>> Further, again, as I said, aggregation should be able to work at the 
>> same time when fast-path is used. aggr call mac_open() too.
> 
> Maybe I'm missing something, but as far as I know, aggregations can't 
> work with IP interfaces also plumbed, fast-path or no fast-path.  
> They're both active mac clients.  mac_open() should just plain fail with 
> EBUSY for aggregations regardless.
> 
Aggregation cannot use fast-path but it can work together with fast-path. E.g, 
when both IP and aggregation is used over ce and, IP can still use fast-path 
without problem. But when VNIC is created over ce, IP has to fallback to 
slow-path to assure correct functionality.

Thanks
- Cathy

> In any case, that's moot since I now understand why mac_open() can't be 
> used to enable or disable the fast-path.
> 
> -Seb


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