I/O Errors due to keepalive timeouts with NVMf RDMA

[Sagi Grimberg]

> Not that I disagree with you, but two different (not connected) fabrics
> (OmniPath and IB) and both are broken, while I see no problems on IPoIB?
> 
> Not sure how likely this is.

I didn't mean that the fabric is broken for sure, I was simply saying
that having a 64 byte send not making it through a switch port sounds
like a problem to me.