netdev - Re: [PATCH net-next] r8169: Support for byte queue limits

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Date:	Fri, 02 Dec 2011 15:29:51 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	igorm@....rs
Cc:	netdev@...r.kernel.org, davem@...emloft.net,
	Realtek linux nic maintainers <nic_swsd@...ltek.com>,
	Francois Romieu <romieu@...zoreil.com>
Subject: Re: [PATCH net-next] r8169: Support for byte queue limits

Le vendredi 02 décembre 2011 à 14:09 +0100, igorm@....rs a écrit :
> From: Igor Maravic <igorm@....rs>
> 
> Changes to r8169 to use byte queue limits.
> 
> Signed-off-by: Igor Maravic <igorm@....rs>
> ---
>  drivers/net/ethernet/realtek/r8169.c |   12 ++++++++++--
>  1 files changed, 10 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
> index e5a6d8e..7ea428c 100644
> --- a/drivers/net/ethernet/realtek/r8169.c
> +++ b/drivers/net/ethernet/realtek/r8169.c
> @@ -3773,6 +3773,7 @@ static void rtl_init_rxcfg(struct rtl8169_private *tp)
>  static void rtl8169_init_ring_indexes(struct rtl8169_private *tp)
>  {
>  	tp->dirty_tx = tp->dirty_rx = tp->cur_tx = tp->cur_rx = 0;
> +	netdev_reset_queue(tp->dev);


Hmm... What about rtl8169_tx_clear_range() or rtl8169_tx_clear() ?

Also please CC maintainers of this driver to your submission.

(I did this)

>  }
>  
>  static void rtl_hw_jumbo_enable(struct rtl8169_private *tp)
> @@ -5458,6 +5459,7 @@ static int rtl8169_xmit_frags(struct rtl8169_private *tp, struct sk_buff *skb,
>  		tp->tx_skb[entry].skb = skb;
>  		txd->opts1 |= cpu_to_le32(LastFrag);
>  	}
> +	netdev_sent_queue(tp->dev, skb->len);
>  
>  	return cur_frag;
>  
> @@ -5623,6 +5625,8 @@ static void rtl8169_tx_interrupt(struct net_device *dev,
>  				 void __iomem *ioaddr)
>  {
>  	unsigned int dirty_tx, tx_left;
> +	unsigned int bytes_compl = 0;
> +	int tx_compl = 0;
>  
>  	dirty_tx = tp->dirty_tx;
>  	smp_rmb();
> @@ -5641,8 +5645,8 @@ static void rtl8169_tx_interrupt(struct net_device *dev,
>  		rtl8169_unmap_tx_skb(&tp->pci_dev->dev, tx_skb,
>  				     tp->TxDescArray + entry);
>  		if (status & LastFrag) {
> -			dev->stats.tx_packets++;
> -			dev->stats.tx_bytes += tx_skb->skb->len;
> +			bytes_compl += tx_skb->skb->len;
> +			tx_compl++;
>  			dev_kfree_skb(tx_skb->skb);
>  			tx_skb->skb = NULL;
>  		}
> @@ -5650,6 +5654,10 @@ static void rtl8169_tx_interrupt(struct net_device *dev,
>  		tx_left--;
>  	}
>  
> +	dev->stats.tx_packets += tx_compl;
> +	dev->stats.tx_bytes += bytes_compl;
> +	netdev_completed_queue(dev, tx_compl, bytes_compl);
> +
>  	if (tp->dirty_tx != dirty_tx) {
>  		tp->dirty_tx = dirty_tx;
>  		smp_wmb();


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