Commit 068a2de5 authored Dec 09, 2009 by Krishna Kumar Committed by David S. Miller Dec 23, 2009

net: release dst entry while cache-hot for GSO case too



Non-GSO code drops dst entry for performance reasons, but
the same is missing for GSO code. Drop dst while cache-hot
for GSO case too.

Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent def87cf4

net/core/dev.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -1853,6 +1853,14 @@ int dev_hard_start_xmit(struct sk_buff skb, struct net_device dev,

		skb->next = nskb->next;
		nskb->next = NULL;

		/*
		* If device doesnt need nskb->dst, release it right now while
		* its hot in this cpu cache
		*/
		if (dev->priv_flags & IFF_XMIT_DST_RELEASE)
		skb_dst_drop(nskb);

		rc = ops->ndo_start_xmit(nskb, dev);
		if (unlikely(rc != NETDEV_TX_OK)) {
		if (rc & ~NETDEV_TX_MASK)