Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759873AbYJJROP (ORCPT ); Fri, 10 Oct 2008 13:14:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762041AbYJJRNx (ORCPT ); Fri, 10 Oct 2008 13:13:53 -0400 Received: from e35.co.us.ibm.com ([32.97.110.153]:38381 "EHLO e35.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761883AbYJJRNw (ORCPT ); Fri, 10 Oct 2008 13:13:52 -0400 Date: Fri, 10 Oct 2008 12:13:50 -0500 From: "Serge E. Hallyn" To: Greg Kurz Cc: Cedric Le Goater , linux-kernel@vger.kernel.org, containers@lists.linux-foundation.org, Ingo Molnar , arnd@arndb.de, Dave Hansen Subject: Re: [RFC][PATCH 2/2] first callers of process_deny_checkpoint() Message-ID: <20081010171350.GA28112@us.ibm.com> References: <20081009190405.13A253CB@kernel> <20081009190406.1B257119@kernel> <48EF2BAB.1010009@fr.ibm.com> <20081010140430.GA14640@us.ibm.com> <1223657132.10017.42.camel@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1223657132.10017.42.camel@localhost.localdomain> User-Agent: Mutt/1.5.17+20080114 (2008-01-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1438 Lines: 34 Quoting Greg Kurz (gkurz@fr.ibm.com): > On Fri, 2008-10-10 at 09:04 -0500, Serge E. Hallyn wrote: > > Remember a part of Ingo's motivation is to push c/r developers to > > address the lacking features that users use most, earlier. So the > > warnings and subsequent email complaints are what we're after. Hence a > > single 'checkpointable or not' flag. > > > > Given the single flag, how do you know at sys_mq_unlink() whether the > > process also has an opensocket? > > > > Rather than make this tracking facility more complicated and intrusive, > > if people complain that they couldn't checkpoint bc of a warning about > > aio, then we implement aio c/r! We don't just try and reduce the amount > > of time that you can't checkpoint bc of lack of aio c/r support :) > > > > -serge > > Serge, > > It's exactly what I meant before, the tracking facility would be awfully > complicated. It cannot be done that way. > But there's also something awkward with the flag thing : can you provide > right now an exhaustive list of all the places where you must raise it ? > > I'd rather do some heavy checking at checkpoint time. Noone is saying that we are not going to do that. -serge -- 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/