Re: [PATCH net-next v2] tcp: Ensure DCTCP reacts to losses

From: Neal Cardwell
Date: Thu Apr 04 2019 - 09:48:23 EST


On Thu, Apr 4, 2019 at 8:24 AM Tilmans, Olivier (Nokia - BE/Antwerp)
<olivier.tilmans@xxxxxxxxxxxxxxxxxxx> wrote:
>
> From: Koen De Schepper <koen.de_schepper@xxxxxxxxxxxxxxxxxxx>
>
> RFC8257 Â3.5 explicitly states that "A DCTCP sender MUST react to
> loss episodes in the same way as conventional TCP".
...
> This patch replace the clamping of alpha by setting ssthresh to
> half of cwnd for both fast retransmissions and RTOs, at most once
> per RTT. Consequently, the dctcp_clamp_alpha_on_loss module parameter
> has been removed.

Acked-by: Neal Cardwell <ncardwell@xxxxxxxxxx>

Thanks!

neal