Patrick McHardy wrote:
> Waskiewicz Jr, Peter P wrote:
> 
>>Thought about this more last night and this morning.  As far as I can
>>tell, I still need this.  If the qdisc gets loaded with multiqueue
>>turned on, I can just use the value of band to assign
>>skb->queue_mapping.  But if the qdisc is loaded without multiqueue
>>support, then I need to assign a value of zero to queue_mapping, or not
>>assign it at all (it will be zero'd out before the call to ->enqueue()
>>in dev_queue_xmit()).  But I'd rather not have a conditional in the
>>hotpath checking if the qdisc is multiqueue; I'd rather have the array
>>to match the bands so I can just do an assignment.
>>
>>What do you think?
> 
> 
> 
> I very much doubt that it has any measurable impact. You can
> also add a small inline function
> 
> void skb_set_queue_mapping(struct sk_buff *skb, unsigned int queue)


OK I didn't really listen obviously :) A compile time option
won't help. Just remove it and assign it conditionally.
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