From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1765006AbZE1Uuh (ORCPT ); Thu, 28 May 2009 16:50:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1764961AbZE1UuP (ORCPT ); Thu, 28 May 2009 16:50:15 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:50597 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1764901AbZE1UuN (ORCPT ); Thu, 28 May 2009 16:50:13 -0400 Date: Thu, 28 May 2009 22:50:09 +0200 From: Pavel Machek To: "Michael S. Zick" Cc: "H. Peter Anvin" , Ingo Molnar , Thomas Gleixner , linux-kernel@vger.kernel.org Subject: Re: [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic Message-ID: <20090528205008.GF11477@elf.ucw.cz> References: <200905221139.26941.lkml@morethan.org> <200905221721.08495.lkml@morethan.org> <20090528124853.GC1421@ucw.cz> <200905280829.15672.lkml@morethan.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200905280829.15672.lkml@morethan.org> X-Warning: Reading this can be dangerous to your mental health. 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 On Thu 2009-05-28 08:29:13, Michael S. Zick wrote: > On Thu May 28 2009, Pavel Machek wrote: > > Hi! > > > > > The observation that executing an unnecessary 'lock' opcode in some > > > cases slows down the machine is not felt by myself to be significant > > > to duplicating my observations. Note: I have been wrong before. > > > > > > This is as informative as I can make the message. > > > > > > PS: *not* a single machine failure, tested on five machines, owned > > > by four different people, two brands, with different use histories. > > > > I have seen some problems on via c7m based machines, where some 'smart > > bios person' implemented EC access in AML (normally, it is accessed > > from ec.c driver). Maybe you have similary bad bios? > > > > How to tell or distingush? > Did your looking at the dmidecode output show you that? Disassemble DSDT, and if you see strange code duplicating kernel's ec.c driver, you have similar problem... Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html