Re: [PATCH 1/2] ixgbe: vector rx rearm after queue reset

[Thomas Monjalon <thomas.monjalon@6wind.com>]

2015-06-25 11:25, Eric Kinzie:
> zero values in ixgbe_reset_rx_queue() used by vector receive so that
> rearming the rx queue happens at the right time.  Not doing so can in
> some cases result in the software inadvertently setting the card's rx
> tail pointer equal to the head pointer, which indicates that there are
> no descriptors available.  This causes receive to stop indefinitely
> on that queue.
> 
> Fixes: 01fa1d6215fa ("ixgbe: unify Rx setup")
> 
> Signed-off-by: Eric Kinzie <ehkinzie@gmail.com>
[...]
> --- a/drivers/net/ixgbe/ixgbe_rxtx.c
> +++ b/drivers/net/ixgbe/ixgbe_rxtx.c
> @@ -2261,6 +2261,10 @@ ixgbe_reset_rx_queue(struct ixgbe_adapter *adapter, struct ixgbe_rx_queue *rxq)
>  	rxq->nb_rx_hold = 0;
>  	rxq->pkt_first_seg = NULL;
>  	rxq->pkt_last_seg = NULL;
> +#ifdef RTE_IXGBE_INC_VECTOR
> +	rxq->rxrearm_nb = 0;
> +	rxq->rxrearm_start = 0;
> +#endif

A similar patch has been applied:
	http://dpdk.org/browse/dpdk/commit/?id=48e967695ba78
Thanks