From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756106Ab0CVTtw (ORCPT ); Mon, 22 Mar 2010 15:49:52 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:57695 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755520Ab0CVTtv (ORCPT ); Mon, 22 Mar 2010 15:49:51 -0400 Date: Mon, 22 Mar 2010 20:49:36 +0100 From: Ingo Molnar To: Joerg Roedel Cc: Avi Kivity , Anthony Liguori , Pekka Enberg , "Zhang, Yanmin" , Peter Zijlstra , Sheng Yang , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Marcelo Tosatti , Jes Sorensen , Gleb Natapov , Zachary Amsden , ziteng.huang@intel.com, Arnaldo Carvalho de Melo , Fr?d?ric Weisbecker Subject: Re: [RFC] Unify KVM kernel-space and user-space code into a single project Message-ID: <20100322194936.GB3306@elte.hu> References: <20100319085346.GG12576@elte.hu> <4BA3747F.60401@codemonkey.ws> <20100321191742.GD25922@elte.hu> <4BA67B2F.4030101@redhat.com> <20100321203121.GA30194@elte.hu> <20100322111040.GL13108@8bytes.org> <20100322122228.GH3483@elte.hu> <20100322134633.GD1940@8bytes.org> <20100322163215.GC18796@elte.hu> <20100322192059.GG1940@8bytes.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100322192059.GG1940@8bytes.org> User-Agent: Mutt/1.5.20 (2009-08-17) X-ELTE-SpamScore: 0.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=0.0 required=5.9 tests=none autolearn=no SpamAssassin version=3.2.5 _SUMMARY_ Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Joerg Roedel wrote: > On Mon, Mar 22, 2010 at 05:32:15PM +0100, Ingo Molnar wrote: > > I dont know how you can find the situation of Alpha comparable, which is a > > legacy architecture for which no new CPU was manufactored in the past ~10 > > years. > > > > The negative effects of physical obscolescence cannot be overcome even by the > > very best of development models ... > > The maintainers of that architecture could at least continue to maintain it. > But that is not the case. Most newer syscalls are not available and overall > stability on alpha sucks (kernel crashed when I tried to start Xorg for > example) but nobody cares about it. Hardware is still around and there are > still some users of it. You are arguing why maintainers do not act as you suggest, against the huge negative effects of physical obscolescence? Please use common sense: they dont act because ... there are huge negative effects due to physical obscolescence? No amount of development model engineering can offset that negative. Thanks, Ingo