Herbert Xu wrote:
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?
Yes.
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.
It doesn't copy and queue the packet? We use O_NONBLOCK and poll() so
we can tell when we can queue without blocking.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
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