From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932848AbXB1ObU (ORCPT ); Wed, 28 Feb 2007 09:31:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932864AbXB1ObU (ORCPT ); Wed, 28 Feb 2007 09:31:20 -0500 Received: from public.id2-vpn.continvity.gns.novell.com ([195.33.99.129]:46504 "EHLO public.id2-vpn.continvity.gns.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932848AbXB1ObT (ORCPT ); Wed, 28 Feb 2007 09:31:19 -0500 Message-Id: <45E5A05F.76E4.0078.0@novell.com> X-Mailer: Novell GroupWise Internet Agent 7.0.1 Date: Wed, 28 Feb 2007 14:31:43 +0000 From: "Jan Beulich" To: "Andrew Morton" , "Hugh Dickins" Cc: Subject: struct page field arrangement Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org A change early last year reordered struct page so that ptl overlaps not only private, but also mapping. Since spinlock_t can be much larger, I'm wondering whether there's a reason to not also overlay the space index and lru take - are these used for anything on page table pages? Thanks, Jan