On 10/3/2012 5:02 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 ;-)
For IB, but I wasn't sure about iWarp. It doesn't look like it's used there
though.
If not, I'll apply a patch to rping, plus submit a fix for the kernel to
validate the value.
--
Not used by iwarp drivers...
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