Re: [libvirt] PF interface brought down if guest using a VF in hostdev mode under 802.1Qbh
On 08/08/2012 01:21 PM, Nishank Trivedi (nistrive) wrote:
On 8/7/12 8:15 PM, "Laine Stump" <laine(a)laine.org>
wrote:
> Yes, I believe you are correct that virNetDevSetOnline is being called
> with the wrong device name (I could be wrong though - is there maybe
> some odd rule that the PF must be UP before the VFs will be up?
PF should be UP prior to VF only if there is some proxy'ing or some
control data being sent by PF on behalf of VF. Same could be true for
bringing VF down.
> In case
> case, we certainly shouldn't be setting the PF to IFF_DOWN). But in the
> case of PCI passthrough, does it even need to be called at all?
Not for PF for sure. While VF is getting disassociated with port profile,
VF interface still needs to be brought down. So virNetDevSetOnline should
be passed VF interface, if vf >= 0.
> Cc'ing Roopa in case she missed this in all the other traffic.
Invalid email id, cc'ing Christian instead.
Yes, I didn't realize until I got the bounce from that mail that Roopa
had moved. (also didn't pay attention to the fact that you are at Cisco,
so would have contacted her anyway :-)
It sounds like you guys have a good understanding of the details, and
the proper setup to test it with 802.1Qbh, so please write up a patch
and send it in. I'll review it and test it here too (although I can only
test netdev PCI passthrough *without* 802.1Qbh).
Thanks for finding the root of the problem!