Re: [PATCH v1] ixgbe: remove vector pmd burst size restriction

[Zoltan Kiss <zoltan.kiss@linaro.org>]

On 31/07/15 12:57, Zoltan Kiss wrote:
>>
>> Another thing, that I just thought about:
>> Right now we invoke ixgbe_rxq_rearm() only at the start of
>> _recv_raw_pkts_vec().
>> Before it was ok, as _recv_raw_pkts_vec() would never try to read more
>> then 32 RXDs.
>> But what would happen if nb_pkts > rxq->nb_desc and rxq->rxrearm_nb == 0?
> Yes, that call would deplete the RX ring, the card wouldn't be able to
> receive more, so the receive function wouldn't be called again to rearm
> the ring.
>
Actually not, the problem is that the recv function would probably 
overran the the descriptor ring. But anyway, we should limit nb_pkts indeed.