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

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Message-ID: <20090403114828.GA10465@gondor.apana.org.au>
Date:	Fri, 3 Apr 2009 19:48:28 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Avi Kivity <avi@...hat.com>
Cc:	Gerd Hoffmann <kraxel@...hat.com>, ghaskins@...ell.com,
	anthony@...emonkey.ws, andi@...stfloor.org,
	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 Fri, Apr 03, 2009 at 02:46:04PM +0300, Avi Kivity wrote:
>
> The host writes the packet to tap, at which point it is consumed from  
> its point of view.  The host would like to mention that if there was an  
> API to notify it when the packet was actually consumed, then it would  
> gladly use it.  Bonus points if this involves not copying the packet.

We're using write(2) for this, no? That should invoke netif_rx_ni
which blocks until the packet is "processed", which usually means
that it's placed on the NIC's hardware queue.

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