netdev - Re: [PATCH net-next] net/vxlan: Avoid unaligned access in vxlan_build

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Message-ID: <20160922213010.GA32052@oracle.com>
Date:   Thu, 22 Sep 2016 17:30:10 -0400
From:   Sowmini Varadhan <sowmini.varadhan@...cle.com>
To:     David Miller <davem@...emloft.net>
Cc:     jbenc@...hat.com, netdev@...r.kernel.org,
        hannes@...essinduktion.org, aduyck@...antis.com,
        daniel@...earbox.net, pabeni@...hat.com
Subject: Re: [PATCH net-next] net/vxlan: Avoid unaligned access in
 vxlan_build_skb()

On (09/22/16 01:52), David Miller wrote:
> Alternatively we can do Alexander Duyck's trick, by pushing
> the headers into the frag list, forcing a pull and realignment
> by the next protocol layer.

What is the "Alexander Duyck trick" (hints about module or commit id,
where this can be found, please)?

Is this basically about, e.g., putting the vxlanhdr in its own
skb_frag_t, or something else?

--Sowmini