From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net-next] ipv6: avoid taking locks at socket dismantle
Date: Wed, 05 Dec 2012 16:26:20 -0500 (EST)
Message-ID: <20121205.162620.378864065213200277.davem@davemloft.net>
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From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Wed, 05 Dec 2012 11:18:10 -0800

> From: Eric Dumazet <edumazet@google.com>
> 
> ipv6_sock_mc_close() is called for ipv6 sockets at close time, and most
> of them don't use multicast.
> 
> Add a test to avoid contention on a shared spinlock.
> 
> Same heuristic applies for ipv6_sock_ac_close(), to avoid contention
> on a shared rwlock.
> 
> Signed-off-by: Eric Dumazet <edumazet@google.com>

Applied.