Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030178AbWAXBAk (ORCPT ); Mon, 23 Jan 2006 20:00:40 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030188AbWAXBAk (ORCPT ); Mon, 23 Jan 2006 20:00:40 -0500 Received: from ms-smtp-02.texas.rr.com ([24.93.47.41]:42719 "EHLO ms-smtp-02-eri0.texas.rr.com") by vger.kernel.org with ESMTP id S1030178AbWAXBAj (ORCPT ); Mon, 23 Jan 2006 20:00:39 -0500 Date: Mon, 23 Jan 2006 19:00:03 -0600 From: Dave McCracken To: Ray Bryant , Andi Kleen cc: Robin Holt , Hugh Dickins , Linux Kernel , Linux Memory Management Subject: Re: [PATCH/RFC] Shared page tables Message-ID: In-Reply-To: <200601231853.54948.raybry@mpdtxmail.amd.com> References: <200601231816.38942.raybry@mpdtxmail.amd.com> <200601240139.46751.ak@suse.de> <200601231853.54948.raybry@mpdtxmail.amd.com> X-Mailer: Mulberry/4.0.0b4 (Linux/x86) 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 Content-Length: 841 Lines: 21 --On Monday, January 23, 2006 18:53:54 -0600 Ray Bryant wrote: > Isn't it the case that if the region is large enough (say >> 2MB), that > randomized mmaps will just cause the first partial page of pte's to not > be shareable, and as soon as we have a full pte page mapped into the > file that the full pte pages will be shareable, etc, until the last > (partial) pte page is not shareable? Yes, but only if the 2MB alignment is the same. And with the current version of my patch the region has to be mapped at the same address in both processes. Sorry. Dave - 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/