netdev - Re: [PATCH] tcp: Socket option to set congestion window

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Message-ID: <20100526212745.GC24615@basil.fritz.box>
Date:	Wed, 26 May 2010 23:27:45 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	David Miller <davem@...emloft.net>
Cc:	andi@...stfloor.org, therbert@...gle.com, shemminger@...tta.com,
	netdev@...r.kernel.org, ycheng@...gle.com
Subject: Re: [PATCH] tcp: Socket option to set congestion window

> > Yes all of Saudi-Arabia used to be (is?) one IP address...
> > 
> > Caching anything per IP is bogus.
> 
> And letting the applications choose the CWND is better?!?!

No I actually agree with you on that. Just saying that
anything that relies on per IP caching is bad too.

As I understand the idea was that the application knows
what flows belong to a single peer and wants to have
a single cwnd for all of those. Perhaps there would
be a way to generalize that to tell it to the kernel.

e.g. have a "peer id"  that is known by applications
and the kernel could manage cwnds shared between connections
associated with the same peer id?

Just an idea, I admit I haven't thought very deeply
about this. Feel free to poke holes into it.

-Andi
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