Re: Problem running rping over Intel adapters

[Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

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On 10/3/2012 5:50 PM, Hefty, Sean wrote:
>> 1) rping, on the client side, clears the conn_params for the newly to be
>> attempted connection, then sets:
>>
>> 	conn_param.responder_resources = 1;
>> 	conn_param.initiator_depth = 1;
>> 	conn_param.retry_count = 10;
> 
> 
>> 2) the qib driver enforces a maximum of 7 for retry_count.  I don't see
>> anything in the spec that specifies a maximum for this entry, and in
>> particular I know it doesn't call out for 7 to mean infinite retries
>> like it does for rnr_retry_count.
> 
> On IB, retry count is a 3-bit value.  See the CM REQ message.
> 
> The kernel rdma cm should probably check for a valid value and reduce it accordingly.

Then it's also fair to say that right now rping passes a known invalid
value and needs fixed ;-)


-- 
Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
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