netdev - Re: [PATCH net-next v2] packet: tx timestamping on tpacket ring

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Message-ID: <51751018.2010305@redhat.com>
Date:	Mon, 22 Apr 2013 12:25:28 +0200
From:	Daniel Borkmann <dborkman@...hat.com>
To:	Paul Chavent <Paul.Chavent@...ra.fr>
CC:	Willem de Bruijn <willemb@...gle.com>, netdev@...r.kernel.org,
	David Miller <davem@...emloft.net>,
	Richard Cochran <richardcochran@...il.com>
Subject: Re: [PATCH net-next v2] packet: tx timestamping on tpacket ring

On 04/22/2013 10:19 AM, Paul Chavent wrote:
> On 04/21/2013 06:42 PM, Willem de Bruijn wrote:
>> Tx has the advantage that time sources can be chosen
>> per socket independent of all other sockets
>
> Sorry if my question is trivial.
> I understand that when we require rx timestamping, we need to ask to the device to timestamp all incoming packets since we don't know the path of the packet in advance.
> For tx timestamping, you seems to say that the request to timestamp the packet is contained in the skbuff and is done on a per packet basis ?

It's all in: Documentation/networking/timestamping.txt
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