netdev - Re: [PATCH v3] net: af_packet: don't call tpacket_destruct

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Message-ID: <20100927053046.GA6296@ff.dom.local>
Date:	Mon, 27 Sep 2010 05:30:47 +0000
From:	Jarek Poplawski <jarkao2@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	xiaosuo@...il.com, eric.dumazet@...il.com, socketcan@...tkopp.net,
	mst@...hat.com, netdev@...r.kernel.org
Subject: Re: [PATCH v3] net: af_packet: don't call tpacket_destruct_skb()
	until the skb is sent out

On Sun, Sep 26, 2010 at 06:22:08PM -0700, David Miller wrote:
> From: Jarek Poplawski <jarkao2@...il.com>
> Date: Fri, 24 Sep 2010 06:36:23 +0000
> 
> > af_packet could check some flag which guarantees the queued dev can do
> > skb_orphan after the real xmit and copy buffers otherwise.
> 
> Jarek, we pre-orphan SKBs in the core way before device even gets
> the packet.

I'm not sure which place in the core do you mean; skb_orphan_try() in
dev_hard_start_xmit() depends on ->tx_flags.

Jarek P.
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