From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756948AbYACKuW (ORCPT ); Thu, 3 Jan 2008 05:50:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752154AbYACKuK (ORCPT ); Thu, 3 Jan 2008 05:50:10 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:49899 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752151AbYACKuJ (ORCPT ); Thu, 3 Jan 2008 05:50:09 -0500 Date: Thu, 3 Jan 2008 11:49:56 +0100 From: Ingo Molnar To: Andi Kleen Cc: linux-kernel@vger.kernel.org, Thomas Gleixner , "H. Peter Anvin" Subject: Re: [PATCH] [12/20] x86: Use a per cpu timer for correctable machine check checking Message-ID: <20080103104956.GE29194@elte.hu> References: <20080103149.088038000@suse.de> <20080103005007.CE13A14D40@wotan.suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080103005007.CE13A14D40@wotan.suse.de> User-Agent: Mutt/1.5.17 (2007-11-01) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0001] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Andi Kleen wrote: > Previously the code used a single timer that then used > smp_call_function to interrupt all CPUs while the original CPU was > waiting for them. > > But it is better / more real time and more power friendly to simply > run individual timers on each CPU so they all do this independently. > > This way no single CPU has to wait for all others. i think we should unify this code first and provide it on 32-bit as well. Ingo