Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754667AbXFORa3 (ORCPT ); Fri, 15 Jun 2007 13:30:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751443AbXFORaV (ORCPT ); Fri, 15 Jun 2007 13:30:21 -0400 Received: from wa-out-1112.google.com ([209.85.146.183]:27297 "EHLO wa-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751367AbXFORaU convert rfc822-to-8bit (ORCPT ); Fri, 15 Jun 2007 13:30:20 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=bTUbWlW+RxTF/vfQ1QNw6MVDGyc6x69C0qN+LBgqhfH76GaMSmaQewA9iqZE9pU/Hoj8Qy18FUosZfJNi+pzMO3zwuijdMfzTwvl5JiPt4zTzK2FUCGC66h3GAqS6I57HPcsemw4Qm7xIBQC6rVI4o7kcli8pvx0Fk76f1pB6gs= Message-ID: <6934efce0706151030v3357afe6q8073c59610f3b924@mail.gmail.com> Date: Fri, 15 Jun 2007 10:30:19 -0700 From: "Jared Hulbert" To: "Heiko Carstens" Subject: Re: [PATCH 2.6.21] cramfs: add cramfs Linear XIP Cc: carsteno@de.ibm.com, "Nick Piggin" , "Andrew Morton" , richard.griffiths@windriver.com, "Richard Griffiths" , linux-kernel@vger.kernel.org, "=?ISO-8859-1?Q?J=F6rn_Engel?=" , "Heiko Carstens" In-Reply-To: <20070615114913.GA30414@osiris.boeblingen.de.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8BIT Content-Disposition: inline References: <20070522154905.1d7e8a2e.akpm@linux-foundation.org> <465BB5BA.3050900@yahoo.com.au> <6934efce0706011748p46cf7995vdca0b9cc3f0b06a3@mail.gmail.com> <46612D6F.6000002@yahoo.com.au> <46641472.3080802@de.ibm.com> <6934efce0706121711m738bd9abqa02350ccc7eabf9f@mail.gmail.com> <4671495A.3020605@de.ibm.com> <6934efce0706140953x2167944fr54eca6376e1f8d63@mail.gmail.com> <46725A4D.1040404@de.ibm.com> <20070615114913.GA30414@osiris.boeblingen.de.ibm.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 918 Lines: 19 > If you can write code that doesn't need any struct pages that would make > life a bit easier, since we wouldn't need any pseudo memory hotplug code > that just adds struct pages. That was my gut feel too. However, it seems from Carsten and J?rn discussion of read/write XIP on Flash (and some new Phase Change) memories that having the struct pages has a lot of potential benefits. Wouldn't it also allow most of the mm routines to remain unchanged. I just worry that it would be difficult to set apart these non volitatile pages that can't be written too directly. > We would still need to add the kernel mapping though. But that's handled by ioremap()ing it right? - 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/