Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262639AbUCHR5X (ORCPT ); Mon, 8 Mar 2004 12:57:23 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262664AbUCHR5X (ORCPT ); Mon, 8 Mar 2004 12:57:23 -0500 Received: from gateway-1237.mvista.com ([12.44.186.158]:49908 "EHLO av.mvista.com") by vger.kernel.org with ESMTP id S262639AbUCHR5M (ORCPT ); Mon, 8 Mar 2004 12:57:12 -0500 Message-ID: <404CB3F0.2020701@mvista.com> Date: Mon, 08 Mar 2004 09:57:04 -0800 From: Steve Longerbeam Organization: MontaVista Software User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Pavel Machek CC: LKML Subject: Re: new special filesystem for consideration in 2.6/2.7 References: <40462AA1.7010807@mvista.com> <20040305220950.GA5352@openzaurus.ucw.cz> In-Reply-To: <20040305220950.GA5352@openzaurus.ucw.cz> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1631 Lines: 58 Pavel Machek wrote: >Hi! > > > >>(PRAMFS). It was originally developed for three major consumer >>electronics companies for use in their smart cell phones >>and other consumer devices. >> >>An intro to PRAMFS along with a technical specification >>is at the SourceForge project web page at >>http://pramfs.sourceforge.net/. A patch for 2.6.3 has >>been released at the SF project site. >> >> > >Well, I'd certainly love to see some usable linux cell phones. >(Well, one such beast in my pocket would probably be enough :-) >(Is there a way to make linux cell phone without second >cpu just for GSM stack?) > one of the chips used in their cell phones is the TI OMAP1510. It has an embedded TMS320c55 DSP as well as an ARM 925. > >Comments about pramfs: RAM is not really random access, >you'll find that doing byte-sized random reads is way slower >than linear read, >but you are right that it is very different from disk. > > >How do you handle powerfail in the middle of write? > good question, I don't - not in software anyway. But the companies I mentioned may have implemented some kind of h/w safe shutdown, but I'm not sure. >Do you run fsck or do you have some kind of logging? > If you mean journaling, no, pramfs is not a journaling fs. And you're right, I still need to write an fsck for pramfs. At this point there is no way to recover a corrupt fs. Steve - 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/