From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jamie Lokier Subject: Re: [PATCH 00/10] AXFS: Advanced XIP filesystem Date: Thu, 21 Aug 2008 12:07:50 +0100 Message-ID: <20080821110749.GA1926@shareable.org> References: <48AD00C4.6060302@gmail.com> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <48AD00C4.6060302@gmail.com> Sender: linux-embedded-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Jared Hulbert Cc: Linux-kernel@vger.kernel.org, linux-embedded@vger.kernel.org, linux-mtd , =?iso-8859-1?Q?J=F6rn?= Engel , tim.bird@AM.SONY.COM, cotte@de.ibm.com, nickpiggin@yahoo.com.au Jared Hulbert wrote: > The biggest improvement is in the way AXFS allows for each page to be XIP or > not. First, a user collects information about which pages are accessed on a > compressed image for each mmap()ed region from /proc/axfs/volume0. That > 'profile' is used as an input to the image builder. The resulting image has > only the relevant pages uncompressed and XIP. The result is smaller memory > sizes and faster launches. Sounds great, really nice idea. How does it fare with no MMU? Can the profiler and image builder lay out the XIP pages in such a way that no-MMU mmaps can map those regions? No complaint if not, it would be a nice bonus though. -- Jamie