Hi Ian,

Spec for “Support vhost-user in libvirt vif driver” [1] has been approved for 
Kilo. We should have code available by EOW.

We are also working on a mechanism driver for Neutron as well [2]. We started 
working on a 3rd party CI.


[1] https://review.openstack.org/#/c/138736/
[2] https://review.openstack.org/#/c/138742/

From: Ian Wells [mailto:ijw.ubu...@cack.org.uk]
Sent: Saturday, January 10, 2015 1:15 AM
To: OpenStack Development Mailing List
Subject: [openstack-dev] [nova][neutron]VIF_VHOSTUSER

Once more, I'd like to revisit the VIF_VHOSTUSER discussion [1].  I still think 
this is worth getting into Nova's libvirt driver - specifically because there's 
actually no way to distribute this as an extension; since we removed the plugin 
mechanism for VIF drivers, it absolutely requires a code change in the libvirt 
driver.  This means that there's no graceful way of distributing an aftermarket 
VHOSTUSER driver for libvirt.
The standing counterargument to adding it is that nothing in the upstream or 
3rd party CI would currently test the VIF_VHOSTUSER code.  I'm not sure that's 
a showstopper, given the code is zero risk to anyone when it's not being used, 
and clearly is going to be experimental when it's enabled.  So, Nova cores, 
would it be possible to incorporate this without a corresponding driver in base 


[1] https://review.openstack.org/#/c/96140/
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