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

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Message-ID: <20090402085411.GA29967@gondor.apana.org.au>
Date:	Thu, 2 Apr 2009 16:54:11 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Avi Kivity <avi@...hat.com>
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

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 :)

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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