netdev - Re: [PATCH] RFC2988bis + taking RTT sample from 3WHS for the passive open side

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Message-Id: <20110608.170622.443237000314177581.davem@davemloft.net>
Date:	Wed, 08 Jun 2011 17:06:22 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	hkchu@...gle.com
Cc:	eric.dumazet@...il.com, hagen@...u.net, tsunanet@...il.com,
	netdev@...r.kernel.org
Subject: Re: [PATCH] RFC2988bis + taking RTT sample from 3WHS for the
 passive open side

From: "H.K. Jerry Chu" <hkchu@...gle.com>
Date: Wed,  8 Jun 2011 14:08:38 -0700

> From: Jerry Chu <hkchu@...gle.com>
> 
> This patch lowers the default initRTO from 3secs to 1sec per
> RFC2988bis. It falls back to 3secs if the SYN or SYN-ACK packet
> has been retransmitted, AND the TCP timestamp option is not on.
> 
> It also adds support to take RTT sample during 3WHS on the passive
> open side, just like its active open counterpart, and uses it, if
> valid, to seed the initRTO for the data transmission phase.
> 
> The patch also resets ssthresh to its initial default at the
> beginning of the data transmission phase, and reduces cwnd to 1 if
> there has been MORE THAN ONE retransmission during 3WHS per RFC5681.
> 
> Signed-off-by: H.K. Jerry Chu <hkchu@...gle.com>

Ok, I'll apply this to net-next-2.6

We can add any necessary follow-on tweaks.

Thanks!
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