From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758062AbYDAKv0 (ORCPT ); Tue, 1 Apr 2008 06:51:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755897AbYDAKvR (ORCPT ); Tue, 1 Apr 2008 06:51:17 -0400 Received: from lazybastard.de ([212.112.238.170]:57565 "EHLO longford.logfs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756639AbYDAKvR (ORCPT ); Tue, 1 Apr 2008 06:51:17 -0400 Date: Tue, 1 Apr 2008 12:51:04 +0200 From: =?utf-8?B?SsO2cm4=?= Engel To: Artem Bityutskiy Cc: Artem Bityutskiy , Adrian Hunter , Jan Engelhardt , LKML , joern@lazybastard.org Subject: Re: UBIFS vs Logfs (was [RFC PATCH] UBIFS - new flash file system) Message-ID: <20080401105104.GE7465@logfs.org> References: <1206629746-4298-1-git-send-email-Artem.Bityutskiy@nokia.com> <47F0DD49.7010302@nokia.com> <20080331132047.GA31660@logfs.org> <47F1C78D.2050300@yandex.ru> <47F1CE9D.4080709@nokia.com> <20080401092548.GC7465@logfs.org> <47F202CD.4000804@yandex.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <47F202CD.4000804@yandex.ru> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 1 April 2008 12:39:25 +0300, Artem Bityutskiy wrote: > > I'm not sure what you mean. In UBIFS we have lprops area, where we store > per-LEB accounting. UBI lets it possible to have it on a fixed position. > The accounting is a separate B-tree. Lprops area has its own independent > garbage collector. You should probably refer the white paper for more > information. Fair enough. The obvious downside of all this is depending on UBI, which has a linear scan. My goal was to avoid the linear scan completely. It is a harder goal and I haven't reached it yet. Imo it is reachable and I will continue going in that direction. You picked the route of using UBI, which makes a lot of stuff easier. It is a fair approach and I don't mind you taking it. It has drawbacks, but so has everything else. Jörn -- Anything that can go wrong, will. -- Finagle's Law