netdev - Re: [PATCH net] tcp: avoid multiple ssthresh reductions in on retransmit window

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Message-ID: <CADVnQykk0pmryWdRjq21OXYK3Pvi5xWCkaB7Jf2acF5qtnzANg@mail.gmail.com>
Date:	Mon, 16 Jun 2014 20:44:04 -0400
From:	Neal Cardwell <ncardwell@...gle.com>
To:	Yuchung Cheng <ycheng@...gle.com>
Cc:	Michal Kubecek <mkubecek@...e.cz>,
	"David S. Miller" <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>
Subject: Re: [PATCH net] tcp: avoid multiple ssthresh reductions in on
 retransmit window

On Mon, Jun 16, 2014 at 8:25 PM, Yuchung Cheng <ycheng@...gle.com> wrote:
> However Linux is inconsistent on the loss of a retransmission. It
> reduces ssthresh (and cwnd) if this happens on a timeout, but not in
> fast recovery (tcp_mark_lost_retrans). We should fix that and that
> should help dealing with traffic policers.

Yes, great point!

neal
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