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Date:	Wed, 08 Jun 2011 23:03:25 +0200
From:	Eric Dumazet <>
To:	Jerry Chu <>
Cc:	David Miller <>,
	Hagen Paul Pfeifer <>,,
	"" <>
Subject: Re: [PATCH] RFC2988bis + taking RTT sample from 3WHS for the
 passive open side

Le mercredi 08 juin 2011 à 11:04 -0700, Jerry Chu a écrit :
> [resent to cc netdev]

Well, the first copy I received this morning was OK ;)

But this second one is mangled by your mailer or something ?

> 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 <>
> ---

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