>> Er...no. It will lose this event. Depending on the event...the carnage
>> varies. We'll take a look at this.
>>
>
>This behavior is consistent with the Infiniband CM (see
>drivers/infiniband/core/cm.c function cm_recv_handler()). But I think
>we should at least log an error because a lost event will usually stall
>the rdma connection.
I believe that there's a difference here. For the Infiniband CM, an allocation
error behaves the same as if the received MAD were lost or dropped. Since MADs
are unreliable anyway, it's not so much that an IB CM event gets lost, as it
doesn't ever occur. A remote CM should retry the send, which hopefully allows
the connection to make forward progress.
- Sean
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