Subject: Re: m_copy - doesn't copy if M_EXT is set.
To: Dennis Ferguson <>
From: Ignatios Souvatzis <>
List: tech-net
Date: 10/05/1999 10:46:13
On Mon, Oct 04, 1999 at 03:03:37PM -0700, Dennis Ferguson wrote:
> This is also the reason why m_pullup() always copies the header out of a
> cluster even if the header was originally contiguous in the cluster.

Hm. This should be documented.

And we should have a M_REALPULLUP macro that does no copy unless necessary.
But I guess this should wait until Itojun specifies what he needs to make
IPv6 work with mbuf chains.


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