From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with SMTP id 953456B003D for ; Fri, 13 Mar 2009 20:13:57 -0400 (EDT) Received: by fxm26 with SMTP id 26so2851633fxm.38 for ; Fri, 13 Mar 2009 17:13:55 -0700 (PDT) Date: Sat, 14 Mar 2009 03:20:59 +0300 From: Alexey Dobriyan Subject: Re: How much of a mess does OpenVZ make? ;) Was: What can OpenVZ do? Message-ID: <20090314002059.GA4167@x200.localdomain> References: <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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org To: Linus Torvalds 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 List-ID: On Fri, Mar 13, 2009 at 02:01:50PM -0700, Linus Torvalds wrote: > > > 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. I think (I think) you're seriously underestimating what's doable with kernel C/R and what's already done. I was told (haven't seen it myself) that Oracle installations and Counter Strike servers were moved between boxes just fine. They were run in specially prepared environment of course, but still. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org