linux-kernel - Re: [PATCH 0/9] OpenVZ kernel based checkpointing/restart

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Message-ID: <20081020165117.GA25885@us.ibm.com>
Date:	Mon, 20 Oct 2008 11:51:17 -0500
From:	"Serge E. Hallyn" <serue@...ibm.com>
To:	Oren Laadan <orenl@...columbia.edu>
Cc:	Daniel Lezcano <dlezcano@...ibm.com>, Louis.Rilling@...labs.com,
	containers@...ts.linux-foundation.org,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, Andrey Mirkin <major@...nvz.org>
Subject: Re: [PATCH 0/9] OpenVZ kernel based checkpointing/restart

Quoting Oren Laadan (orenl@...columbia.edu):
> This is a misconception: my patches are not "internal checkpoint". My
> patches are basically "external checkpoint" by design, which *also*
> accommodates self-checkpointing (aka internal). The same holds for the
> restart. The implementation is demonstrated with "self-checkpoint" to
> avoid complicating things at this early stage of proof-of-concept.
> 
> For multiple processes all that is needed is a container and a loop
> on the checkpoint side, and a method to recreate processes on the
> restart side. Andrew suggests to do it in kernel space, I still have
> doubts.

Yes I still prefer in-kernel.  Can you elaborate on advantages of doing
more work in userspace?

> While I held out the multi-process part of the patch so far because I

Yup, and i appreciate your restraint until now :)  It made your patchset
much easier to review.

> was explicitly asked to do it, it seems like this would be a good time
> to push it out and get feedback.

Can you send that out as a patch(set) on top of your v7?  I'd love to
see (and test) it.

thanks,
-serge
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