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Commit 7a66f784 authored by Michael S. Tsirkin's avatar Michael S. Tsirkin Committed by Rusty Russell
Browse files

virtio_net: delay TX callbacks 



Ask for delayed callbacks on TX ring full, to give the
other side more of a chance to make progress.

Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent 7ab358c2

drivers/net/virtio_net.c

+1 −1
Original line number Diff line number Diff line
@@ -609,7 +609,7 @@ static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev) 
	 * before it gets out of hand.  Naturally, this wastes entries. */

	if (capacity < 2+MAX_SKB_FRAGS) {

		netif_stop_queue(dev);

		if (unlikely(!virtqueue_enable_cb(vi->svq))) {

		if (unlikely(!virtqueue_enable_cb_delayed(vi->svq))) {

			/* More just got used, free them then recheck. */

			capacity += free_old_xmit_skbs(vi);

			if (capacity >= 2+MAX_SKB_FRAGS) {