Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751064AbVLLD3G (ORCPT ); Sun, 11 Dec 2005 22:29:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751070AbVLLD3F (ORCPT ); Sun, 11 Dec 2005 22:29:05 -0500 Received: from mail.suse.de ([195.135.220.2]:40863 "EHLO mx1.suse.de") by vger.kernel.org with ESMTP id S1751064AbVLLD3E (ORCPT ); Sun, 11 Dec 2005 22:29:04 -0500 Date: Mon, 12 Dec 2005 04:29:03 +0100 From: Andi Kleen To: Paul Jackson Cc: akpm@osdl.org, linux-kernel@vger.kernel.org, Nick Piggin , Simon Derr , Andi Kleen , Christoph Lameter Subject: Re: [PATCH] Cpuset: rcu optimization of page alloc hook Message-ID: <20051212032902.GW11190@wotan.suse.de> References: <20051211233130.18000.2748.sendpatchset@jackhammer.engr.sgi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20051211233130.18000.2748.sendpatchset@jackhammer.engr.sgi.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 706 Lines: 19 > Thanks to Andi Kleen and Nick Piggin for the suggestion. Thanks. But i guess it would be still a good idea to turn ia "check that there is no cpuset" test into an inline so that it can be done without a function call. Only when it fails call the out of line cpuset full checking function. This would make the common case of a kernel with cpuset compiled in but nobody using it faster. This could be done even without any memory barriers of any kind. -Andi - 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/