[openib-general] tavor quirks etc (opensm compliance etc)

[Eitan Zahavi]

Or Gerlitz wrote:
> Eitan Zahavi wrote:
>   
>> According to the IBTA spec:
>> 1. In order for MTU and MTUSelector to have any effect their component 
>> mask bits MUST be set to 1 in the query
>> 2. Behavior of the SM is defined with small "freedom" to choose between 
>> multiple matching MTU values if they exist.
>> 3. The table below summarizes all options:
>>
>> Assuming the value M represents the lowest MTU on the path
>> We denote by M-1 the MTU value one level below M (e.g. 1K if M=2K)
>> R represents the MTU value in the request. Similarly R-1 is one below R 
>> and R+1 is one above R.
>>
>> Query-MTU | Query-Sel | Resp by Spec     | OpenSM Should  | OpenSM Quirk 
>> w. Tavor End Port
>> ----------------------------------------------------------------------------------------- 
>>
>> UNDEFINED | UNDEFINED | <= M             | M              | min(M,1K)
>> R         | <         | <= min(R-1, M)   | min(R-1, M)    | min(R-1, M, 1K)
>> R         | =         | R if M>=R /ERR   | R if M>=R /ERR | R if M>=R /ERR
>> R         | >         | R < <= M         | R+1 if M>R /ERR| R+1 if M>R /ERR
>>
>> I have built some test code for making sure OpenSM does what is required.
>> Apparently it does not. In any case the M is not identical to R it fails 
>> the request.
>>
>> I am working on fixing OpenSM.
>>
>> Any comments are welcome.
>>     
>
> OK Eitan, thanks for putting the time on this, we will be able to 
> provide feedback tomorrow or later this week.
>
> Is the direction suggested by this matrix and patch that follows 
> orthogonal to the open-sm tavor quirk patch?
>   
The table above has a column named "OpenSM Quirk" which describes the 
expected result of the tavor quirk patch.
If that is not the outcome of that patch = it should be fixed. I am not 
proposing a new type of behavior - just to fix the existing one.
> Or.
>
>
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