netdev - Re: [PATCH net-next] ipv4: __mkroute

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Message-Id: <20100930.211642.135520056.davem@davemloft.net>
Date:	Thu, 30 Sep 2010 21:16:42 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next] ipv4: __mkroute_output() speedup

From: Eric Dumazet <eric.dumazet@...il.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@...il.com>

Applied.
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