[3/3] drivers/net/ixgbe/ixgbe_main.c: get tx queue mapping specified in socket

From: Fenghua Yu <fenghua.yu@intel.com>

Instead of using calculated tx queue mapping, this patch selects tx queue mapping
which is specified in socket.

By doing this, tx queue mapping can be bigger than the number of cores and
stressfully use multiqueue TSS. Or application can specify some of cores/queues
to send packets and implement flexible load balance policies.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Junchang Wang <junchangwang@gmail.com>
Signed-off-by: Xinan Tang <xinan.tang@intel.com>
---
 drivers/net/ixgbe/ixgbe_main.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

On 12/15/2010 12:02 PM, Yu, Fenghua wrote:
> From: Fenghua Yu <fenghua.yu@intel.com>
> 
> Instead of using calculated tx queue mapping, this patch selects tx queue mapping
> which is specified in socket.
> 
> By doing this, tx queue mapping can be bigger than the number of cores and
> stressfully use multiqueue TSS. Or application can specify some of cores/queues
> to send packets and implement flexible load balance policies.
> 
> Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
> Signed-off-by: Junchang Wang <junchangwang@gmail.com>
> Signed-off-by: Xinan Tang <xinan.tang@intel.com>
> ---
>  drivers/net/ixgbe/ixgbe_main.c |    9 ++++++++-
>  1 files changed, 8 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
> index eee0b29..4d98928 100644
> --- a/drivers/net/ixgbe/ixgbe_main.c
> +++ b/drivers/net/ixgbe/ixgbe_main.c
> @@ -6255,7 +6255,14 @@ static int ixgbe_maybe_stop_tx(struct net_device *netdev,
>  static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
>  {
>  	struct ixgbe_adapter *adapter = netdev_priv(dev);
> -	int txq = smp_processor_id();
> +	int txq;
> +
> +	txq = sk_tx_queue_get(skb->sk);
> +
> +	if (txq >= 0 && txq < dev->real_num_tx_queues)
> +		return txq;
> +
> +	txq = smp_processor_id();
>  #ifdef IXGBE_FCOE
>  	__be16 protocol;
>  

We are trying to remove stuff from select_queue not add it. I believe however you solve this problem should be generic and not specific to ixgbe.

Thanks,
John.
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