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

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Message-ID: <87fx1e1sat.fsf@basil.nowhere.org>
Date:	Wed, 26 May 2010 19:33:46 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Tom Herbert <therbert@...gle.com>
Cc:	David Miller <davem@...emloft.net>, shemminger@...tta.com,
	netdev@...r.kernel.org, ycheng@...gle.com
Subject: Re: [PATCH] tcp: Socket option to set congestion window

Tom Herbert <therbert@...gle.com> writes:
>>
> Thanks to NAT, the concept of a network path or even host specific
> path is a weakened concept.  On the Internet this may be a path
> characteristic per client, which unfortunately has no visibility in
> the kernel other than per connection state.  When a single IP address
> may have thousands of hosts behind it, caching TCP parameters for that
> IP address is implicitly doing a huge aggregation-- probably dicey...

Yes all of Saudi-Arabia used to be (is?) one IP address...

Caching anything per IP is bogus.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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