From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756053Ab0A1QWv (ORCPT ); Thu, 28 Jan 2010 11:22:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755962Ab0A1QWu (ORCPT ); Thu, 28 Jan 2010 11:22:50 -0500 Received: from one.firstfloor.org ([213.235.205.2]:50505 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755949Ab0A1QWu (ORCPT ); Thu, 28 Jan 2010 11:22:50 -0500 Date: Thu, 28 Jan 2010 17:22:48 +0100 From: Andi Kleen To: Dmitry Torokhov Cc: Andi Kleen , "linux-kernel@vger.kernel.org" Subject: Re: PNP PS/2 probing racy? Message-ID: <20100128162248.GF14636@basil.fritz.box> References: <20100128135405.GA28931@basil.fritz.box> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jan 28, 2010 at 07:57:47AM -0800, Dmitry Torokhov wrote: >> Hi, >> >> I noticed that on one test system of machine when booting the same >> kernel I get: >> >> PNP: No PS/2 controller found. Probing ports directly. >> serio: i8042 KBD port at 0x60,0x64 irq 1 >> serio: i8042 AUX port at 0x60,0x64 irq 12 >> >> and sometimes on another boot >> >> PNP: PS/2 Controller [PNP0303:PS2K,PNP0f03:PS2M] at 0x60,0x64 irq 1,12 >> >> Since I presume the BIOS does not change, is it possible the Linux >> procedure for this PNP probe is racy? I haven't checked the code so far. >> > > Are you using KVM with that box by any chance? Yes, it uses a KVM, but the console was always on it. -Andi -- ak@linux.intel.com -- Speaking for myself only.