[Xen-devel] [PATCH net-next] xen-netfront: convert to GRO API

[Wei Liu <wei.liu2@xxxxxxxxxx>]

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 <wei.liu2@xxxxxxxxxx>
Cc: Anirban Chakraborty <abchak@xxxxxxxxxxx>
Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
Acked-by: Konrad Wilk <konrad.wilk@xxxxxxxxxx>
---
 drivers/net/xen-netfront.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index 36808bf..dd1011e 100644
--- 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 @@ err:
        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);
-- 
1.7.10.4


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel