Date: Thu, 20 May 2010 16:14:13 -0500 From: Nathan Whitehorn <nwhitehorn@freebsd.org> To: Nathan Whitehorn <nwhitehorn@FreeBSD.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r208364 - head/sys/powerpc/aim Message-ID: <4BF5A625.8020209@freebsd.org> In-Reply-To: <201005202107.o4KL7wtH009945@svn.freebsd.org> References: <201005202107.o4KL7wtH009945@svn.freebsd.org>
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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
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