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 12:59:27 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Anthony Liguori <anthony@...emonkey.ws>
Cc:	Avi Kivity <avi@...hat.com>, Pekka Enberg <penberg@...helsinki.fi>,
	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>,
	oerg Roedel <joro@...tes.org>,
	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


* Anthony Liguori <anthony@...emonkey.ws> wrote:

> On 03/21/2010 04:54 PM, Ingo Molnar wrote:
> >* Avi Kivity<avi@...hat.com>  wrote:
> >
> >>On 03/21/2010 10:55 PM, Ingo Molnar wrote:
> >>>Of course you could say the following:
> >>>
> >>>   ' Thanks, I'll mark this for v2.6.36 integration. Note that we are not
> >>>     able to add this to the v2.6.35 kernel queue anymore as the ongoing
> >>>     usability work already takes up all of the project's maintainer and
> >>>     testing bandwidth. If you want the feature to be merged sooner than that
> >>>     then please help us cut down on the TODO and BUGS list that can be found
> >>>     at XYZ. There's quite a few low hanging fruits there. '
> >>That would be shooting at my own foot as well as the contributor's since I
> >>badly want that RCU stuff, and while a GUI would be nice, that itch isn't on
> >>my back.
> >I think this sums up the root cause of all the problems i see with KVM pretty
> >well.
> 
> A good maintainer has to strike a balance between asking more of people than 
> what they initially volunteer and getting people to implement the less fun 
> things that are nonetheless required. [...]

Sorry to be blunt, but i dont think there's a different way to say it: i am a 
user of the software you are maintaining (Qemu) and i dont think you have the 
basis to educate people about what a good maintainer should do to achieve a 
quality end result.

I think you could/should learn much from Linus and others who very much 
require quality to permeate the full dimension of a contribution (including 
usability), beyond the narrow, local scope of the contribution.

Thanks,

	Ingo
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