> 
> Hi Ciara and Ian,
> 
> I'm checking the zero-copy support on both rx/tx side when
> using ovs-dpdk with vhostuser and dpdkport.
> Assuming PVP, IIUC[1,2], the rx (P to V) does not have zero-copy and
> the V to P has zero copy support by enabling dq-zero-copy.
> 
> Am I understanding this correctly?

Hi William,

That's correct. 

Thanks,
Ciara

> 
> Thank you!
> William
> 
> [1]
> commit 10087cba9deec95aaea080c49f2cbe648ebe92c8
> Author: Ciara Loftus <[email protected]>
> Date:   Wed Jan 31 10:44:54 2018 +0000
> 
>     netdev-dpdk: Add support for vHost dequeue zero copy (experimental)
> 
>     Zero copy is disabled by default. To enable it, set the 'dq-zero-copy'
>     option to 'true' when configuring the Interface:
> 
> [2]
> commit 8b7baf5f3fc6598694b94715ad9786440973dc3f
> Author: Ian Stokes <[email protected]>
> Date:   Fri Oct 19 14:30:15 2018 +0100
> 
>     Docs: Remove zero-copy QEMU limitation.
> 
>     Remove note regarding zero-copy compatibility with QEMU >= 2.7.
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