From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jamie Lokier Subject: Re: silent semantic changes with reiser4 Date: Thu, 26 Aug 2004 16:04:34 +0100 Message-ID: <20040826150434.GF5733@mail.shareable.org> References: <20040825204240.GI21964@parcelfarce.linux.theplanet.co.uk> <20040825212518.GK21964@parcelfarce.linux.theplanet.co.uk> <20040826001152.GB23423@mail.shareable.org> <20040826003055.GO21964@parcelfarce.linux.theplanet.co.uk> <20040826010049.GA24731@mail.shareable.org> <412DA40B.5040806@namesys.com> <20040826140500.GA29965@fs.tum.de> <1093530313.11694.56.camel@leto.cs.pocnet.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Adrian Bunk , Hans Reiser , viro@parcelfarce.linux.theplanet.co.uk, Linus Torvalds , Christoph Hellwig , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Alexander Lyamin aka FLX , ReiserFS List Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com To: Christophe Saout Content-Disposition: inline In-Reply-To: <1093530313.11694.56.camel@leto.cs.pocnet.net> List-Id: linux-fsdevel.vger.kernel.org Christophe Saout wrote: > What reiser4 can do, but the VFS can't is to insert or remove data in > the middle of a file. Adding this above the page cache would probably be > almost impossible (truncate seems already complicated enough). That would be one of those "special features" that a VFS-plus-userspace implementation of archive views could take advantage of on reiser4, while using a slower method (sometimes much slower) on all other filesystems. By the way, can reiser4 share parts of files between different files? -- Jamie