From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161065AbXCGApO (ORCPT ); Tue, 6 Mar 2007 19:45:14 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161068AbXCGApO (ORCPT ); Tue, 6 Mar 2007 19:45:14 -0500 Received: from terminus.zytor.com ([192.83.249.54]:53546 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161062AbXCGApM (ORCPT ); Tue, 6 Mar 2007 19:45:12 -0500 Message-ID: <45EE0AF7.70502@zytor.com> Date: Tue, 06 Mar 2007 16:44:39 -0800 From: "H. Peter Anvin" User-Agent: Thunderbird 1.5.0.9 (X11/20070212) MIME-Version: 1.0 To: Rusty Russell CC: Ingo Molnar , lkml - Kernel Mailing List , Zachary Amsden , Jeremy Fitzhardinge , Andrew Morton , Andi Kleen Subject: Re: [PATCH 6/8] Allow per-cpu variables to be page-aligned References: <1173184747.4644.23.camel@localhost.localdomain> <1173185592.4644.28.camel@localhost.localdomain> <1173185666.4644.30.camel@localhost.localdomain> <1173185734.4644.32.camel@localhost.localdomain> <1173185827.4644.34.camel@localhost.localdomain> <1173185909.4644.36.camel@localhost.localdomain> <1173186021.4644.38.camel@localhost.localdomain> <20070306131522.GC9031@elte.hu> <1173226608.4644.59.camel@localhost.localdomain> In-Reply-To: <1173226608.4644.59.camel@localhost.localdomain> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Rusty Russell wrote: > > AFAICT, we could save the wasted partial page in three ways: by trying > to link it first, if it's only a case of one file, by having a special > page-aligned percpu data section, or by having a smarter linker. > We already do the second of those for conventional data, so it would make sense for percpu as well. Smarter linker would be better, but ugh, I don't see that happening any time soon. -hpa