On Fri, 10 Aug 2012 11:34:32 +0800
"Peter Huang(Peng)" <peter.huangp...@huawei.com> wrote:

> Hi,All
> 
> I searched from git-log, and found that until now we have vhost TX zero-copy 
> experiment feature, how
> about RX zero-copy?
> 
> For XEN, net-back also only has TX zero-copy, Is there any reason that RX 
> zero-copy still not implemented?
> 
There is no guarantee that packet will ever be read by receiver. This means 
zero-copy could
create memory back pressure stalls.
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