[Nouveau] I would like to offer my help.

[Marcin Kościelnicki]

> Hello, Nouveau devs!
>
>  I would like you to know that I have a laptop with 2 Geforce GTX
> 285m cards on board in an SLI config, I know the SLI part is not
> relevant at this point, but I still would like to offer my rig for
> testing single card configs.  If you want to walk me thru what you
> need me to do, just shoot me an email.
>
> Matthew Kolar

This sounds like a perfect configuration to RE the inter-GPU 
communication used by GPUdirect. I don't have time right now to look at 
it, but I should be able to prepare some good instructions next week. 
Basically we'd need to do a combo mmiotrace + valgrind-mmt trace of a 
CUDA application utilising GPUdirect calls in various modes.

The 3d SLI functionality, as tested by me on double-nv50 under linux, 
appears to be implemented entirely using "normal" features - the special 
inter-GPU transfer circuitry is set up, but never actually used. May 
still be worth a trace on nvc0, though.

Marcin Kościelnicki