Re: [dpdk-dev] [PATCH] Revert "bonding: use existing enslaved device queues"

[Eric Kinzie <ehkinzie@gmail.com>]

On Wed Sep 07 15:28:10 +0300 2016, Ilya Maximets wrote:
> This reverts commit 5b7bb2bda5519b7800f814df64d4e015282140e5.
> 
> It is necessary to reconfigure all queues every time because configuration
> can be changed.
> 
> For example, if we're reconfiguring bonding device with new memory pool,
> already configured queues will still use the old one. And if the old
> mempool be freed, application likely will panic in attempt to use
> freed mempool.
> 
> This happens when we use the bonding device with OVS 2.6 while MTU
> reconfiguration:
> 
> PANIC in rte_mempool_get_ops():
> assert "(ops_index >= 0) && (ops_index < RTE_MEMPOOL_MAX_OPS_IDX)" failed
> 
> Cc: <stable@dpdk.org>
> Signed-off-by: Ilya Maximets <i.maximets@samsung.com>
> ---
>  drivers/net/bonding/rte_eth_bond_pmd.c | 10 ++--------
>  1 file changed, 2 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
> index b20a272..eb5b6d1 100644
> --- a/drivers/net/bonding/rte_eth_bond_pmd.c
> +++ b/drivers/net/bonding/rte_eth_bond_pmd.c
> @@ -1305,8 +1305,6 @@ slave_configure(struct rte_eth_dev *bonded_eth_dev,
>  	struct bond_rx_queue *bd_rx_q;
>  	struct bond_tx_queue *bd_tx_q;
>  
> -	uint16_t old_nb_tx_queues = slave_eth_dev->data->nb_tx_queues;
> -	uint16_t old_nb_rx_queues = slave_eth_dev->data->nb_rx_queues;
>  	int errval;
>  	uint16_t q_id;
>  
> @@ -1347,9 +1345,7 @@ slave_configure(struct rte_eth_dev *bonded_eth_dev,
>  	}
>  
>  	/* Setup Rx Queues */
> -	/* Use existing queues, if any */
> -	for (q_id = old_nb_rx_queues;
> -	     q_id < bonded_eth_dev->data->nb_rx_queues; q_id++) {
> +	for (q_id = 0; q_id < bonded_eth_dev->data->nb_rx_queues; q_id++) {
>  		bd_rx_q = (struct bond_rx_queue *)bonded_eth_dev->data->rx_queues[q_id];
>  
>  		errval = rte_eth_rx_queue_setup(slave_eth_dev->data->port_id, q_id,
> @@ -1365,9 +1361,7 @@ slave_configure(struct rte_eth_dev *bonded_eth_dev,
>  	}
>  
>  	/* Setup Tx Queues */
> -	/* Use existing queues, if any */
> -	for (q_id = old_nb_tx_queues;
> -	     q_id < bonded_eth_dev->data->nb_tx_queues; q_id++) {
> +	for (q_id = 0; q_id < bonded_eth_dev->data->nb_tx_queues; q_id++) {
>  		bd_tx_q = (struct bond_tx_queue *)bonded_eth_dev->data->tx_queues[q_id];
>  
>  		errval = rte_eth_tx_queue_setup(slave_eth_dev->data->port_id, q_id,
> -- 
> 2.7.4
> 

NAK

There are still some users of this code.  Let's give them a chance to
comment before removing it.


Thanks,

Eric