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authorKrishna Kumar <krkumar2@in.ibm.com>2009-12-09 20:59:58 +0000
committerDavid S. Miller <davem@davemloft.net>2009-12-23 14:13:30 -0800
commit068a2de57ddf4f472e32e7af868613c574ad1d88 (patch)
tree61a54d80679733dde74fbcbe851a5760e20be106 /net/core
parentdef87cf42069a6d4fd42a2ede8f19c620a292568 (diff)
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>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/dev.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index be9924f60ec..a8d68cdedbb 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1853,6 +1853,14 @@ gso:
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)