From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from [140.186.70.92] (port=37210 helo=eggs.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1OBVNp-0004bp-MP
	for qemu-devel@nongnu.org; Mon, 10 May 2010 11:59:10 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69)
	(envelope-from <anthony@codemonkey.ws>) id 1OBVNb-0007qG-CQ
	for qemu-devel@nongnu.org; Mon, 10 May 2010 11:59:01 -0400
Received: from mail-gx0-f209.google.com ([209.85.217.209]:48273)
	by eggs.gnu.org with esmtp (Exim 4.69)
	(envelope-from <anthony@codemonkey.ws>) id 1OBVNb-0007qA-9r
	for qemu-devel@nongnu.org; Mon, 10 May 2010 11:58:51 -0400
Received: by gxk1 with SMTP id 1so2258610gxk.16
	for <qemu-devel@nongnu.org>; Mon, 10 May 2010 08:58:50 -0700 (PDT)
Message-ID: <4BE82D35.1060401@codemonkey.ws>
Date: Mon, 10 May 2010 10:58:45 -0500
From: Anthony Liguori <anthony@codemonkey.ws>
MIME-Version: 1.0
References: <20100510081118.GI24787@redhat.com>
	<4BE82ADA.6000302@codemonkey.ws> <20100510155400.GB4497@redhat.com>
In-Reply-To: <20100510155400.GB4497@redhat.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Subject: [Qemu-devel] Re: [PATCHv2] Support for booting from virtio disks
List-Id: qemu-devel.nongnu.org
List-Unsubscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Gleb Natapov <gleb@redhat.com>
Cc: seabios@seabios.org, qemu-devel@nongnu.org, kvm@vger.kernel.org

On 05/10/2010 10:54 AM, Gleb Natapov wrote:
> On Mon, May 10, 2010 at 10:48:42AM -0500, Anthony Liguori wrote:
>    
>> On 05/10/2010 03:11 AM, Gleb Natapov wrote:
>>      
>>> This patch adds native support for booting from virtio disks to Seabios.
>>>
>>> Signed-off-by: Gleb Natapov<gleb@redhat.com>
>>>        
>> A related problem that I think we need to think about how we solve
>> is indicating to Seabios which device we want to boot from
>>
>> With your patch, a user can select a virtio device explicitly or if
>> they use only one virtio device, it will Just Work.
>>
>> However, if a user uses IDE and virtio, or a user has multiple
>> disks, they cannot select a device via -boot.
>>
>>      
> Isn't this problem unrelated to this patch?  I mean if I start qemu with
> two ide devices can I specify from qemu command line which one I want to
> boot from?
>    

That's sort of what I'm asking.  If you compare this approach to 
extboot, extboot provided a capability to select a disk.  I think it can 
be argued though that this isn't a necessary feature to carry over and 
I'm looking for additional opinions on that.

Regards,

Anthony Liguori