> On 24 Jan 2017, at 18:40, Damjan Marion (damarion) <damar...@cisco.com> wrote: > >> >> On 24 Jan 2017, at 18:26, Stephen Hemminger <step...@networkplumber.org> >> wrote: >> >> On Tue, 24 Jan 2017 17:14:42 +0000 >> "Damjan Marion (damarion)" <damar...@cisco.com> wrote: >> >>> Is anybody aware of any valid reason why we cannot switch to uio_pci_generic >>> as default PCI uio driver in ubuntu packages? >>> >>> I think generally people don’t like out-of-tree modules, so as long as we >>> are getting >>> the same service from uio_pci_generic we should use it… >>> >>> Thanks, >>> >>> Damjan > >> uio_pci_generic does not support MSI or MSI-X interrupts, only legacy INTX. > > I know but do we really care? > >> >> The preference should always be to use VFIO. Even on systems without IOMMU. > > What is the perf impact? > > Also, I just tried with kernel 4.8 on rangeley ATOM, and i got: > > [536030.250072] vfio-pci: probe of 0000:00:14.0 failed with error -22 > [536030.253271] vfio-pci: probe of 0000:00:14.0 failed with error -22 > > I guess I’m doing something wrong….
This explains: grep VFIO_NOIO /boot/config-4.8.0-34-generic # CONFIG_VFIO_NOIOMMU is not set So vfio is out of the game of being default choice, people can still switch simply with one line change in /etc/vpp/startup.conf. _______________________________________________ vpp-dev mailing list vpp-dev@lists.fd.io https://lists.fd.io/mailman/listinfo/vpp-dev
