanks, Volker