From mboxrd@z Thu Jan 1 00:00:00 1970 From: viro@parcelfarce.linux.theplanet.co.uk Subject: Re: silent semantic changes with reiser4 Date: Sun, 29 Aug 2004 19:36:29 +0100 Sender: linux-fsdevel-owner@vger.kernel.org Message-ID: <20040829183629.GP21964@parcelfarce.linux.theplanet.co.uk> References: <412F7D63.4000109@namesys.com> <20040827230857.69340aec.pj@sgi.com> <20040829150231.GE9471@alias> <4132205A.9080505@namesys.com> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <4132205A.9080505@namesys.com> List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Hans Reiser Cc: flx@msu.ru, Paul Jackson , riel@redhat.com, ninja@slaphack.com, torvalds@osdl.org, diegocg@teleline.es, jamie@shareable.org, christophe@saout.de, vda@port.imtp.ilyichevsk.odessa.ua, christer@weinigel.se, spam@tnonline.net, akpm@osdl.org, wichert@wiggy.net, jra@samba.org, hch@lst.de, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, flx@namesys.com, reiserfs-list@namesys.com On Sun, Aug 29, 2004 at 11:28:42AM -0700, Hans Reiser wrote: > just use a view, and skip the options on the system calls. if you cd to > /nometas/your_home_directory_path you don't see the metafiles. Why is a > view better than a syscall flag? Because it lets the user choose what > he wants without recompiling to do it. This kind of a view requires no > coding because you can just mount the root filesystem two ways, one with > the -nopseudos mount option, and one without it. *What*? OK, now I want detailed explanation of the reasons why that doesn't create cache coherency problems. Do you have an analysis of locking in the entire thing?