ib1: timing out; N sends not completed

[Julian Stecklina]

Hello,

I have two machines connected back-to-back via Infiniband with Mellanox
Infinihost III adapters. One machine runs Linux (Fedora 19) and the
other 9-STABLE.

I sometimes get:

ib1: timing out; 47 sends not completed
ib1: timing out; 1 sends not completed
ib1: timing out; 56 sends not completed

or similar and TCP connections will be stuck after each timeout for a
while. It is relatively easy to reproduce this behavior with NetPIPE.

Any advice?

Julian

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