HI Gary, Regards, Keith
> On Sep 2, 2016, at 8:39 AM, Mussar, Gary <gmussar at ciena.com> wrote: > > The pktgen docs state that the rte_kni.ko should be loaded with > lo_mode=lo_mode_ring however the source in dpdk master does not appear to > understand this value. This wasn't an issue in the past since the kni code > would simply disable lo_mode if you passed in an unknown value. > > The Ubuntu 4.4.0-36-generic kernel no longer loads the module if the passed > value is not in the table of known values (the 4.4.0-34-generic kernel would > still load the module). > > I have 2 questions: > 1) > Why does pktgen specify using a value for lo_mode that the source does not > support? Is lo_mode_ring something that is coming but not yet submitted? The KNI support and kernel module is more of a DPDK issue then Pktgen, which is the application on top of DPDK. I do not know the reason lo_mode_ring is not working correctly. Look in the Maintainers file and see who maintains the KNI code. > > 2) > Is the Ubuntu kernel being over aggressive in parameter checking or is this a > "good" thing? If it is good, then should the pktgen docs be indicating that > an unsupported value be used for lo_mode? I assume the Ubuntu Kernel is attempting to protect itself. Each time the kernel is updated it is a good think to recompile DPDK and the KNI kernel module or the module may not load because of a version mis-match. > > Gary
