From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755276AbZHNS7j (ORCPT ); Fri, 14 Aug 2009 14:59:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753941AbZHNS7i (ORCPT ); Fri, 14 Aug 2009 14:59:38 -0400 Received: from metis.ext.pengutronix.de ([92.198.50.35]:38423 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753934AbZHNS7i (ORCPT ); Fri, 14 Aug 2009 14:59:38 -0400 Date: Fri, 14 Aug 2009 20:58:52 +0200 From: Robert Schwebel To: Jamie Lokier Cc: Zan Lynx , linux-kernel@vger.kernel.org, linux-embedded@vger.kernel.org, Arjan van de Ven , Tim Bird , kernel@pengutronix.de Subject: Re: New fast(?)-boot results on ARM Message-ID: <20090814185852.GO13320@pengutronix.de> References: <20090814170228.GM13320@pengutronix.de> <4A85AAC4.7050505@acm.org> <20090814184651.GA12021@shareable.org> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20090814184651.GA12021@shareable.org> X-Sent-From: Pengutronix Entwicklungszentrum Nord - Hildesheim X-URL: http://www.pengutronix.de/ X-IRC: #ptxdist @freenode X-Accept-Language: de,en X-Accept-Content-Type: text/plain X-Impressum: Pengutronix - Linux Solutions for Science and Industry Handelsregister: Amtsgericht Hildesheim, HRA 2686 Peiner Strasse 6-8, 31137 Hildesheim, Germany Phone: +49-5121-206917-0 | Fax: +49-5121-206917-5555 Inhaber: Dipl.-Ing. Robert Schwebel X-Message-Flag: See Message Headers for Impressum X-Uptime: 20:57:36 up 9 days, 6:16, 5 users, load average: 0.00, 0.00, 0.00 User-Agent: Mutt/1.5.18 (2008-05-17) X-SA-Exim-Connect-IP: 2001:6f8:1178:2:215:17ff:fe12:23b0 X-SA-Exim-Mail-From: rsc@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 14, 2009 at 07:46:51PM +0100, Jamie Lokier wrote: > Zan Lynx wrote: > > Or maybe its cheap and slow flash. In that case I think your only > > hope is to make all the code as small as possible and/or find a > > different flash filesystem that does not have to read so much of the > > device to mount. Perhaps use a read-only compressed filesystem for > > the system binaries and reflash it for software upgrades. Only init > > and mount the writable flash for user-storable data well after > > system boot has finished. > > Fwiw, logfs claims to mount quickly, but I haven't heard much about it > in recent months and http://logfs.org/logfs/ implies it's not really > stable yet. But maybe if you're working on a prototype that doesn't > matter so much. Is logfs ready for production in the meantime? Last time I checked it was still more or less Jörn's pet project and ubifs seemed much more mature. rsc -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |