netdev - Re: [PATCH 0/3] net: time stamping fixes

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Message-ID: <20111019142548.GA15253@netboy.at.omicron.at>
Date:	Wed, 19 Oct 2011 16:25:48 +0200
From:	Richard Cochran <richardcochran@...il.com>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH 0/3] net: time stamping fixes

On Wed, Oct 19, 2011 at 03:32:53PM +0200, Johannes Berg wrote:
> 
> OTOH, could skb_clone_tx_timestamp() orphan the original skb after
> adding the skb2?

The Ethernet MAC driver decides what to do with the original skb. In
the MAC driver, it goes like:

1. skb_tx_timestamp(skb) -> skb_clone_tx_timestamp(skb);
2. give skb to hardware;
3. ...
4. kfree_skb, recycle, etc

Richard

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