diff options
Diffstat (limited to 'drivers/net/xen-netback/netback.c')
| -rw-r--r-- | drivers/net/xen-netback/netback.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c index 58effc49f52..8518a0d1f6f 100644 --- a/drivers/net/xen-netback/netback.c +++ b/drivers/net/xen-netback/netback.c @@ -55,6 +55,13 @@ bool separate_tx_rx_irq = 1; module_param(separate_tx_rx_irq, bool, 0644); +/* When guest ring is filled up, qdisc queues the packets for us, but we have + * to timeout them, otherwise other guests' packets can get stucked there + */ +unsigned int rx_drain_timeout_msecs = 10000; +module_param(rx_drain_timeout_msecs, uint, 0444); +unsigned int rx_drain_timeout_jiffies; + /* * This is the maximum slots a skb can have. If a guest sends a skb * which exceeds this limit it is considered malicious. @@ -1694,8 +1701,9 @@ void xenvif_idx_unmap(struct xenvif *vif, u16 pending_idx) static inline int rx_work_todo(struct xenvif *vif) { - return !skb_queue_empty(&vif->rx_queue) && - xenvif_rx_ring_slots_available(vif, vif->rx_last_skb_slots); + return (!skb_queue_empty(&vif->rx_queue) && + xenvif_rx_ring_slots_available(vif, vif->rx_last_skb_slots)) || + vif->rx_queue_purge; } static inline int tx_work_todo(struct xenvif *vif) @@ -1782,12 +1790,19 @@ int xenvif_kthread_guest_rx(void *data) if (kthread_should_stop()) break; + if (vif->rx_queue_purge) { + skb_queue_purge(&vif->rx_queue); + vif->rx_queue_purge = false; + } + if (!skb_queue_empty(&vif->rx_queue)) xenvif_rx_action(vif); if (skb_queue_empty(&vif->rx_queue) && - netif_queue_stopped(vif->dev)) + netif_queue_stopped(vif->dev)) { + del_timer_sync(&vif->wake_queue); xenvif_start_queue(vif); + } cond_resched(); } @@ -1838,6 +1853,8 @@ static int __init netback_init(void) if (rc) goto failed_init; + rx_drain_timeout_jiffies = msecs_to_jiffies(rx_drain_timeout_msecs); + return 0; failed_init: |