linux-kernel - Re: [patch 2/4] [RFC] syscalls, x86: Add __NR

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Date:	Wed, 25 Jan 2012 01:31:04 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	linux-kernel@...r.kernel.org,
	Pavel Emelyanov <xemul@...allels.com>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Kees Cook <keescook@...omium.org>, Tejun Heo <tj@...nel.org>,
	Andrew Vagin <avagin@...nvz.org>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Glauber Costa <glommer@...allels.com>,
	Andi Kleen <andi@...stfloor.org>,
	Matt Helsley <matthltc@...ibm.com>,
	Pekka Enberg <penberg@...nel.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Vasiliy Kulikov <segoon@...nwall.com>, Valdis.Kletnieks@...edu
Subject: Re: [patch 2/4] [RFC] syscalls, x86: Add __NR_kcmp syscall v4

On Tue, Jan 24, 2012 at 01:25:16PM -0800, Andrew Morton wrote:
> On Wed, 25 Jan 2012 00:50:39 +0400
> Cyrill Gorcunov <gorcunov@...il.com> wrote:
> 
> > While doing the checkpoint-restore in the userspace
> 
> btw, some questions regarding the overall project: do you guys actually
> have working userspace code which can at least partially perform a c/r?
> What state is all this in?
> 

Yes, we have a number of test-cases which do c/r. See details on
http://criu.org/ . We don't announce it yet since everything is under
heavy development.

> I'd be a bit concerned if we're putting code into mainline which has
> not been demonstrated to achieve any form of successful checkpoint/restore.

	Cyrill
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