From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755369AbZCCNPm (ORCPT ); Tue, 3 Mar 2009 08:15:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752589AbZCCNPd (ORCPT ); Tue, 3 Mar 2009 08:15:33 -0500 Received: from bombadil.infradead.org ([18.85.46.34]:35305 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752322AbZCCNPd (ORCPT ); Tue, 3 Mar 2009 08:15:33 -0500 Date: Tue, 3 Mar 2009 08:15:28 -0500 From: Christoph Hellwig To: Dave Hansen Cc: Christoph Hellwig , containers , "linux-kernel@vger.kernel.org" , Ingo Molnar , Alexey Dobriyan Subject: Re: [RFC][PATCH 5/8] add f_op for checkpointability Message-ID: <20090303131528.GB10931@infradead.org> References: <20090227203425.F3B51176@kernel> <20090227203431.D1E697CB@kernel> <20090228205329.GB4254@infradead.org> <1236013556.26788.466.camel@nimitz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1236013556.26788.466.camel@nimitz> User-Agent: Mutt/1.5.18 (2008-05-17) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Mar 02, 2009 at 09:05:56AM -0800, Dave Hansen wrote: > On Sat, 2009-02-28 at 15:53 -0500, Christoph Hellwig wrote: > > Also the double-use of the op seem not very nice to me. Is there any > > real life use case were you would have the operation on a file but > > sometimes not allow checkpoiting? > > I'm still reaching here... > > I was thinking of /proc. Opening your own /proc/$$/* would certainly be > considered OK. But, doing it for some other process not in your pid > namespace would not be OK and would not be checkpointable. > > I know we're not quite in real-life territory here, yet, but I'm still > thinking. That mighr be a good enough excuse, I was just wondering what the use case was.