[openib-general] Re: RDMA Generic Connection Management

[Sean Hefty]

Michael S. Tsirkin wrote:
> How is this different from what we have with ib_verbs now?

With ib_verbs, users receive notification of device addition/removal. 
This interface doesn't require receiving that notification.

> I think that reasonable ULPs must register for hotplug events
> in the ib layer, anyway.
> So when they get a device removal callback, they close the qps etc.
> 
> Makes sense?

This opens up the possibility for a user to receive a reference to a 
device that they may not have received previous notification for. 
Similarly, the device could have been removed before the call returned, 
making the pointer invalid.

- Sean