netdev - Re: [PATCH 1/4 net-next] net: allow skb->head to be a page fragment

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Date:	Mon, 30 Apr 2012 21:48:07 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org, ilpo.jarvinen@...sinki.fi,
	ncardwell@...gle.com, therbert@...gle.com, maze@...gle.com,
	jeffrey.t.kirsher@...el.com, bhutchings@...arflare.com,
	mcarlson@...adcom.com, mchan@...adcom.com,
	herbert@...dor.hengli.com.au
Subject: Re: [PATCH 1/4 net-next] net: allow skb->head to be a page fragment

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Fri, 27 Apr 2012 12:33:38 +0200

> From: Eric Dumazet <edumazet@...gle.com>
> 
> skb->head is currently allocated from kmalloc(). This is convenient but
> has the drawback the data cannot be converted to a page fragment if
> needed.
 ...
> Given all these issues, the following patch introduces the possibility
> of having skb->head be a fragment in itself. We use a new skb flag,
> skb->head_frag to carry this information.
 ...
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Applied.
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