Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754854AbZAHGiq (ORCPT ); Thu, 8 Jan 2009 01:38:46 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752029AbZAHGie (ORCPT ); Thu, 8 Jan 2009 01:38:34 -0500 Received: from one.firstfloor.org ([213.235.205.2]:45716 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751710AbZAHGid (ORCPT ); Thu, 8 Jan 2009 01:38:33 -0500 Date: Thu, 8 Jan 2009 07:52:35 +0100 From: Andi Kleen To: Steven Rostedt Cc: Linus Torvalds , Dave Kleikamp , Peter Zijlstra , paulmck@linux.vnet.ibm.com, Gregory Haskins , Ingo Molnar , Matthew Wilcox , Andi Kleen , Chris Mason , Andrew Morton , Linux Kernel Mailing List , linux-fsdevel , linux-btrfs , Thomas Gleixner , Nick Piggin , Peter Morreale , Sven Dietrich Subject: Re: [PATCH -v5][RFC]: mutex: implement adaptive spinning Message-ID: <20090108065235.GX496@one.firstfloor.org> References: <1231347442.11687.344.camel@twins> <1231365115.11687.361.camel@twins> <1231368870.6686.16.camel@norville.austin.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 668 Lines: 20 > What about memory hotplug as Ingo mentioned? > > Should that be: > > #if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_MEMORY_HOTPLUG) We expect memory hotunplug to only really work in movable zones (all others should at least have one kernel object somewhere that prevents unplug) and you can't have task structs in movable zones obviously So it's probably a non issue in practice. -Andi -- ak@linux.intel.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/