nvme-fabrics: crash at nvme connect-all

[Steve Wise]

> >> Here it is:
> >> # cat /sys/kernel/debug/cxgb4/0000\:09\:00.4/meminfo
> >> EDC0:           0x0-0x2fffff [3.00 MiB]
> >> EDC1:           0x300000-0x5fffff [3.00 MiB]
> >
> >
> > The "-SO" cards have no external off-chip memory, as seen above.  If it did have
> > off-chip memory there would be a "MC0" and possibly "MC1" lines above with a
> > large amount of memory.    Like this (T580-CR):
> >
> > MC0:            0x600000-0x405fffff [1.00 GiB]
> > MC1:            0x40600000-0x805fffff [1.00 GiB]
> >
> > So your -SO cards will only handle a very small amount of RDMA load.
> >
> 
> Thanks Steve for looking up into this. It's a good testcase then :)
> 
> Marta

Indeed!