netdev - Re: [PATCH net-next-2.6] udp: use atomic_inc_not_zero

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Message-Id: <20101116.113519.245394130.davem@davemloft.net>
Date:	Tue, 16 Nov 2010 11:35:19 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next-2.6] udp: use atomic_inc_not_zero_hint

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Tue, 16 Nov 2010 06:58:26 +0100

> UDP sockets refcount is usually 2, unless an incoming frame is going to
> be queued in receive or backlog queue.
> 
> Using atomic_inc_not_zero_hint() permits to reduce latency, because
> processor issues less memory transactions.
> 
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Applied.
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