Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934433Ab1ESTbE (ORCPT ); Thu, 19 May 2011 15:31:04 -0400 Received: from shards.monkeyblade.net ([198.137.202.13]:40807 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934236Ab1ESTbB (ORCPT ); Thu, 19 May 2011 15:31:01 -0400 Date: Thu, 19 May 2011 15:27:03 -0400 (EDT) Message-Id: <20110519.152703.1327182804872376183.davem@davemloft.net> To: tsunanet@gmail.com Cc: alexander.zimmermann@comsys.rwth-aachen.de, hagen@jauu.net, kuznet@ms2.inr.ac.ru, pekkas@netcore.fi, jmorris@namei.org, yoshfuji@linux-ipv6.org, kaber@trash.net, eric.dumazet@gmail.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] tcp: Implement a two-level initial RTO as per draft RFC 2988bis-02. From: David Miller In-Reply-To: References: <1456193D-84D1-46E2-B930-8FD0A5B8C409@comsys.rwth-aachen.de> X-Mailer: Mew version 6.3 on Emacs 23.2 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.6 (shards.monkeyblade.net [198.137.202.13]); Thu, 19 May 2011 12:27:08 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 981 Lines: 25 From: tsuna Date: Thu, 19 May 2011 10:11:50 -0700 > Looking through the kernel, I see that SCTP already has knobs for > this: sctp_rto_initial, sctp_rto_min, sctp_rto_max. You can even > control the constants used to update rttvar and srtt: sctp_rto_alpha, > sctp_rto_beta SCTP is 1) not even a sliver of deployment compared to TCP and 2) doesn't get nearly the same scrutiny on patch review that TCP changes do. I basically let the SCTP folks play in their own sandbox, because frankly SCTP doesn't matter. The only time I care about an SCTP change is when it has an impact on the rest of the networking code. So using SCTP as an example of "see we do this already over here" is a non-starter. Don't do it. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/