Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754485AbZFEH1u (ORCPT ); Fri, 5 Jun 2009 03:27:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752509AbZFEH1m (ORCPT ); Fri, 5 Jun 2009 03:27:42 -0400 Received: from mx-out.daemonmail.net ([216.104.160.38]:55319 "EHLO mx-out.daemonmail.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752361AbZFEH1m (ORCPT ); Fri, 5 Jun 2009 03:27:42 -0400 From: "Michael S. Zick" Reply-To: lkml@morethan.org To: Harald Welte Subject: Re: Linux 2.6.30-rc8 [also: VIA Support] Date: Fri, 5 Jun 2009 02:27:40 -0500 User-Agent: KMail/1.9.9 Cc: Linus Torvalds , Duane Griffin , Linux Kernel Mailing List References: <20090605071902.GD6411@prithivi.gnumonks.org> In-Reply-To: <20090605071902.GD6411@prithivi.gnumonks.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200906050227.42295.lkml@morethan.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1338 Lines: 36 On Fri June 5 2009, Harald Welte wrote: > On Thu, Jun 04, 2009 at 10:07:37AM -0700, Linus Torvalds wrote: > > > > > > Side note: is it more stable if you disable the VIA speedstep thing > > (whatever it's called (ok, google tells me it's called "TwinTurbo" and > > "Advanced PowerSaver")? > > > > Features like that easily put a huge stress on power regulators etc, if > > they result in sudden changes in current draw. Underspecced capacitors > > etc can cause CPU "brown-outs", which in turn can easily cause total > > failure. > > I agree, that might be an interesting test. > > As a side note: The C7-M actually uses the same software interface as Intel CPU > for doing the power transitions (ACPI Performance States). Only very early C7 > models used the cpufreq/e_powersaver.c driver. > What is "very early C7 models" in terms of cpuid results? If you can get permission to reveal those field details - we can test for that (this build reports "stepping 0" but I don't trust the report). Mike > So if you want to disable it, make sure you disable X86_ACPI_CPUFREQ. > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/