Message-ID: <421B9317.7000209@ev-en.org>
Date: Tue, 22 Feb 2005 20:16:23 +0000
From: Baruch Even <baruch@ev-en.org>
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To: Stephen Hemminger <shemminger@osdl.org>
Cc: mlists@danielinux.net, "David S. Miller" <davem@davemloft.net>,
       linux-net@vger.kernel.org, linux-kernel@vger.kernel.org,
       Carlo Caini <ccaini@deis.unibo.it>,
       Rosario Firrincieli <rfirrincieli@arces.unibo.it>
Subject: Re: [PATCH] TCP-Hybla proposal
References: <200502221534.42948.mlists@danielinux.net> <20050222094219.0a8efbe1@dxpl.pdx.osdl.net>
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Stephen Hemminger wrote:
> On Tue, 22 Feb 2005 15:34:42 +0100
> Daniele Lacamera <mlists@danielinux.net> wrote:
>>One last note: IMHO we really need a better way to select congestion 
>>avoidance scheme between those available, instead of switching each one 
>>on and off. I.e., we can't say how vegas and westwood perform when 
>>switched on together, can we?
> 
> The protocol choices are mutually exclusive, if you walk through the code
> (or do experiments), you find that that only one gets used.  As part of the
> longer term plan, I would like to:
> 	- have one sysctl
> 	- choice by route and destination
> 	- union for fields in control block

I'm currently working on a patch to make it a single sysctl, I've got it 
working (as in, the kernel doesn't crash). I still need to validate the 
actual implementation.

I'd say the next stage is to merge fields as much as possible.

I doubt the real use of selection by route/dest, all of the high-speed 
protocols (except possibly for TCP-Hybla) are intended for sender-only 
servers who push lots of data and should work in all cases and alongside 
  Reno TCP traffic without undue unfairness.

I hope to finish the clean-up and preparation of H-TCP for inclusion in 
the kernel and can then help with the unionisation.

Baruch
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