[ofw] HCA Description field format differences between Windows & Linux?

Smith, Stan stan.smith at intel.com
Thu Jun 3 12:17:41 PDT 2010


Hefty, Sean wrote:
>>>> How do the Linux drivers set this?  Isn't there a local MAD you
>>>> issue to the HCA to set the node description?
>>>
>>> I think linux reads this from a file.
>>
>> What I meant is, how does Linux program this into the HCA so that a
>> request for node description returns the proper data?
>
> My guess is part of the bring up scripts to load the drivers write a
> node description value to a file, which is seen by the HCA driver.
>
> For example, on a system running kernel.org 2.6.34-rc7 the node_desc
> that I see is:
>
> MT25208 InfiniHostEx Mellanox Technologies
>
> If I write to the node_desc file, the description changes as
> expected.  However, if I unload then reload the driver, the node_desc
> is reset.
>
> -Sean

What does ibnetdiscover report for the local node?
I would expect 'hostname HCA-1 MT25208 InfiniHostEx Mellanox Technologies' ?
The implication being something above the HCA driver has prefixed 'hostname HCA-#'.



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