[PATCH 0/2] Get rid of transport layer retry count config parameter

Sagi Grimberg sagi at grimberg.me
Thu Jun 23 00:09:36 PDT 2016


>>> This parameter was added in order to support a proper timeout for
>>> error recovery before the spec defined a periodic keep-alive.
>>>
>>> Now that we have periodic keep-alive, we don't need a user configurable
>>> transport layer retry count, the keep-alive timeout is sufficient,
>>> transports can retry for as long as they see fit.
>>
>> Isn't there some IB protocol level rationale for a low retry count
>> in various fabric setups?
>
> IIRC the retry count is part of what drives the APM switch over, so
> APM configuration should use a lower value.

Completely agree Jason. Lowering the retry_count is very useful
for APM (Automatic Path Migration).



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