[openib-general] user_mad questions

[Sean Hefty]

Hal Rosenstock wrote:
>>>    Sean> Second, when a failed send is reported, there's a mismatch
>>>    Sean> between the size of the data copied to the user and the size
>>>    Sean> returned from ib_umad_read().  The copied data is
>>>    Sean> sizeof(ib_user_mad) + sizeof(ib_mad).  The reported size
>>>    Sean> turns out to be sizeof(ib_user_mad) + sizeof(ib_mad_hdr).
>>>    Sean> It appears that the data copy is off.
>>>
>>>Yes, that seems to be a long-standing bug.  Not sure when that was introduced.
>>
>>I have a patch to fix this as part of some general RMPP cleanup/optimizations.
> 
> Should the fix for this be separate from other RMPP changes ?

It will take some time for me to separate out this change, but I can do that.  I 
didn't discover this until near the end of the updates that I was trying to do, 
which were actually related to receive handling...

- Sean