>Now, we could eliminate the memory allocation part by doing the m_extract()
>thing suggested by Matt Thomas previously (during the m_pulldown() discussion),
>and by passing a "struct ip_info" around.

	IIRC, m_extract always copied the packet data and m_pulldown does not.
	I can extend m_pulldown to take care of alignment if necessary.
	I need to hunt a remaining bug (somewhere in IPsec operation on
	loopback interface, false assumption made about m_len) then I'll be
	able to enable m_pulldown in the tree.

itojun