From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alexander Graf <agraf@suse.de>
Subject: Re: [PATCH] exit if we fail to initialize kvm
Date: Wed, 29 Jul 2009 14:28:27 +0200
Message-ID: <4A70406B.3050000@suse.de>
References: <1248814374-7953-1-git-send-email-glommer@redhat.com> <A9392DF0-D82E-46CD-A36F-B9E70E390ABE@suse.de> <20090728212852.GY4776@poweredge.glommer> <EE4DDC7C-6CBA-4A9E-8F4A-A193E9F8BBB7@suse.de> <4A7021AC.80403@siemens.com> <4A703767.6050301@redhat.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Cc: Jan Kiszka <jan.kiszka@siemens.com>,
	Glauber Costa <glommer@redhat.com>,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>
To: Avi Kivity <avi@redhat.com>
Return-path: <kvm-owner@vger.kernel.org>
Received: from cantor2.suse.de ([195.135.220.15]:56473 "EHLO mx2.suse.de"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1754562AbZG2M21 (ORCPT <rfc822;kvm@vger.kernel.org>);
	Wed, 29 Jul 2009 08:28:27 -0400
In-Reply-To: <4A703767.6050301@redhat.com>
Sender: kvm-owner@vger.kernel.org
List-ID: <kvm.vger.kernel.org>

Avi Kivity wrote:
> On 07/29/2009 01:17 PM, Jan Kiszka wrote:
>> I just wonder now if/when qemu-kvm will switch over to the
>> kvm-by-default-off policy of upstream?
>>    
>
> That will surely inconvenience/surprise a lot of users.
>
> A migration path could be:
>
> - add -accel
> - start warning when -accel is not used, encouraging people to use -accel
> - time passes
> - switch default to tcg (maybe unless invoked with kvm in argv[0])
> - time passes
> - remove warning
>

I would prefer:

- add -accel (default to kvm)
- give a message to use -accel tcg when the user wants tcg
- make -accel go kvm,kqemu,tcg in qemu upstream
- have distros / management tools decide which accel they like

Alex