From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757826Ab1E3VgQ (ORCPT ); Mon, 30 May 2011 17:36:16 -0400 Received: from casper.infradead.org ([85.118.1.10]:45857 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751986Ab1E3VgO convert rfc822-to-8bit (ORCPT ); Mon, 30 May 2011 17:36:14 -0400 Subject: Re: Very high CPU load when idle with 3.0-rc1 From: Peter Zijlstra To: paulmck@linux.vnet.ibm.com Cc: Damien Wyart , Ingo Molnar , Mike Galbraith , linux-kernel@vger.kernel.org In-Reply-To: <20110530212955.GT2668@linux.vnet.ibm.com> References: <20110530055924.GA9169@brouette> <1306755291.1200.2872.camel@twins> <20110530162354.GQ2668@linux.vnet.ibm.com> <1306773981.23844.2.camel@twins> <20110530212955.GT2668@linux.vnet.ibm.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Date: Mon, 30 May 2011 23:35:28 +0200 Message-ID: <1306791328.23844.13.camel@twins> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2011-05-30 at 14:29 -0700, Paul E. McKenney wrote: > But I should be able to move them back in under "if (cpu_online(cpu))", > right? Yeah, you should be able to put the wakeup in the spawn function when made conditional on cpu_online(), although I'm not quite sure how to do that for the rnp case, but I guess you'll have a better grasp on that.