From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756329Ab0FVVL6 (ORCPT ); Tue, 22 Jun 2010 17:11:58 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:49844 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753514Ab0FVVL4 (ORCPT ); Tue, 22 Jun 2010 17:11:56 -0400 Date: Tue, 22 Jun 2010 23:11:41 +0200 From: Ingo Molnar To: Peter Zijlstra Cc: Chris Mason , axboe@kernel.dk, linux-kernel@vger.kernel.org, Mike Galbraith , Oleg Nesterov , tglx Subject: Re: [PATCH RFC] reduce runqueue lock contention Message-ID: <20100622211141.GC21149@elte.hu> References: <20100520204810.GA19188@think> <1277114522.1875.469.camel@laptop> <1277117647.1875.503.camel@laptop> <1277125479.1875.510.camel@laptop> <1277213586.1875.704.camel@laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1277213586.1875.704.camel@laptop> User-Agent: Mutt/1.5.20 (2009-08-17) X-ELTE-SpamScore: -1.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.0 required=5.9 tests=BAYES_20 autolearn=no SpamAssassin version=3.2.5 -1.0 BAYES_20 BODY: Bayesian spam probability is 5 to 20% [score: 0.1004] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Peter Zijlstra wrote: > So this one boots and builds a kernel on a dual-socket nehalem. > > there's still quite a number of XXXs to fix, but I don't think any of the > races are crashing potential, mostly wrong accounting and scheduling iffies > like. > > But give it a go.. see what it does for you (x86 only for now). > > Ingo, any comments other than, eew, scary? :-) None, other than a question: which future kernel do you aim it for? I'd prefer v2.6.50 or later ;-) This is a truly scary patch. Ingo