Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759610AbZCMVLq (ORCPT ); Fri, 13 Mar 2009 17:11:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756662AbZCMVLi (ORCPT ); Fri, 13 Mar 2009 17:11:38 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:49413 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755463AbZCMVLh (ORCPT ); Fri, 13 Mar 2009 17:11:37 -0400 Date: Fri, 13 Mar 2009 14:01:50 -0700 (PDT) From: Linus Torvalds X-X-Sender: torvalds@localhost.localdomain To: Alexey Dobriyan cc: Sukadev Bhattiprolu , Ying Han , "Serge E. Hallyn" , linux-api@vger.kernel.org, containers@lists.linux-foundation.org, hpa@zytor.com, linux-kernel@vger.kernel.org, Dave Hansen , linux-mm@kvack.org, viro@zeniv.linux.org.uk, mingo@elte.hu, mpm@selenic.com, Andrew Morton , xemul@openvz.org, tglx@linutronix.de Subject: Re: How much of a mess does OpenVZ make? ;) Was: What can OpenVZ do? In-Reply-To: <20090313193500.GA2285@x200.localdomain> Message-ID: References: <1234479845.30155.220.camel@nimitz> <20090226155755.GA1456@x200.localdomain> <20090310215305.GA2078@x200.localdomain> <49B775B4.1040800@free.fr> <20090312145311.GC12390@us.ibm.com> <1236891719.32630.14.camel@bahia> <20090312212124.GA25019@us.ibm.com> <604427e00903122129y37ad791aq5fe7ef2552415da9@mail.gmail.com> <20090313053458.GA28833@us.ibm.com> <20090313193500.GA2285@x200.localdomain> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 812 Lines: 21 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/