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

[Michael S. Tsirkin]

Quoting r. Roland Dreier <roland at topspin.com>:
> Subject: Re: RFD: uverbs and hotplug
 
>     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.
> 

It seems that it can be made to work for the umad device this way -
MAD packets can just be thrown away since they are unreliable anyway.

-- 
MST - Michael S. Tsirkin