netdev - Re: [RFC PATCH 00/17] virtual-bus

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Date:	Thu, 02 Apr 2009 12:03:32 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
CC:	Anthony Liguori <anthony@...emonkey.ws>, andi@...stfloor.org,
	ghaskins@...ell.com, linux-kernel@...r.kernel.org, agraf@...e.de,
	pmullaney@...ell.com, pmorreale@...ell.com, rusty@...tcorp.com.au,
	netdev@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [RFC PATCH 00/17] virtual-bus

Herbert Xu wrote:
> On Thu, Apr 02, 2009 at 09:46:49AM +0300, Avi Kivity wrote:
>   
>> I don't understand this.  If we had good interfaces, all that userspace  
>> would do is translate guest physical addresses to host physical  
>> addresses, and translate the guest->host protocol to host API calls.  I  
>> don't see anything there that benefits from being in the kernel.
>>
>> Can you elaborate?
>>     
>
> I think Greg has expressed it clearly enough.
>
> At the end of the day, the numbers speak for themselves.  So if
> and when there's a user-space version that achieves the same or
> better results, then I will change my mind :)
>   

Like Anthony said, the problem is with the kernel->user interfaces.  We 
won't have a good user space virtio implementation until that is fixed.

-- 
error compiling committee.c: too many arguments to function

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