Network performance with small packets

Commit Message

Sridhar Samudrala Feb. 1, 2011, 1:30 a.m. UTC

None

Patch

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 9b3ca10..5f9fae9 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -197,7 +197,7 @@  static void handle_tx(struct vhost_net *net)
 		if (err != len)
 			pr_debug("Truncated TX packet: "
 				 " len %d != %zd\n", err, len);
-		vhost_add_used_and_signal(&net->dev, vq, head, 0);
+		vhost_add_used(vq, head, 0);
 		total_len += len;
 		if (unlikely(total_len >= VHOST_NET_WEIGHT)) {
 			vhost_poll_queue(&vq->poll);
@@ -205,6 +205,8 @@  static void handle_tx(struct vhost_net *net)
 		}
 	}
 
+	if (total_len > 0)
+		vhost_signal(&net->dev, vq);
 	mutex_unlock(&vq->mutex);
 }