From 6c43ff18f91e54aa7555d8ae4f26eab7da5bce68 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Thu, 26 Oct 2006 15:46:53 -0700 Subject: [PATCH] netpoll deferred transmit path When the netpoll beast got busy, he tended to babble. Instead of talking out of his large mouth as normal, he tended to try to snort out other orifices. This lead to words (skbs) ending up in odd places (like NIT) that he did not intend. The normal way of talking wouldn't work, but he could at least change to using the same tone all the time. Signed-off-by: Stephen Hemminger --- net/core/netpoll.c | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/net/core/netpoll.c b/net/core/netpoll.c index 621baa5da4..93cb828f3a 100644 --- a/net/core/netpoll.c +++ b/net/core/netpoll.c @@ -55,9 +55,25 @@ static void queue_process(void *p) struct netpoll_info *npinfo = p; struct sk_buff *skb; - while ((skb = skb_dequeue(&npinfo->txq))) - dev_queue_xmit(skb); + while ((skb = skb_dequeue(&npinfo->txq))) { + struct net_device *dev = skb->dev; + if (!netif_device_present(dev) || !netif_running(dev)) { + __kfree_skb(skb); + continue; + } + + netif_tx_lock_bh(dev); + if (netif_queue_stopped(dev) || + dev->hard_start_xmit(skb, dev) != NETDEV_TX_OK) { + skb_queue_head(&npinfo->txq, skb); + netif_tx_unlock_bh(dev); + + schedule_delayed_work(&npinfo->tx_work, HZ/10); + return; + } + netif_tx_unlock_bh(dev); + } } void netpoll_queue(struct sk_buff *skb) @@ -765,6 +781,7 @@ void netpoll_cleanup(struct netpoll *np) if (atomic_dec_and_test(&npinfo->refcnt)) { skb_queue_purge(&npinfo->arp_tx); skb_queue_purge(&npinfo->txq); + cancel_rearming_delayed_work(&npinfo->tx_work); flush_scheduled_work(); kfree(npinfo); -- 2.39.5