[openib-general] Re: RFD: uverbs and hotplug

[Roland Dreier]

    Michael> Okay, but you still must blocks the applications from
    Michael> accessing the hardware - you cant trust them not to.

Right, that's why I said "including remapping any doorbell pages."

    Michael> No, but I know how NIC hotplug works on my laptop: push a
    Michael> button, wait till a little light flashes, pull it out.

Sure, that's easy, because the network layer just throws packets away
when a device disappears.  We already have that working for IPoIB: you
can remove the mthca module and any applications running on top of
IPoIB just see their traffic stop.  This should also work if you PCI
hot-unplug an HCA, although I've never had the hardware to test.

 - R.