linux-kernel - Re: [Ksummit-2010-discuss] checkpoint-restart: naked patch

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Date:	Thu, 18 Nov 2010 12:13:05 +0300
From:	Pavel Emelyanov <xemul@...allels.com>
To:	Tejun Heo <tj@...nel.org>
CC:	"Serge E. Hallyn" <serge@...lyn.com>,
	Oren Laadan <orenl@...columbia.edu>,
	Kapil Arya <kapil@....neu.edu>,
	Gene Cooperman <gene@....neu.edu>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Matt Helsley <matthltc@...ibm.com>,
	Linux Containers <containers@...ts.osdl.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: [Ksummit-2010-discuss] checkpoint-restart: naked patch

On 11/17/2010 06:46 PM, Tejun Heo wrote:
> Hello, Serge.
> 
> On 11/17/2010 04:39 PM, Serge E. Hallyn wrote:
>>> I'm sorry but in-kernel CR already looks like a major misdesign to me.
>>
>> By this do you mean the very idea of having CR support in the kernel?
>> Or our design of it in the kernel?
> 
> The former, I'm afraid.

Can you elaborate on this please?

>> Let's go back to July 2008, at the containers mini-summit, where it
>> was unanimously agreed upon that the kernel was the right place
>> (Checkpoint/Resetart [CR] under
>> http://wiki.openvz.org/Containers/Mini-summit_2008_notes ), and that
>> we would start by supporting a single task with no resources.  Was
>> that whole discussion effectively misguided, in your opinion?  Or do
>> you feel that since the first steps outlined in that discussion
>> we've either "gone too far" or strayed in the subsequent design?
> 
> The conclusion doesn't seem like such a good idea, well, at least to
> me for what it's worth.  Conclusions at summits don't carry decisive
> weight.  It'll still have to prove its worthiness for mainline all the
> same and in light of already working userland alternative and the
> expanded area now covered by virtualization, the arguments in this
> thread don't seem too strong.
> 
> Thanks.
> 

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