linux-kernel - Re: [RFC] Unify KVM kernel-space and user-space code into a single project

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Date:	Mon, 22 Mar 2010 20:49:36 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Joerg Roedel <joro@...tes.org>
Cc:	Avi Kivity <avi@...hat.com>,
	Anthony Liguori <anthony@...emonkey.ws>,
	Pekka Enberg <penberg@...helsinki.fi>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Sheng Yang <sheng@...ux.intel.com>,
	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	Marcelo Tosatti <mtosatti@...hat.com>,
	Jes Sorensen <Jes.Sorensen@...hat.com>,
	Gleb Natapov <gleb@...hat.com>,
	Zachary Amsden <zamsden@...hat.com>, ziteng.huang@...el.com,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Fr?d?ric Weisbecker <fweisbec@...il.com>
Subject: Re: [RFC] Unify KVM kernel-space and user-space code into a single
 project


* Joerg Roedel <joro@...tes.org> 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
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