Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964935AbWEUW6W (ORCPT ); Sun, 21 May 2006 18:58:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751554AbWEUW6W (ORCPT ); Sun, 21 May 2006 18:58:22 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:57570 "EHLO amd.ucw.cz") by vger.kernel.org with ESMTP id S1751486AbWEUW6W (ORCPT ); Sun, 21 May 2006 18:58:22 -0400 Date: Mon, 22 May 2006 00:57:37 +0200 From: Pavel Machek To: Andrew Morton Cc: Herbert Poetzl , serue@us.ibm.com, linux-kernel@vger.kernel.org, dev@sw.ru, devel@openvz.org, sam@vilain.net, ebiederm@xmission.com, xemul@sw.ru, haveblue@us.ibm.com, clg@fr.ibm.com Subject: Re: [PATCH 0/9] namespaces: Introduction Message-ID: <20060521225735.GA9048@elf.ucw.cz> References: <20060518154700.GA28344@sergelap.austin.ibm.com> <20060518103430.080e3523.akpm@osdl.org> <20060519124235.GA32304@MAIL.13thfloor.at> <20060519081334.06ce452d.akpm@osdl.org> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20060519081334.06ce452d.akpm@osdl.org> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.11+cvs20060126 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1371 Lines: 37 On P? 19-05-06 08:13:34, Andrew Morton wrote: > Herbert Poetzl wrote: > > > > let me > > give a simple example here: > > Examples are useful. > > > "pid virtualization" > > > > - Linux-VServer doesn't really need that right now. > > we are perfectly fine with "pid isolation" here, we > > only "virtualize" the init pid to make pstree happy > > > > - Snapshot/Restart and Migration will require "full" > > pid virtualization (that's where Eric and OpenVZ > > are heading towards) > > snapshot/restart/migration worry me. If they require complete > serialisation of complex kernel data structures then we have a problem, > because it means that any time anyone changes such a structure they need to > update (and test) the serialisation. > > This may be a show-stopper, in which case maybe we only need to virtualise > pid #1. Well, if pid #1 virtualization is only needed for pstree, we may want to fix pstree instead :-). Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - 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/