From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753774Ab0CVLKm (ORCPT ); Mon, 22 Mar 2010 07:10:42 -0400 Received: from 8bytes.org ([88.198.83.132]:49450 "EHLO 8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750997Ab0CVLKl (ORCPT ); Mon, 22 Mar 2010 07:10:41 -0400 Date: Mon, 22 Mar 2010 12:10:40 +0100 From: oerg Roedel To: Ingo Molnar 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: <20100322111040.GL13108@8bytes.org> References: <84144f021003180951s5207de16p1cdf4b9b04040222@mail.gmail.com> <20100318170223.GB9756@elte.hu> <4BA25E66.2050800@redhat.com> <20100318172805.GB26067@elte.hu> <4BA32E1A.2060703@redhat.com> <20100319085346.GG12576@elte.hu> <4BA3747F.60401@codemonkey.ws> <20100321191742.GD25922@elte.hu> <4BA67B2F.4030101@redhat.com> <20100321203121.GA30194@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100321203121.GA30194@elte.hu> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Mar 21, 2010 at 09:31:21PM +0100, Ingo Molnar wrote: > Lets see one example of that thought process in action: Oprofile. Since you are talking so much about oProfile in this thread I think it is important to mention that the problem with oProfile was not the repository separation. The problem was (and is) that the kernel and the user-space parts are maintained by different people who dont talk to each other or have a direction where they want to go with the project. Basically the reason of the oProfile failure is a disfunctional community. I told the kernel-maintainer several times to also maintain user-space but he didn't want that. The situation with KVM is entirely different. Avi commits to kvm.git and qemu-kvm.git so he maintains both. Anthony is working to integrate the qemu-kvm changes into upstream qemu. Further these people work very closely together and the community around KVM works well too. The problems that oProfile has are not even in sight for KVM. Joerg