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vfio-pci vs pci-assign for sr-iov "direct" ports

Hi All,

I am using Ubuntu 14.04 on my compute node which is running "juno" release. After updating my kernel lately from 3.13 to 3.16, I noticed I cannot create anymore VMs with sr-iov ports. Further investigation of nova-compute logs showed that since the upgrade, during VM spawning qemu is using "-device vfio-pci" instead of "-device pci-assign".

I would like to stick with pci-assign devices.

Any idea how to make nova\qemu use it instead of vfio-pci?

Thanks in advance,

Itai

vfio-pci vs pci-assign for sr-iov "direct" ports

Hi All,

I am using Ubuntu 14.04 on my compute node which is running "juno" release. After updating my kernel lately from 3.13 to 3.16, I noticed I cannot create anymore VMs with sr-iov ports. Further investigation of nova-compute logs showed that since the upgrade, during VM spawning qemu is using "-device vfio-pci" instead of "-device pci-assign".pci-assign" of the VM vNICs.

I would like to stick with pci-assign devices.

Any idea how to make nova\qemu use it instead of vfio-pci?

Thanks in advance,

Itai