From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net-next] ipv4: __mkroute_output() speedup
Date: Thu, 30 Sep 2010 21:16:42 -0700 (PDT)
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From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Wed, 29 Sep 2010 23:53:50 +0200

> While doing stress tests with a disabled IP route cache, I found
> __mkroute_output() was touching three times in_device atomic refcount.
> 
> Use RCU to touch it once to reduce cache line ping pongs.
 ...
> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>

Applied.