net: release skb->dst in sock_queue_rcv_skb()

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When queuing a skb to sk->sk_receive_queue, we can release its dst,
not anymore needed.  Since current cpu did the dst_hold(), refcount is
probably still hot int this cpu caches.

This avoids readers to access the original dst to decrement its
refcount, possibly a long time after packet reception. This should
speedup UDP and RAW receive path.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Eric Dumazet 2008-11-26 01:08:18 -08:00 • committed by David S. Miller

parent dd24c00191

commit 7035560287

1 changed files with 5 additions and 1 deletions

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net/core/sock.c

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