Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755353AbZFEHUR (ORCPT ); Fri, 5 Jun 2009 03:20:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752461AbZFEHUH (ORCPT ); Fri, 5 Jun 2009 03:20:07 -0400 Received: from ganesha.gnumonks.org ([213.95.27.120]:49587 "EHLO ganesha.gnumonks.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751640AbZFEHUG (ORCPT ); Fri, 5 Jun 2009 03:20:06 -0400 Date: Fri, 5 Jun 2009 09:19:02 +0200 From: Harald Welte To: Linus Torvalds Cc: "Michael S. Zick" , Duane Griffin , Linux Kernel Mailing List Subject: Re: Linux 2.6.30-rc8 [also: VIA Support] Message-ID: <20090605071902.GD6411@prithivi.gnumonks.org> References: <200906041121.30845.lkml@morethan.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1240 Lines: 29 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. So if you want to disable it, make sure you disable X86_ACPI_CPUFREQ. -- - Harald Welte http://linux.via.com.tw/ ============================================================================ VIA Free and Open Source Software Liaison -- 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/