linux-kernel - Re: Checkpoint/restart (was Re: [PATCH 0/4] - v2

Open Source and information security mailing list archives

Message-ID: <481113FD.3010905@cs.columbia.edu>
Date:	Thu, 24 Apr 2008 19:13:01 -0400
From:	Oren Laadan <orenl@...columbia.edu>
To:	Dave Hansen <dave@...ux.vnet.ibm.com>
CC:	Kirill Korotaev <dev@...allels.com>,
	containers@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, Nadia.Derbey@...l.net,
	Andrew Morton <akpm@...ux-foundation.org>,
	nick@...k-andrew.net, Alexey Dobriyan <adobriyan@...il.com>
Subject: Re: Checkpoint/restart (was Re: [PATCH 0/4] - v2 -  Object	creation
 with a specified id)

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
> 
> _______________________________________________
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> Containers@...ts.linux-foundation.org
> https://lists.linux-foundation.org/mailman/listinfo/containers
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