From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759057AbZEMLOK (ORCPT ); Wed, 13 May 2009 07:14:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758164AbZEMLNz (ORCPT ); Wed, 13 May 2009 07:13:55 -0400 Received: from cantor2.suse.de ([195.135.220.15]:36224 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755539AbZEMLNz (ORCPT ); Wed, 13 May 2009 07:13:55 -0400 Message-ID: <4A0AAB6B.3090903@novell.com> Date: Wed, 13 May 2009 20:13:47 +0900 From: Tejun Heo User-Agent: Thunderbird 2.0.0.19 (X11/20081227) MIME-Version: 1.0 To: Andi Kleen Cc: Jan Beulich , Ingo Molnar , linux-kernel@vger.kernel.org Subject: Re: remap allocator for per-CPU memory References: <4A09B23B02000078000007F1@vpn.id2.novell.com> <4A09991E.9010903@kernel.org> <4A0A9C70.6090803@novell.com> <87vdo5l0u6.fsf@basil.nowhere.org> In-Reply-To: <87vdo5l0u6.fsf@basil.nowhere.org> X-Enigmail-Version: 0.95.7 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Andi Kleen wrote: > Tejun Heo writes: >> Okay, just glanced over the pageattr code. I don't think we need any >> special provisions for this as long as the TLB is fine with having >> overlapping PMD and PTE mappings with different attributes (please >> note that these two mappings aren't occupying the same linear >> addresses - they're aliases). This is allowed, right? > > Nope. Yeah, I'm going through the manual now and can't find anything which allows such behavior. I haven't been able to find anything which describes what happens between large page and 4k page aliases. Aieee... I'll dig through the manual a bit more and see whether this can be worked around somehow. :-( Thanks. -- tejun