linux-kernel - Re: What happened to CONFIG_TCP_NAGLE

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Message-Id: <E1GqLZ0-0006iY-00@gondolin.me.apana.org.au>
Date:	Sat, 02 Dec 2006 14:29:18 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	psusi@....rr.com (Phillip Susi)
Cc:	alan@...rguk.ukuu.org.uk, matthew.garman@...il.com,
	linux-kernel@...r.kernel.org
Subject: Re: What happened to CONFIG_TCP_NAGLE_OFF?

Phillip Susi <psusi@....rr.com> wrote:
> 
> UDP is highly appropriate because the congestion controls and other 
> features of TCP are not required for this type of data, and in fact, 
> tend to muck things up.  That is why the application needs to implement 
> its own congestion, sequencing, retransmit and connect/disconnect 
> controls; because the way TCP handles them is not good for this 
> application.

Congestion control is always appropriate in a shared network.  Please
note that congestion control does not conflict with the objectives of
UDP.  For UDP, congestion control can simply mean dropping packets at
the source.  DCCP is a good replacement for UDP that has congestion
control.

In general it's much better to much better to drop packets at the
source rather than half-way through.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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