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2013 Jul 02
3
[PATCH RFC] xen-netback: remove guest RX path dependence on MAX_SKB_FRAGS
...44 --- a/drivers/net/xen-netback/interface.c +++ b/drivers/net/xen-netback/interface.c @@ -96,18 +96,24 @@ static irqreturn_t xenvif_interrupt(int irq, void *dev_id) static int xenvif_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct xenvif *vif = netdev_priv(dev); + unsigned int ring_slots_required; BUG_ON(skb->dev != dev); if (vif->netbk == NULL) goto drop; + ring_slots_required = xen_netbk_count_skb_slots(vif, skb); + + /* Reserve ring slots for the worst-case number of fragments. */ + vif->rx_req_cons_peek += ring_slots_required; + /* Drop the packet if the target...