[ofa-general] [PATCH] IB/core: handle race between elements in qork queues after event

[Moni Shoua]

> I guess I can believe things don't get worse but I still don't know how
> this makes things better.  With the current code the request is lost
> because it goes to the wrong SM; with the new code the request is failed
> by the SA layer.  So in both cases the consumer just has to try again.
> 
> So is there some practical benefit we see by adding this code?
> 
>  - R.
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In general I see the benefit in faster detection of wrong SM ah. Before the patch consumers 
need to wait for  a timeout before the detection and after the patch it happens immediately 
on return from the function. This improves the performance of an SM failover scenario.

Some applications  may get the benefit above  only they handle new return code (EAGAIN) specifically 
but this patch opens the door for such improvement. 

thanks

 MoniS