From: Christoph Hellwig Subject: Re: [PATCH 4/7][TAKE5] support new modes in fallocate Date: Wed, 11 Jul 2007 10:04:41 +0100 Message-ID: <20070711090441.GB18301@infradead.org> References: <20070625134500.GE1951@amitarora.in.ibm.com> <20070625150320.GA8686@amitarora.in.ibm.com> <20070625214626.GJ5181@schatzie.adilger.int> <20070626103247.GA19870@amitarora.in.ibm.com> <20070630102111.GB23568@infradead.org> <20070630165246.GA5159@schatzie.adilger.int> <20070703100848.GA14936@amitarora.in.ibm.com> <20070703103107.GA29763@infradead.org> <20070703114650.GB14936@amitarora.in.ibm.com> <468B31FD.2020703@sgi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "Amit K. Arora" , Christoph Hellwig , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org, adilger@clusterfs.com, David Chinner , suparna@in.ibm.com, cmm@us.ibm.com, xfs@oss.sgi.com To: Timothy Shimmin Return-path: Received: from pentafluge.infradead.org ([213.146.154.40]:48474 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757463AbXGKJEo (ORCPT ); Wed, 11 Jul 2007 05:04:44 -0400 Content-Disposition: inline In-Reply-To: <468B31FD.2020703@sgi.com> Sender: linux-ext4-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org On Wed, Jul 04, 2007 at 03:37:01PM +1000, Timothy Shimmin wrote: > We use this capability in XFS at the moment. > I think this is mainly for DMF (HSM) but is done via the xfs handle > interface > (xfs_open_by_handle) AFAICT. > You're not :) You're using an O_INVIBLE equivalent (as described below), which would be a useful thing to have at the VFS level, but adding hacks to some system calls only wouldn't help any HSM system. It's just useless API clutter.