[ewg] Re: [ofa-general] Re: dapl attribute bug

[Steve Wise]

Bug 1613 opened to track this.  

I think we need this for ofed-1.4.1.

Steve.


Steve Wise wrote:
> Hey Arlin,
>
> Did this ever get fixed?
>
> I think UNH is seeing this issue still.
>
>
>
> Steve Wise wrote:
>> Davis, Arlin R wrote:
>>>  
>>>
>>>  
>>>> The DAPL dat_ia_attr->max_lmr_block_size is a u32, yet the dapl 
>>>> code maps this to the linux ib_device_attr->max_mr_size which is u64.
>>>>
>>>> This causes dapltest to fail in some cases when running over 
>>>> chelsio which sets max_mr_size to 0x100000000 (4GB).  The dapl code 
>>>> truncates the value to 0. See dapl/openib_cma/dapl_ib_util.c.
>>>>
>>>> I'm not sure what the fix should be, but maybe the dapl code should 
>>>> set anything over 32 bits to 0xffffffff?
>>>>
>>>>     
>>>
>>> This attribute changed with DAT 2.0 to match the 32-bit ibv_sge
>>> length field. Since there are no direct max lmr segments mappings
>>> I will need add some checks when setting max_lmr_block_size from
>>> max_mr_size. Thanks.
>>>
>>> -arlin
>>
>> I'll test your fix when its ready.  Lemme know.
>>
>>
>> Steve.
>>
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