netdev - Re: [PATCH net-next] tcp: add earliest departure time to SCM_TIMESTAMPING_OPT

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Message-Id: <20200731.170056.2160921698138656684.davem@davemloft.net>
Date:   Fri, 31 Jul 2020 17:00:56 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     ysseung@...gle.com
Cc:     netdev@...r.kernel.org, edumazet@...gle.com, ncardwell@...gle.com,
        soheil@...gle.com, ycheng@...gle.com
Subject: Re: [PATCH net-next] tcp: add earliest departure time to
 SCM_TIMESTAMPING_OPT_STATS

From: Yousuk Seung <ysseung@...gle.com>
Date: Thu, 30 Jul 2020 15:44:40 -0700

> This change adds TCP_NLA_EDT to SCM_TIMESTAMPING_OPT_STATS that reports
> the earliest departure time(EDT) of the timestamped skb. By tracking EDT
> values of the skb from different timestamps, we can observe when and how
> much the value changed. This allows to measure the precise delay
> injected on the sender host e.g. by a bpf-base throttler.
> 
> Signed-off-by: Yousuk Seung <ysseung@...gle.com>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Acked-by: Neal Cardwell <ncardwell@...gle.com>
> Acked-by: Soheil Hassas Yeganeh <soheil@...gle.com>
> Acked-by: Yuchung Cheng <ycheng@...gle.com>

Applied, thanks.