netdev - Re: [PATCH net-next] tcp: timestamp SYN+DATA messages

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Message-ID: <CADVnQy=ah3JAeTbsqOf_-T-45UdjXMHV1=r=GLiELThH1qS-uQ@mail.gmail.com>
Date:	Mon, 10 Mar 2014 12:22:49 -0400
From:	Neal Cardwell <ncardwell@...gle.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Yuchung Cheng <ycheng@...gle.com>
Subject: Re: [PATCH net-next] tcp: timestamp SYN+DATA messages

On Sun, Mar 9, 2014 at 8:36 PM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> From: Eric Dumazet <edumazet@...gle.com>
>
> All skb in socket write queue should be properly timestamped.
>
> In case of FastOpen, we special case the SYN+DATA 'message' as we
> queue in socket wrote queue the two fallback skbs:
>
> 1) SYN message by itself.
> 2) DATA segment by itself.
>
> We should make sure these skbs have proper timestamps.
>
> Add a WARN_ON_ONCE() to eventually catch future violations.
>
> Fixes: 740b0f1841f6 ("tcp: switch rtt estimations to usec resolution")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Cc: Neal Cardwell <ncardwell@...gle.com>
> Cc: Yuchung Cheng <ycheng@...gle.com>

Acked-by: Neal Cardwell <ncardwell@...gle.com>

neal
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