From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760086AbZJNVGg (ORCPT ); Wed, 14 Oct 2009 17:06:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759118AbZJNVGg (ORCPT ); Wed, 14 Oct 2009 17:06:36 -0400 Received: from rhlx01.hs-esslingen.de ([129.143.116.10]:59574 "EHLO rhlx01.hs-esslingen.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753638AbZJNVGf (ORCPT ); Wed, 14 Oct 2009 17:06:35 -0400 Date: Wed, 14 Oct 2009 23:05:58 +0200 From: Andreas Mohr To: Justin Piszcz Cc: linux-kernel@vger.kernel.org Subject: Re: System (motherboard/CPU?) emits high pitch noise when processor.ko is loaded. Message-ID: <20091014210558.GA15555@rhlx01.hs-esslingen.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Priority: none 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 And that's news exactly how? ;) Systems and their switching regulators (and especially their backing coils) have been making noise for more than half a decade now, depending on which activities frequency is currently taking place on the system. OTOH this means that in your case, maybe some interval in the processor module (or somewhere related) is ill-chosen (leading to significant, audible differences between busy/idle state) and should be changed. For example, with HZ settings 100 can cause quite a bit of noise on some machines, whereas 1000 is better, IIRC. And that could be similar for some processing in this module. Andreas