netdev - Re: SKB paged fragment lifecycle on receive

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Message-ID: <4E04EF8F.6070900@goop.org>
Date:	Fri, 24 Jun 2011 13:11:59 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	David Miller <davem@...emloft.net>
CC:	eric.dumazet@...il.com, Ian.Campbell@...rix.com,
	netdev@...r.kernel.org, xen-devel@...ts.xensource.com,
	rusty@...tcorp.com.au
Subject: Re: SKB paged fragment lifecycle on receive

On 06/24/2011 12:46 PM, David Miller wrote:
> Pages get transferred between different SKBs all the time.
>
> For example, GRO makes extensive use of this technique.
> See net/core/skbuff.c:skb_gro_receive().
>
> It is just one example.

I see, and the new skb doesn't get a destructor copied from the
original, so there'd be no second callback.

Are the pages still attached to the first skb, or are they transferred
completely?

Thanks,
    J


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