From owner-svn-src-all@FreeBSD.ORG Mon Jan 13 14:23:48 2014 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: by hub.freebsd.org (Postfix, from userid 1033) id 03F73DF6; Mon, 13 Jan 2014 14:23:48 +0000 (UTC) Date: Mon, 13 Jan 2014 14:23:48 +0000 From: Alexey Dokuchaev To: Alexander Motin Subject: Re: svn commit: r260474 - stable/9/sys/x86/cpufreq Message-ID: <20140113142347.GA96299@FreeBSD.org> References: <201401091045.s09AjcFi083701@svn.freebsd.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <201401091045.s09AjcFi083701@svn.freebsd.org> User-Agent: Mutt/1.5.22 (2013-10-16) Cc: svn-src-stable@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, svn-src-stable-9@freebsd.org X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.17 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: Mon, 13 Jan 2014 14:23:48 -0000 On Thu, Jan 09, 2014 at 10:45:38AM +0000, Alexander Motin wrote: > New Revision: 260474 > URL: http://svnweb.freebsd.org/changeset/base/260474 > > Log: > MFC r259197: > Do not DELAY() for P-state transition unless we want to see the result. > > Intel manual says: "If a transition is already in progress, transition to > a new value will subsequently take effect. Reads of IA32_PERF_CTL determine > the last targeted operating point." So seems it should be fine to just > trigger wanted transition and go. Linux does the same. > > Modified: > stable/9/sys/x86/cpufreq/est.c It looks like stable/8 can also benefit from this commit. Mind making one? ./danfe