From: Eric Dumazet <dada1@cosmosbay.com>
Date: Wed, 26 Nov 2008 09:08:18 +0000 (-0800)
Subject: net: release skb->dst in sock_queue_rcv_skb()
X-Git-Tag: v2.6.29-rc1~581^2~386
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=70355602879229c6f8bd694ec9c0814222bc4936;p=pandora-kernel.git

net: release skb->dst in sock_queue_rcv_skb()

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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