On Wed, Mar 1, 2017 at 2:10 AM, ira.weiny <ira.weiny@xxxxxxxxx> wrote: > After the call it occurred to me that we may be missing a bigger picture with > this discussion. In the past we have discussed in the past what exactly a > "struct ib_device" is within the context of the kernel. > > Should we also consider "port hotplug"? > > For example what happens if a Mellanox port is unplugged from an IB port and > plugged into an Ethernet port? Is that considered a "device" hot plug? Yes, this fis a 'device' hotplug. Reconfiguring a ConnectX3 port from one link layer to another requires full device plugout & plugin. And this needs to be done by the sys admin. > What happens if this is a dual port device and only one of the 2 IB ports are > changed? So many things like AH, Path Records, etc are tied to the "device" > but really they should be tied to the port. The newer ConnectX4 (and forward) devices expose a pci function per port, so reconfiguring a port link layer will hotplug only that pci function. Alex -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
