netdev - Re: linear sk

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Date:	Wed, 5 May 2010 21:32:36 +0200
From:	Phil Sutter <phil@....cc>
To:	netdev@...r.kernel.org
Subject: Re: linear sk_buff

Hi,

On Wed, May 05, 2010 at 10:12:06PM +0300, Mark Ryden wrote:
>  I would appreciate if someone in this mailing list  can say in a
> sentence or two what is a linear
> sk_buff and what is a non linear sk_buff; does it has to do with fragmentation?
> (I am sure that many know the answer, but I am confused and googling
> made me overconfused)

As far as I can tell, linear and non-linear sk_buffs differ in how the
data they contain is kept internally. Linear sk_buffs are trivial, it's
data resides in one, continuous block. In non-linear sk_buffs, data is
spread across multiple junks, organised in a data structure comparable
to e.g. scatterlists.

For further information, I'd highly recommend David Miller's "how SKBs
work": http://vger.kernel.org/~davem/skb.html .

Greetings, Phil
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