Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757036AbYFQKxz (ORCPT ); Tue, 17 Jun 2008 06:53:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754708AbYFQKxq (ORCPT ); Tue, 17 Jun 2008 06:53:46 -0400 Received: from lazybastard.de ([212.112.238.170]:48068 "EHLO longford.logfs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754257AbYFQKxp (ORCPT ); Tue, 17 Jun 2008 06:53:45 -0400 Date: Tue, 17 Jun 2008 12:53:00 +0200 From: =?utf-8?B?SsO2cm4=?= Engel To: Jan Engelhardt Cc: Maxim Shchetynin , linux-fsdevel@vger.kernel.org, Matthew Wilcox , linux-kernel@vger.kernel.org Subject: Re: AZFS file system proposal Message-ID: <20080617105300.GA28310@logfs.org> References: <20080609104650.4f220492@mercedes-benz.boeblingen.de.ibm.com> <20080609125530.GF30405@parisc-linux.org> <20080610104919.504b9826@mercedes-benz.boeblingen.de.ibm.com> <20080617110655.59c915da@mercedes-benz.boeblingen.de.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: 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 Content-Length: 1695 Lines: 40 On Tue, 17 June 2008 11:35:10 +0200, Jan Engelhardt wrote: > On Tuesday 2008-06-17 11:06, Maxim Shchetynin wrote: > > >I would say you can either mmap it or place a file system on it. > > The help text implies that I *need* azfs to mmap it - and that sounds > like a Rube Goldberg machine. Some people actually prefer filesystems over raw devices for a variety of reasons: - each file brings its own address space, which offers memory protection from other processes, - files can have owners and permission bits, - files hide the fragmentation of the underlying device from users, - a file system provides a common and well-understood api for devices with less common or well-understood apis, - etc. Those reasons are as valid for azfs as for any other filesystem. I have no doubt that azfs is useful. It probably wouldn't hurt to express the merits of the filesystem and the problems it is supposed to solve a little better. So far most criticism was based on the fact that noone understood what the hell it was all about. My personal question when looking at this is: Why not use ext2? It appears to me that an ext2 mounted with '-o xip' would solve the same problems. Jörn -- To announce that there must be no criticism of the President, or that we are to stand by the President, right or wrong, is not only unpatriotic and servile, but is morally treasonable to the American public. -- Theodore Roosevelt, Kansas City Star, 1918 -- 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/