On Tue, Oct 16, 2018 at 05:25:46PM +0000, Weiny, Ira wrote: > I'm going to top post this because it seems like what I have to say is not directly related to any of the comments so far. > > It seems like ibacm is broken. I think in 2 ways. > > 1) It should be able to start without ib_umad being loaded. Probably yes, at least enough to NAK a request > 2) It should try to load ib_umad should requests come in on the > socket. Or at least fail the request with a log message of the > reason for the failure. Because this is a misconfiguration of a > running system. Probably.. > I'm not opposed to not starting ibacm on install. I think systemd > can auto start through the socket mechanism discussed. > > But I do have a question regarding the netlink interface from the > kernel. Would systemd start ibacm on a query from the kernel? Can > it? I'm far from a systemd expert. Yes, it already does via this systemd magic: # Bind to PF_NETLINK, NETLINK_RDMA, RDMA_NL_GROUP_LS # Supported in systemd > 234 ListenNetlink=rdma 4 Jason
