netdev - Re: [PATCH net-next] net: avoid one atomic operation in skb

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Message-Id: <20141001.212748.2188434550553073923.davem@davemloft.net>
Date:	Wed, 01 Oct 2014 21:27:48 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next] net: avoid one atomic operation in skb_clone()

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Wed, 01 Oct 2014 15:27:15 -0700

> From: Eric Dumazet <edumazet@...gle.com>
> 
> Fast clone cloning can actually avoid an atomic_inc(), if we
> guarantee prior clone_ref value is 1.
> 
> This requires a change kfree_skbmem(), to perform the 
> atomic_dec_and_test() on clone_ref before setting fclone to
> SKB_FCLONE_UNAVAILABLE.
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Applied, thanks Eric.
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