netdev - Re: [PATCH 1/2] tun: reserves space for network in skb

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Date:	Thu, 9 Jun 2011 07:16:51 -0700 (PDT)
From:	Stephen Hemminger <stephen.hemminger@...tta.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH 1/2] tun: reserves space for network in skb


> From: Stephen Hemminger <shemminger@...tta.com>
> Date: Wed, 08 Jun 2011 17:33:07 -0700
> 
> > The tun driver allocates skb's to hold data from user and then
> > passes the data into the network stack as received data. Most
> > network devices
> > allocate the receive skb with routines like dev_alloc_skb() that
> > reserves additional space for use by network protocol stack but tun
> > does not.
> >
> > Because of the lack of padding, when the packet is passed through
> > bridge netfilter a new skb has to be allocated.
> >
> > Signed-off-by: Stephen Hemminger <shemminger@...tta.com>
> 
> Netconf must be coming up soon, Stephen Hemminger is submitting
> patches again :-)

12 hours on plane + 8 hours in airports tend to get the
trivial patch backlog moving again. 
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