From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758187AbZEVXZT (ORCPT ); Fri, 22 May 2009 19:25:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757970AbZEVXZH (ORCPT ); Fri, 22 May 2009 19:25:07 -0400 Received: from mga03.intel.com ([143.182.124.21]:49197 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757944AbZEVXZG (ORCPT ); Fri, 22 May 2009 19:25:06 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.41,235,1241420400"; d="scan'208";a="146035748" Message-Id: <20090522231940.553094000@intel.com> User-Agent: quilt/0.46-1 Date: Fri, 22 May 2009 16:19:40 -0700 From: venkatesh.pallipadi@intel.com To: mingo@elte.hu, tglx@linutronix.de, hpa@zytor.com Cc: linux-kernel@vger.kernel.org, lenb@kernel.org, shaohua.li@intel.com, svaidy@linux.vnet.ibm.com, a.p.zijlstra@chello.nl, Venkatesh Pallipadi Subject: [patch 0/2] x86: Make offline cpus to go to deepest idle state using mwait Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org cpu hotplug has this long standing bug, with offline cpus going into hlt loop. That can result in offline CPU burning more power than while it is in online state (as when online it can potentially go to deeper C-state). Fix the bug using native mwait to enter deepest C-state in play_dead. --