Commit c63c615e authored by Sieng Piaw Liew's avatar Sieng Piaw Liew Committed by David S. Miller
Browse files

bcm63xx_enet: switch to napi_build_skb() to reuse skbuff_heads 



napi_build_skb() reuses NAPI skbuff_head cache in order to save some
cycles on freeing/allocating skbuff_heads on every new Rx or completed
Tx.
Use napi_consume_skb() to feed the cache with skbuff_heads of completed
Tx so it's never empty.

Signed-off-by: default avatarSieng Piaw Liew <liew.s.piaw@gmail.com>
Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 49ae83fc

drivers/net/ethernet/broadcom/bcm63xx_enet.c

+2 −2
Original line number Diff line number Diff line
@@ -388,7 +388,7 @@ static int bcm_enet_receive_queue(struct net_device *dev, int budget) 
					 priv->rx_buf_size, DMA_FROM_DEVICE);

			priv->rx_buf[desc_idx] = NULL;



			skb = build_skb(buf, priv->rx_frag_size);

			skb = napi_build_skb(buf, priv->rx_frag_size);

			if (unlikely(!skb)) {

				skb_free_frag(buf);

				dev->stats.rx_dropped++;
@@ -468,7 +468,7 @@ static int bcm_enet_tx_reclaim(struct net_device *dev, int force) 
			dev->stats.tx_errors++;



		bytes += skb->len;

		dev_kfree_skb(skb);

		napi_consume_skb(skb, !force);

		released++;

	}