xen-netfront: convert to GRO API

Anirban was seeing netfront received MTU size packets, which downgraded throughput. The following patch makes netfront use GRO API which improves throughput for that case. Signed-off-by: Wei Liu <[email protected]> Cc: Anirban Chakraborty <[email protected]> Cc: Ian Campbell <[email protected]> Acked-by: Konrad Wilk <[email protected]> Acked-by: Ian Campbell <[email protected]> Signed-off-by: David S. Miller <[email protected]>
ambv · Oct 2, 2013 · 99d3d58 · 99d3d58
1 parent ee002b6
commit 99d3d58
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
@@ -952,7 +952,7 @@ static int handle_incoming_queue(struct net_device *dev,
 		u64_stats_update_end(&stats->syncp);
 
 		/* Pass it up. */
-		netif_receive_skb(skb);
+		napi_gro_receive(&np->napi, skb);
 	}
 
 	return packets_dropped;
@@ -1051,6 +1051,8 @@ static int xennet_poll(struct napi_struct *napi, int budget)
 	if (work_done < budget) {
 		int more_to_do = 0;
 
+		napi_gro_flush(napi, false);
+
 		local_irq_save(flags);
 
 		RING_FINAL_CHECK_FOR_RESPONSES(&np->rx, more_to_do);