linux-kernel - Re: How much of a mess does OpenVZ make? ;) Was: What can OpenVZ do?

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Date:	Fri, 13 Mar 2009 14:01:50 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Alexey Dobriyan <adobriyan@...il.com>
cc:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>,
	Ying Han <yinghan@...gle.com>,
	"Serge E. Hallyn" <serue@...ibm.com>, linux-api@...r.kernel.org,
	containers@...ts.linux-foundation.org, hpa@...or.com,
	linux-kernel@...r.kernel.org,
	Dave Hansen <dave@...ux.vnet.ibm.com>, linux-mm@...ck.org,
	viro@...iv.linux.org.uk, mingo@...e.hu, mpm@...enic.com,
	Andrew Morton <akpm@...ux-foundation.org>, xemul@...nvz.org,
	tglx@...utronix.de
Subject: Re: How much of a mess does OpenVZ make? ;) Was: What can OpenVZ
 do?



On Fri, 13 Mar 2009, Alexey Dobriyan wrote:
> > 
> > Let's face it, we're not going to _ever_ checkpoint any kind of general 
> > case process. Just TCP makes that fundamentally impossible in the general 
> > case, and there are lots and lots of other cases too (just something as 
> > totally _trivial_ as all the files in the filesystem that don't get rolled 
> > back).
> 
> What do you mean here? Unlinked files?

Or modified files, or anything else. "External state" is a pretty damn 
wide net. It's not just TCP sequence numbers and another machine.

		Linus
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