On 22.08.2019 19:21, Leon Romanovsky wrote: > On Thu, Aug 22, 2019 at 07:05:12PM +0200, Marcin Mielniczuk wrote: >> Thanks a lot, this did the trick. I think this is worth documenting >> somewhere that this step is needed. >> I'll make a PR, would README.md in the rdma-core repo be a good place? > I'm not so sure, but it is better to have in some place instead of not having at all. I think it's the first place one would look for some information. I'll make a PR today or tomorrow. >> Does <NAME> have any significance? I did: >> >> sudo rdma link add siw0 type siw netdev enpXsYYfZ >> >> but the resulting device is called iwpXsYYfZ. I couldn't find a trace of >> `siw0` anywhere. > I would say that it is a bug in kernel part of SIW, because kernel rename > (the thing which change your siw0 to be iw* name) is looking for absence > of mentioning PCI inside of /sys/class/infiniband/siw0/* > https://github.com/linux-rdma/rdma-core/blob/master/kernel-boot/rdma_rename.c#L378 I don't have /sys/class/infiniband/siw0 on my system, only /sys/class/infiniband/iwpXsYYfZ. iwp probably comes from iWARP. Regards, Marcin > That rdma-core line works for RXE and SIW should be similar. > > Thanks > >> On 22.08.2019 17:52, Leon Romanovsky wrote: >>> On Thu, Aug 22, 2019 at 09:13:25PM +0530, Krishnamraju Eraparaju wrote: >>>> On Thursday, August 08/22/19, 2019 at 17:08:49 +0200, Marcin Mielniczuk wrote: >>>>> Hi, >>>>> >>>>> I'm trying to test the recently merged siw module. >>>>> I'm running kernel 5.3-rc5 (taken from the Ubuntu mainline-kernel >>>>> repository [1]) on Ubuntu 18.04 (bionic). >>>>> I also manually installed rdma-core 25.0 from tarball, using the >>>>> included Debian packaging. I installed all the packages but ibacm. >>>>> >>>>> After booting the new kernel I manually loaded the kernel module by >>>>> >>>>> modprobe siw >>>>> modprobe rdma_ucm >>>>> >>>>> Then ibv_devinfo shows: "No IB devices found". >>>>> dmesg only shows: >>>>> [ 29.856751] SoftiWARP attached >>>>> >>>>> According to this tutorial, [2] it should be enough to just load the siw >>>>> module. (unlike RXE, where one needs to use rxe_cfg to set up the >>>>> interface) >>>>> Is this a bug in siw or just a configuration issue on my side? >>>> Have you done "rdma link"? >>>> >>>> rdma link add <NAME> type siw netdev <NETDEV> >>>> >>>> http://man7.org/linux/man-pages/man8/rdma-link.8.html >>> BTW, the same goes for RXE and rxe_cfg is discouraged. >>> >>> Thanks >>> >>>>> Thanks, >>>>> Marcin >>>>> >>>>> [1] https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.3-rc5/ >>>>> [2] https://budevg.github.io/posts/tutorials/2017/04/29/rdma-101-1.html >>>>> >>
