From mboxrd@z Thu Jan 1 00:00:00 1970 From: tsuna Subject: Re: [PATCH] tcp: Implement a two-level initial RTO as per draft RFC 2988bis-02. Date: Wed, 18 May 2011 20:56:33 -0700 Message-ID: References: <20110518.155200.801089483916944725.davem@davemloft.net> <1305771744-83951-1-git-send-email-tsunanet@gmail.com> <20110518.223622.1525088601595365235.davem@davemloft.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: kuznet@ms2.inr.ac.ru, pekkas@netcore.fi, jmorris@namei.org, yoshfuji@linux-ipv6.org, kaber@trash.net, hagen@jauu.net, eric.dumazet@gmail.com, alexander.zimmermann@comsys.rwth-aachen.de, netdev@vger.kernel.org, linux-kernel@vger.kernel.org To: David Miller Return-path: In-Reply-To: <20110518.223622.1525088601595365235.davem@davemloft.net> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Wed, May 18, 2011 at 7:36 PM, David Miller wro= te: > From: Benoit Sigoure > Date: Wed, 18 May 2011 19:22:24 -0700 > >> Prior to this patch, Linux would always use 3 seconds (compile-time >> constant) as the initial RTO. =A0Draft RFC 2988bis-02 proposes to tu= ne >> this down to 1 second and, in case of a timeout during the TCP 3WHS, >> revert the RTO back up to 3 seconds when data transmission begins. > > We just had a discussion where it was determined that changes to > these settings are "network specific" and therefore that if it > is appropriate at all (I'm still not convinced) it is only suitable > as a routing metric. =46air enough. I'll take another stab at it and see if I can change this to be on a per network basis. Do I need any patch that's not yet in Linus' tree? I'm referring to this: On Tue, May 17, 2011 at 5:20 AM, Eric Dumazet = wrote: > Adding many knobs to each clone had a huge cost on previous kernels. > (Think some machines have millions entries in IP route cache), this u= sed > quite a lot of memory. > > With latest David work, we'll consume less ram, because we can now sh= are > settings, instead of copying them on each dst entry. If this has already been merged then it sounds like I should have everything I need..? --=20 Benoit "tsuna" Sigoure Software Engineer @ www.StumbleUpon.com