netdev - Re: [PATCH 0/2 net-next] tcp: reducing lost retransmits in recovery

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Message-Id: <20150708.133003.612921512265899727.davem@davemloft.net>
Date:	Wed, 08 Jul 2015 13:30:03 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	ycheng@...gle.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH 0/2 net-next] tcp: reducing lost retransmits in recovery

From: Yuchung Cheng <ycheng@...gle.com>
Date: Wed,  1 Jul 2015 14:11:13 -0700

> This patch series reduces lost retransmits in recovery, in particular
> when dealing with traffic policers. The main problem is that
> slow start in recovery under policing can cause massive lost and
> retransmit storms: any excess sending rate turns into drops. The
> solution is to avoid doing slow start when lost retransmit is
> detected and use packet conservation instead.
> 
> On networks with traffic policers the patches have lowered the
> TCP loss rates by ~20% from Google servers without latency regressions.

Looks great, series applied to net-next.
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