From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: [PATCH] RFC2988bis + taking RTT sample from 3WHS for the passive open side Date: Wed, 08 Jun 2011 23:03:25 +0200 Message-ID: <1307567005.3980.1.camel@edumazet-laptop> References: <1307509203-30973-1-git-send-email-hkchu@google.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: David Miller , Hagen Paul Pfeifer , tsunanet@gmail.com, "netdev@vger.kernel.org" To: Jerry Chu Return-path: Received: from mail-wy0-f174.google.com ([74.125.82.174]:41251 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754920Ab1FHVD3 (ORCPT ); Wed, 8 Jun 2011 17:03:29 -0400 Received: by wya21 with SMTP id 21so673273wya.19 for ; Wed, 08 Jun 2011 14:03:28 -0700 (PDT) In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: Le mercredi 08 juin 2011 =C3=A0 11:04 -0700, Jerry Chu a =C3=A9crit : > [resent to cc netdev] >=20 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. >=20 > 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. >=20 > 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. >=20 > Signed-off-by: H.K. Jerry Chu > ---