[openib-general] [PATCHv2] IPoIB CM Experimental support

[Michael S. Tsirkin]

> Hi, Michael,
> 
> Tried this patch, it didn't work on ehca. I couldn't change the mode from
> datagram to connected from /sys/class.

It's wroking as designed in that respect.  ehca does not implement srq - without
srq, there is no way to prepost receive buffers for a resonable number of
connections without running out of memory.

So it is falling back on datagram mode.
Talk to ehca guys to implement srq and connected mode will be enabled.

> And when unloading ib_ipoib module, all the connections to that node gone,
> rmmod ib_ipoib hung. The kernel is 2.6.19.

Probably a bug in error handling somewhere.
Post the sysrq t trace and I'll take a look.

-- 
MST