netdev - Re: [PATCH net-next-2.6] filter: use reciprocal divide

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Message-ID: <AANLkTi=qR==8g2Z_GeAOsczVmUS3yj1PnsOfoU7zbudG@mail.gmail.com>
Date:	Fri, 19 Nov 2010 16:18:05 +0800
From:	Changli Gao <xiaosuo@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Hagen Paul Pfeifer <hagen@...u.net>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next-2.6] filter: use reciprocal divide

On Fri, Nov 19, 2010 at 4:04 PM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> At compile time, we can replace the DIV_K instruction (divide by a
> constant value) by a reciprocal divide.
>
> At exec time, the expensive divide is replaced by a multiply, a less
> expensive operation on most processors.
>
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Acked-by: Changli Gao <xiaosuo@...il.com>


-- 
Regards,
Changli Gao(xiaosuo@...il.com)
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