From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933002Ab1BYWeD (ORCPT ); Fri, 25 Feb 2011 17:34:03 -0500 Received: from adelie.canonical.com ([91.189.90.139]:51335 "EHLO adelie.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932105Ab1BYWeB (ORCPT ); Fri, 25 Feb 2011 17:34:01 -0500 Date: Fri, 25 Feb 2011 16:33:57 -0600 From: Seth Forshee To: Thomas Gleixner Cc: Steven Rostedt , Linux Kernel Mailing List , Ingo Molnar Subject: Re: Performance/resume issues on Toshiba NB305 Message-ID: <20110225223357.GE24686@thinkpad-t410> Mail-Followup-To: Thomas Gleixner , Steven Rostedt , Linux Kernel Mailing List , Ingo Molnar References: <20110225164239.GA24686@thinkpad-t410> <20110225201747.GB23161@home.goodmis.org> <20110225202748.GB24686@thinkpad-t410> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Feb 25, 2011 at 11:11:31PM +0100, Thomas Gleixner wrote: > On Fri, 25 Feb 2011, Seth Forshee wrote: > > On Fri, Feb 25, 2011 at 03:17:47PM -0500, Steven Rostedt wrote: > > > > One possible explanation here is that the performance problems are also > > > > related to hangs in SMI handlers until there's a timer interrupt, > > > > although I don't know how that explains why some of the command line > > > > options eliminate the performance issues. > > > > > > Sounds like a buggy BIOS to me. Is there upgrades available for this > > > box? > > > > It does sound like a buggy BIOS. I've already flashed the latest BIOS > > though, so no luck there. > > Has the BIOS some knob to disable that feature^Wcrap? It's often > hidden behind some "$manufacturer super extra mode". You mean the "hang in SMI until a timer interrupt fires" feature? ;) There's nothing in the BIOS settings that looks relevant to either of the topics at hand.