[dpdk-dev] [PATCH v4] vhost: Add indirect descriptors support to the TX path

[Yuanhan Liu]

On Mon, Oct 17, 2016 at 01:23:23PM +0200, Maxime Coquelin wrote:
> >On my side, I just setup 2 Windows 2016 VMs, and confirm the issue.
> >I'll continue the investigation early next week.
> 
> The root cause is identified.
> When INDIRECT_DESC feature is negotiated, Windows guest uses indirect
> for both Tx and Rx descriptors, whereas Linux guests (Virtio PMD &
> virtio-net kernel driver) use indirect only for Tx.
> 
> I'll implement indirect support for the Rx path in vhost lib, but the
> change will be too big for -rc release.
> I propose in the mean time to disable INDIRECT_DESC feature in vhost
> lib, we can still enable it locally for testing.
> 
> Yuanhan, is it ok for you?

That's okay.

> 
> >Has anyone already tested Windows guest with vhost-net, which also has
> >indirect descs support?
> 
> I tested and confirm it works with vhost-net.

I'm a bit confused then. IIRC, vhost-net also doesn't support indirect
for Rx path, right?

	--yliu