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

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Message-Id: <20120428.052238.1177963256540298198.davem@davemloft.net>
Date:	Sat, 28 Apr 2012 05:22:38 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	alexander.duyck@...il.com
Cc:	eric.dumazet@...il.com, alexander.h.duyck@...el.com,
	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: Alexander Duyck <alexander.duyck@...il.com>
Date: Sat, 28 Apr 2012 01:27:24 -0700

> I was thinking there would be a bigger gain with a change like this
> but essentially all you are doing is making the packets more mergable
> resulting in you being able to drop the 256 bytes for the sk_buff in
> either GRO or when it gets queued for the socket.

He's also avoiding the SLUB slow path almost all of the time.
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