Message-ID: <4AC3D6DC.9010500@free.fr>
Date: Thu, 01 Oct 2009 00:08:28 +0200
From: Daniel Lezcano <daniel.lezcano@free.fr>
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To: Dan Smith <danms@us.ibm.com>
CC: "Serge E. Hallyn" <serue@us.ibm.com>, linux-api@vger.kernel.org,
       containers@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
       linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
       torvalds@linux-foundation.org, mingo@elte.hu, xemul@openvz.org
Subject: Re: [PATCH 00/80] Kernel based checkpoint/restart [v18]
References: <1253749920-18673-1-git-send-email-orenl@librato.com>	<20090924154139.2a7dd5ec.akpm@linux-foundation.org>	<20090928163704.GA3327@us.ibm.com> <4AC20BB8.4070509@free.fr>	<87iqf0o5sf.fsf@caffeine.danplanet.com> <4AC38477.4070007@free.fr>	<87eipoo0po.fsf@caffeine.danplanet.com> <4AC39CE5.9080908@free.fr> <877hvgnv6z.fsf@caffeine.danplanet.com>
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Dan Smith wrote:
> DL> Yep, I agree. But you didn't answer the question, what are the
> DL> network resources you plan to checkpoint / restart ?  eg. you let
> DL> the container to setup your network, will you restore netdev
> DL> statistics ? the mac address ? ipv4 ? ipv6 ?
>
> Yes, Yes, Yes, and Yes.  I'm making the assumption that the common
> case will be with a veth device in the container and that all of the
> aforementioned attributes should be copied over.  In the future case
> where we could potentially have a real device in the container, it
> probably doesn't make sense to copy the mac address.
>   

Be careful with the assumptions ;)
> DL> Is it possible to do a detailed list of network resources you plan
> DL> to CR with the different items you will address from userspace and
> DL> kernel space ?
>
> I'm sure it's possible, but no, I haven't planned out everything for
> the next year.  If you have strong feelings about what should be done
> in user and kernel space, feel free to share :)
>   

Dan,

I just want to understand what is your plan. If you say "yes I will 
checkpoint / restart" ipv4, ipv6, netdev statistics, etc ...  you should 
be able to give at least a small list of network resources you will 
checkpoint and how you will restart them, no ?

> DL> Argh ! I was hoping there was something else than the source code
>
> The header file makes it pretty clear what is going on, 
Certainly for you.
We are a little far away of the sys_checkpoint / sys_restart simple 
syscalls we talked about at the cr-minisummit in 2008.

Regards,
     -- Daniel


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