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Date: Thu, 15 Oct 2009 17:04:54 +0200
From: "Michael S. Tsirkin" <mst@redhat.com>
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Subject: [Qemu-devel] Re: Raw vs. tap
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To: Anthony Liguori <anthony@codemonkey.ws>
Cc: kvm-devel <kvm@vger.kernel.org>, qemu-devel@nongnu.org, Paul Brook <paul@codesourcery.com>, Jens Osterkamp <jens@linux.vnet.ibm.com>, Sridhar Samudrala <sri@us.ibm.com>

On Thu, Oct 15, 2009 at 08:32:03AM -0500, Anthony Liguori wrote:
> Michael S. Tsirkin wrote:
>> On Wed, Oct 14, 2009 at 05:53:56PM -0500, Anthony Liguori wrote:
>>   
>>> I would be much more inclined to consider  taking raw and improving 
>>> the performance long term if guest<->host  networking worked.  This 
>>> appears to be a fundamental limitation though  and I think it's 
>>> something that will forever plague users if we include  this feature.
>>>     
>>
>> In fact, I think it's fixable with a raw socket bound to a macvlan.
>> Would that be enough?
>>   
>
> What setup does that entail on the part of a user?  Wouldn't we be back  
> to square one wrt users having to run archaic networking commands in  
> order to set things up?

Unlike bridge, qemu could set up macvlan without disrupting
host networking. The only issue would be cleanup if qemu
is killed.

> Regards,
>
> Anthony Liguori
>