On 3/16/2016 8:22 AM, Panu Matilainen wrote: > On 03/16/2016 10:19 AM, Ferruh Yigit wrote: >> On 3/16/2016 7:26 AM, Panu Matilainen wrote: >>> On 03/14/2016 05:32 PM, Ferruh Yigit wrote: >>>> On 3/9/2016 11:17 AM, Ferruh Yigit wrote: >>>>> This patch sent to keep record of latest status of the work. >>>>> >>>>> >>>>> This is slow data path communication implementation based on existing KNI. >>>>> >>>>> Difference is: librte_kni converted into a PMD, kdp kernel module is >>>>> almost >>>>> same except all control path functionality removed and some >>>>> simplification done. >>>>> >>>>> Motivation is to simplify slow path data communication. >>>>> Now any application can use this new PMD to send/get data to Linux kernel. >>>>> >>>>> PMD supports two communication methods: >>>>> >>>>> 1) KDP kernel module >>>>> PMD initialization functions handles creating virtual interfaces (with >>>>> help of >>>>> kdp kernel module) and created FIFO. FIFO is used to share data between >>>>> userspace and kernelspace. This is default method. >>>>> >>>>> 2) tun/tap module >>>>> When KDP module is not inserted, PMD creates tap interface and transfers >>>>> packets using tap interface. >>>>> >>>>> In long term this patch intends to replace the KNI and KNI will be >>>>> depreciated. >>>>> >>>> >>>> Self-NACK: Will work on another option that does not introduce new >>>> kernel module. >>>> >>> >>> Hmm, care to elaborate a bit? The second mode of this PMD already was >>> free of external kernel modules. Do you mean you'll be just removing >>> mode 1) from the PMD or looking at something completely different? >>> >>> Just thinking that tun/tap PMD sounds like a useful thing to have, I >>> hope you're not abandoning that. >>> >> >> It will be KNI PMD. >> Plan is to have something like KDP, but with existing KNI kernel module. >> There will be tun/tap support as fallback. > > Hum, now I'm confused. I was under the impression everybody hated KNI > and wanted to get rid of it, and certainly not build future solutions on > top of it? >
We can't remove it. We can't replace/improve it -you were one of the major opposition to this. This doesn't leave more option other than using it. There won't be any update in KNI kernel module, library + sample app will be converted into PMD. Regards, ferruh
