From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net-next-2.6] net: pskb_expand_head() optimization
Date: Sun, 12 Sep 2010 09:13:53 -0700 (PDT)
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BTW, Jarek, as to your idea to store a tail pointer in the shinfo, how
will you sync that tail pointer in all of the shinfo instances
referencing the frag list?

It simply can't work, we have to copy.