netdev - Re: [PATCH net-next] net: sched: use no more than one page in struct fw

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Message-ID: <1395070403.9668.51.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Mon, 17 Mar 2014 08:33:23 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Thomas Graf <tgraf@...g.ch>
Cc:	David Laight <David.Laight@...LAB.COM>,
	David Miller <davem@...emloft.net>,
	John Fastabend <john.fastabend@...il.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] net: sched: use no more than one page in
 struct fw_head

On Mon, 2014-03-17 at 15:30 +0000, Thomas Graf wrote:

> So why do we have reciprocal_divide()?

Thats when you do not have a constant divisor ;)

Gcc uses a reciprocal divide if the divisor is known/constant.

If not, it _has_ to use a real divide.


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