From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764828AbXGYH3S (ORCPT ); Wed, 25 Jul 2007 03:29:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752599AbXGYH3G (ORCPT ); Wed, 25 Jul 2007 03:29:06 -0400 Received: from rex.snapgear.com ([203.143.235.140]:38755 "EHLO cyberguard.com.au" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752287AbXGYH3E (ORCPT ); Wed, 25 Jul 2007 03:29:04 -0400 Message-ID: <46A6FBBA.7080702@snapgear.com> Date: Wed, 25 Jul 2007 17:28:58 +1000 From: Greg Ungerer User-Agent: Thunderbird 1.5.0.10 (X11/20070301) MIME-Version: 1.0 To: Tim Bird CC: Lindsay Roberts , LKML , celinux-dev@tree.celinuxforum.org Subject: Re: [Celinux-dev] Re: [PATCH] fs: Add romfs version 2 References: <8734b7880707122301m400294d4nf12072f949c95fa4@mail.gmail.com> <20070717013635.d6d0b124.akpm@linux-foundation.org> <20070717192100.GE11166@waste.org> <8734b7880707172016v530ce775p108910f7baf9de8e@mail.gmail.com> <469E4791.5040806@am.sony.com> In-Reply-To: <469E4791.5040806@am.sony.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Tim Bird wrote: > Lindsay Roberts wrote: >> Yes, my experience has been that it has been almost chillingly close >> to .5k per regular file increase in partition size. I know in >> applications in which size is utterly critical this may be slightly >> unattractive, but in cases where romfs is chosen for its byte >> reproducibility and read-only nature the size/performance tradeoff is >> fairly advantageous. > > The size increase makes this a complete non-starter in the > embedded configs I'm familiar with. Size is still the number > one problem using Linux in consumer electronics products. > > I have nothing against this patch, if it achieve some speedups > for other environments. But I wouldn't expect to see this > option used much in embedded devices. Romfs is used quite extensively in the uClinux space, and mostly on very small flash setups (can be as small as 1MB of flash). Any filesystem size increase would not be welcomed :-) But ofcourse as long as the romfs filesystem code still supports the older version there is no problem (and it looks like it does). Regards Greg ------------------------------------------------------------------------ Greg Ungerer -- Chief Software Dude EMAIL: gerg@snapgear.com Secure Computing Corporation PHONE: +61 7 3435 2888 825 Stanley St, FAX: +61 7 3891 3630 Woolloongabba, QLD, 4102, Australia WEB: http://www.SnapGear.com