[openib-general] ib_cancel_mad and the CM

[Libor Michalek]

On Wed, Feb 23, 2005 at 02:28:54PM -0800, Sean Hefty wrote:
> There are never duplicated values for wr_ids outstanding at the same 
> time, which is what the above quote was referring to.  To me, the 
> problem seems more related to the inability to synchronize canceling a 
> MAD with processing its completion.  Without that ability, it seems 
> that the user needs to have some sort of increasing wr_id value.
> 
> I did look at what the sa_query did for canceling queries, but I 
> _think_ it may have a similar issue.  It's just harding to hit because 
> it checks both a pointer and an index.  But if a problem does exist, 
> then a user could cancel a query issued by another user.

  Are you saying that the layer which assigns the wr_id is not the
same layer that actually executes the cancel? That would seem like
a recipe for problems. 

-Libor