From owner-svn-src-all@FreeBSD.ORG Thu May 20 21:14:48 2010 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 448ED106564A; Thu, 20 May 2010 21:14:48 +0000 (UTC) (envelope-from nwhitehorn@freebsd.org) Received: from argol.doit.wisc.edu (argol.doit.wisc.edu [144.92.197.212]) by mx1.freebsd.org (Postfix) with ESMTP id 0D3D58FC17; Thu, 20 May 2010 21:14:47 +0000 (UTC) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; CHARSET=US-ASCII; format=flowed Received: from avs-daemon.smtpauth3.wiscmail.wisc.edu by smtpauth3.wiscmail.wisc.edu (Sun Java(tm) System Messaging Server 7u2-7.05 32bit (built Jul 30 2009)) id <0L2Q00F12LO06K00@smtpauth3.wiscmail.wisc.edu>; Thu, 20 May 2010 16:14:24 -0500 (CDT) Received: from comporellon.tachypleus.net ([unknown] [76.210.60.242]) by smtpauth3.wiscmail.wisc.edu (Sun Java(tm) System Messaging Server 7u2-7.05 32bit (built Jul 30 2009)) with ESMTPSA id <0L2Q00CMNLNQOE30@smtpauth3.wiscmail.wisc.edu>; Thu, 20 May 2010 16:14:15 -0500 (CDT) Date: Thu, 20 May 2010 16:14:13 -0500 From: Nathan Whitehorn In-reply-to: <201005202107.o4KL7wtH009945@svn.freebsd.org> To: Nathan Whitehorn Message-id: <4BF5A625.8020209@freebsd.org> X-Spam-Report: AuthenticatedSender=yes, SenderIP=76.210.60.242 X-Spam-PmxInfo: Server=avs-11, Version=5.5.9.395186, Antispam-Engine: 2.7.2.376379, Antispam-Data: 2010.5.20.210315, SenderIP=76.210.60.242 References: <201005202107.o4KL7wtH009945@svn.freebsd.org> User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US; rv:1.9.1.9) Gecko/20100407 Thunderbird/3.0.4 Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r208364 - head/sys/powerpc/aim 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, 20 May 2010 21:14:48 -0000 On 05/20/10 16:07, Nathan Whitehorn wrote: > Author: nwhitehorn > Date: Thu May 20 21:07:58 2010 > New Revision: 208364 > URL: http://svn.freebsd.org/changeset/base/208364 > > Log: > Fix a long-standing bug in the PowerPC OFW call function on SMP machines > where running ofwdump could cause hangs by forcing all secondary CPUs > into a busy wait with interrupts off during the call. > In retrospect, this was poorly phrased. A non-ambiguous version: By forcing all secondary CPUs into a busy wait with interrupts off during Open Firmware calls, fix a long-standing bug in the PowerPC OFW call function on SMP machines where running ofwdump could cause the machine to hang. -Nathan