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

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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>
This commit is contained in:
Krishna Kumar 2009-12-09 20:59:58 +00:00 committed by David S. Miller
parent def87cf420
commit 068a2de57d
1 changed files with 8 additions and 0 deletions
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8
net/core/dev.c
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@ -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)