From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932083AbWDLGx4 (ORCPT ); Wed, 12 Apr 2006 02:53:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932088AbWDLGx4 (ORCPT ); Wed, 12 Apr 2006 02:53:56 -0400 Received: from cantor.suse.de ([195.135.220.2]:13697 "EHLO mx1.suse.de") by vger.kernel.org with ESMTP id S932083AbWDLGxz (ORCPT ); Wed, 12 Apr 2006 02:53:55 -0400 To: Kirill Korotaev Cc: Kir Kolyshkin , akpm@osdl.org, Nick Piggin , sam@vilain.net, linux-kernel@vger.kernel.org, "Eric W. Biederman" , serue@us.ibm.com, Alexey Kuznetsov , herbert@13thfloor.at Subject: Re: [Devel] Re: [RFC] Virtualization steps References: <1143228339.19152.91.camel@localhost.localdomain> <200603282029.AA00927@bbb-jz5c7z9hn9y.digitalinfra.co.jp> <4429A17D.2050506@openvz.org> <443151B4.7010401@tmr.com> <443B873B.9040908@sw.ru> <443CA47E.4070809@sw.ru> From: Andi Kleen Date: 12 Apr 2006 08:53:53 +0200 In-Reply-To: <443CA47E.4070809@sw.ru> Message-ID: User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Kirill Korotaev writes: > >>Moreover, in OpenVZ live migration allows to migrate 32bit VPSs > >>between i686 and x86-64 Linux machines. > > > How would that work when x86-64 32bit programs have 4GB of address > > space and native on i386 programs only 3GB? > we limit address space of i386 apps on x86-64 to 3GB due to > compatibility issues - some applications don't work with not 3:1 GB VM > split. The only program I'm aware of with this problem is an very old JDK used in the Oracle installer - and the official documented fix for this is to run it with linux32 --3gb Limiting everybody just for that single bug seems quite excessive. -Andi