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authorDavid S. Miller <davem@davemloft.net>2010-07-08 02:59:38 +0400
committerDavid S. Miller <davem@davemloft.net>2010-07-08 02:59:38 +0400
commit597e608a8492d662736c9bc6aa507dbf1cadc17d (patch)
tree6c330cdd0a4809f67dd191b37e34f5b4318cef78 /net/core/dev.c
parentacbc0f039ff4b93da737c91937b7c70018ded39f (diff)
parent33b665eeeb85956ccbdf31c4c31a4e2a31133c44 (diff)
downloadlinux-597e608a8492d662736c9bc6aa507dbf1cadc17d.tar.xz
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Diffstat (limited to 'net/core/dev.c')
-rw-r--r--net/core/dev.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 92482d7a87a9..eb4201cf9c8c 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1550,6 +1550,24 @@ static void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
rcu_read_unlock();
}
+/*
+ * Routine to help set real_num_tx_queues. To avoid skbs mapped to queues
+ * greater then real_num_tx_queues stale skbs on the qdisc must be flushed.
+ */
+void netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq)
+{
+ unsigned int real_num = dev->real_num_tx_queues;
+
+ if (unlikely(txq > dev->num_tx_queues))
+ ;
+ else if (txq > real_num)
+ dev->real_num_tx_queues = txq;
+ else if (txq < real_num) {
+ dev->real_num_tx_queues = txq;
+ qdisc_reset_all_tx_gt(dev, txq);
+ }
+}
+EXPORT_SYMBOL(netif_set_real_num_tx_queues);
static inline void __netif_reschedule(struct Qdisc *q)
{