From owner-svn-src-all@FreeBSD.ORG Thu Nov 12 11:40:06 2009 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E5FA1106566B; Thu, 12 Nov 2009 11:40:06 +0000 (UTC) (envelope-from bzeeb-lists@lists.zabbadoz.net) Received: from mail.cksoft.de (mail.cksoft.de [IPv6:2001:4068:10::3]) by mx1.freebsd.org (Postfix) with ESMTP id A160B8FC19; Thu, 12 Nov 2009 11:40:06 +0000 (UTC) Received: from localhost (amavis.fra.cksoft.de [192.168.74.71]) by mail.cksoft.de (Postfix) with ESMTP id CC31341C64C; Thu, 12 Nov 2009 12:40:05 +0100 (CET) X-Virus-Scanned: amavisd-new at cksoft.de Received: from mail.cksoft.de ([192.168.74.103]) by localhost (amavis.fra.cksoft.de [192.168.74.71]) (amavisd-new, port 10024) with ESMTP id 9L7IHvyYTh1R; Thu, 12 Nov 2009 12:40:05 +0100 (CET) Received: by mail.cksoft.de (Postfix, from userid 66) id 6CBB341C612; Thu, 12 Nov 2009 12:40:05 +0100 (CET) Received: from maildrop.int.zabbadoz.net (maildrop.int.zabbadoz.net [10.111.66.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.int.zabbadoz.net (Postfix) with ESMTP id 783134448E6; Thu, 12 Nov 2009 11:38:13 +0000 (UTC) Date: Thu, 12 Nov 2009 11:38:13 +0000 (UTC) From: "Bjoern A. Zeeb" X-X-Sender: bz@maildrop.int.zabbadoz.net To: Jun Kuriyama In-Reply-To: <200911090254.nA92sG1G005921@svn.freebsd.org> Message-ID: <20091112113708.I37440@maildrop.int.zabbadoz.net> References: <200911090254.nA92sG1G005921@svn.freebsd.org> X-OpenPGP-Key: 0x14003F198FEFA3E77207EE8D2B58B8F83CCF1842 MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r199067 - in head/sys: amd64/amd64 i386/i386 X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Nov 2009 11:40:07 -0000 On Mon, 9 Nov 2009, Jun Kuriyama wrote: Hi, > Author: kuriyama > Date: Mon Nov 9 02:54:16 2009 > New Revision: 199067 > URL: http://svn.freebsd.org/changeset/base/199067 > > Log: > - Add hw.clflush_disable loader tunable to avoid panic (trap 9) at > map_invalidate_cache_range() even if CPU is not Intel. > - This tunable can be set to -1 (default), 0 and 1. -1 is same as > current behavior, which automatically disable CLFLUSH on Intel CPUs > without CPUID_SS (should be occured on Xen only). You can specify 1 > when this panic happened on non-Intel CPUs (such as AMD's). Because > disabling CLFLUSH may reduce performance, you can try with setting 0 > on Intel CPUs without SS to use CLFLUSH feature. I wasn't able to boot dual Xeon machines anymore. svn merge -c -199067 $FBDSVN/head/sys sys fixed this problem. -- Bjoern A. Zeeb It will not break if you know what you are doing.