Comment 7 for bug 1789074

Let first get it merged in master :)

> -----Original Message-----
> From: <email address hidden> <email address hidden> On Behalf Of
> Noam Angel
> Sent: Thursday, August 30, 2018 7:30 PM
> To: Moshe Levi <email address hidden>
> Subject: [Bug 1789074] Re: failed to boot guest with vnic_type direct when
> rx_queue_size and tx_queue_size are set
>
> If the regression is also in OSP13, can you backport to queens aswell?
>
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> Title:
> failed to boot guest with vnic_type direct when rx_queue_size and
> tx_queue_size are set
>
> Status in OpenStack Compute (nova):
> In Progress
> Status in OpenStack Compute (nova) rocky series:
> New
>
> Bug description:
> Description of problem:
>
> Nova compute forces the virtio RX/TX Queue Size also on SRIOV devices.
> This makes VM spawn to fail. The configurable RX/TX Queue Size code is
> similar all the way from OSP10 to OSP13, so it's possible the issue is present
> also on other releases.
>
> Version-Release number of selected component (if applicable):
> OSP13 z3
>
> How reproducible:
>
> (quick and dirty way)
> Change nova config file
>
> # crudini --set /var/lib/config-data/puppet-
> generated/nova_libvirt/etc/nova/nova.conf libvirt rx_queue_size 1024
> # crudini --set /var/lib/config-data/puppet-
> generated/nova_libvirt/etc/nova/nova.conf libvirt tx_queue_size 1024
>
> # restart nova_compute container
> docker restart nova_compute
>
> # boot a VM with an SRIOV (PF or VF) interface
>
> Actual results:
> Nova add on the sriov port section rx_queue_size
>
> <interface type="hostdev" managed="yes">
> <mac address="fa:16:3e:9d:f0:52"/>
> <driver name="vhost" rx_queue_size="1024"/>
> <source>
> <address type="pci" domain="0x0000" bus="0x01" slot="0x14"
> function="0x7"/>
> </source>
> <vlan>
> <tag id="435"/>
> </vlan>
>
> Expected results:
>
> <interface type='hostdev' managed='yes'>
> <mac address='fa:16:3e:83:b2:84'/>
> <driver name='vfio'/>
> <source>
> <address type='pci' domain='0x0000' bus='0x01' slot='0x14'
> function='0x7'/>
> </source>
> <vlan>
> <tag id='435'/>
> </vlan>
> <alias name='hostdev0'/>
> <address type='pci' domain='0x0000' bus='0x00' slot='0x05'
> function='0x0'/>
> </interface>
>
> Additional info:
>
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