ib0: failed send event (status=1, wrid=35 vend_err 69)
I believe that this is causing the QP to transition into the error state.
ib_mthca 0000:08:00.0: modify QP 3->3 returned status 10.
The mthca status of 0x10 indicates a bad QP state. The transition from 3->3 is
RTS to RTS, but the QP is not in the RTS state, which makes sense given the
previous error. The other receive side errors in the bug report are a fallout
from not recovering from the send error.
I don't know if this causes any problems, but at first glance it appears that
the IPoIB CM code begins listening for connection requests before the code has
had a chance to join the IPoIB broadcast group. This allows a connection to
form before the broadcast traffic is ready. Someone more familiar with the code
than I am will need to determine if this can lead to any undesirable race
conditions.
- Sean
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