netdev - Re: [PATCH v2 net-next 1/4] tcp: consolidate SYNACK RTT sampling

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Date:	Tue, 23 Jul 2013 08:54:35 -0700
From:	Yuchung Cheng <ycheng@...gle.com>
To:	David Miller <davem@...emloft.net>
Cc:	Neal Cardwell <ncardwell@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Nandita Dukkipati <nanditad@...gle.com>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH v2 net-next 1/4] tcp: consolidate SYNACK RTT sampling

On Mon, Jul 22, 2013 at 6:02 PM, David Miller <davem@...emloft.net> wrote:
> From: Yuchung Cheng <ycheng@...gle.com>
> Date: Mon, 22 Jul 2013 16:20:45 -0700
>
>> This patch series improve RTT sampling in three ways:
>> 1. Sample RTT during fast recovery and reordering events.
>> 2. Favor ack-based RTT to timestamps because of broken TS ECR fields
>> 3. Consolidate the RTT measurement logic.
>>
>> The first patch consolidates SYNACK and other RTT measurement to use a
>> central function tcp_ack_update_rtt(). A (small) bonus is now SYNACK
>> RTT measurement happens after PAWS check, potentially reducing the
>> impact of RTO seeding on bad TCP timestamps values.
>>
>> Signed-off-by: Yuchung Cheng <ycheng@...gle.com>
>
> I like this series a lot, applied, thanks!
>
> Next time please submit a seperate "[PATCH 0/4] xxx" posting.
>
> If it has non-trivial content, I use the "0" posting as the
> commit message of a merge commit when I apply your series.
>
> What I did here was take the text:
>
> ====================
> This patch series improve RTT sampling in three ways:
> 1. Sample RTT during fast recovery and reordering events.
> 2. Favor ack-based RTT to timestamps because of broken TS ECR fields
> 3. Consolidate the RTT measurement logic.
> ====================
>
> and place it into that merge commit, removing it from the patch #1
> commit message.
Thank you David. Sorry for the extra hassle. Will definitely do that
for next patch series.

>
> Thanks.
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