From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759896AbYDXXXC (ORCPT ); Thu, 24 Apr 2008 19:23:02 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755609AbYDXXP3 (ORCPT ); Thu, 24 Apr 2008 19:15:29 -0400 Received: from brinza.cc.columbia.edu ([128.59.29.8]:59329 "EHLO brinza.cc.columbia.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759318AbYDXXP0 (ORCPT ); Thu, 24 Apr 2008 19:15:26 -0400 Message-ID: <481113FD.3010905@cs.columbia.edu> Date: Thu, 24 Apr 2008 19:13:01 -0400 From: Oren Laadan Organization: Columbia University User-Agent: Thunderbird 2.0.0.12 (X11/20080213) MIME-Version: 1.0 To: Dave Hansen CC: Kirill Korotaev , containers@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Nadia.Derbey@bull.net, Andrew Morton , nick@nick-andrew.net, Alexey Dobriyan Subject: Re: Checkpoint/restart (was Re: [PATCH 0/4] - v2 - Object creation with a specified id) References: <20080418054459.891481000@bull.net> <20080422193612.GA15835@martell.zuzino.mipt.ru> <1208890580.17117.14.camel@nimitz.home.sr71.net> <20080422210130.GA15937@martell.zuzino.mipt.ru> <1208904967.17117.51.camel@nimitz.home.sr71.net> <480ED9D5.1010906@parallels.com> <1208964798.17117.72.camel@nimitz.home.sr71.net> <48103002.5090806@parallels.com> <1209061809.12718.36.camel@nimitz.home.sr71.net> In-Reply-To: <1209061809.12718.36.camel@nimitz.home.sr71.net> X-Enigmail-Version: 0.95.6 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-No-Spam-Score: Local Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Dave Hansen wrote: > On Thu, 2008-04-24 at 11:00 +0400, Kirill Korotaev wrote: >> Yeah... we talked with Andrew yesterday. He mostly agrees with a black >> box. >> He also said an interesting idea, that if you need compatibility >> between the kernels (like we for example, support for migration from >> 2.6.9 to 2.6.18 in OpenVZ) >> you can do image conversion in user-space... > > That sounds compelling to me. I'm definitely willing to explore it. Filtering/converting in user-space has long been part of zap: used to be able to migrate between both minor and major versions of the kernel (always upwards, of course). In fact, I already proposed it as part of the original thread that led eventually to the patch in question: https://lists.linux-foundation.org/pipermail/containers/2008-February/009849.html The need to be able to specify a desired ID (from user-space and/or from in-kernel) remains. Oren. > Any thoughts on what we should start with? What can we get merged, most > easily? > > -- Dave > > _______________________________________________ > Containers mailing list > Containers@lists.linux-foundation.org > https://lists.linux-foundation.org/mailman/listinfo/containers