Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759193AbYFQOpt (ORCPT ); Tue, 17 Jun 2008 10:45:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757902AbYFQOpl (ORCPT ); Tue, 17 Jun 2008 10:45:41 -0400 Received: from lazybastard.de ([212.112.238.170]:51661 "EHLO longford.logfs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755961AbYFQOpk (ORCPT ); Tue, 17 Jun 2008 10:45:40 -0400 Date: Tue, 17 Jun 2008 16:45:26 +0200 From: =?utf-8?B?SsO2cm4=?= Engel To: Maxim Shchetynin Cc: linux-fsdevel@vger.kernel.org, Jan Engelhardt , Matthew Wilcox , linux-kernel@vger.kernel.org Subject: Re: AZFS file system proposal Message-ID: <20080617144526.GA28448@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> <20080617105300.GA28310@logfs.org> <20080617160628.79efd2d9@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: <20080617160628.79efd2d9@mercedes-benz.boeblingen.de.ibm.com> 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: 1008 Lines: 24 On Tue, 17 June 2008 16:06:28 +0200, Maxim Shchetynin wrote: > > > > My personal question when looking at this is: Why not use ext2? It > > Same reason we don't use ext2 for file system in RAM - we don't need any expensive caching and readahead mechanisms for devices which are as fast as main memory (or almost as fast). Well, with the '-o xip' option I mentioned below, there is no caching or readahead. The direct_access method you use as well was developed for ext2. Or rather for xip2fs, another new filesystem. After some review, that was shot down and a mount option was added to ext2 instead. > > appears to me that an ext2 mounted with '-o xip' would solve the same > > problems. Jörn -- Homo Sapiens is a goal, not a description. -- unknown -- 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/