From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932080AbWHBQOW (ORCPT ); Wed, 2 Aug 2006 12:14:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932082AbWHBQOW (ORCPT ); Wed, 2 Aug 2006 12:14:22 -0400 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:42387 "EHLO lxorguk.ukuu.org.uk") by vger.kernel.org with ESMTP id S932080AbWHBQOV (ORCPT ); Wed, 2 Aug 2006 12:14:21 -0400 Subject: Re: Re : sparsemem usage From: Alan Cox To: moreau francis Cc: linux-kernel@vger.kernel.org, apw@shadowen.org In-Reply-To: <20060802153316.7813.qmail@web25813.mail.ukl.yahoo.com> References: <20060802153316.7813.qmail@web25813.mail.ukl.yahoo.com> Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: Wed, 02 Aug 2006 17:33:42 +0100 Message-Id: <1154536422.23655.25.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.6.2 (2.6.2-1.fc5.5) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Ar Mer, 2006-08-02 am 15:33 +0000, ysgrifennodd moreau francis: > > sections but nothing stops you marking most of the 2Mb section except > > the 128K that exists as "in use" > > ok. But it will make pfn_valid() return "valid" for page beyond the first 128 KB. > Won't that result in bad impacts later ? Mapping out parts of a section is quite normal - think about the 640K to 1Mb hole in PC memory space. Alan