netdev - Re: [PATCH] Add rtnetlink init_rcvwnd to set the TCP initial receive window

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Message-Id: <20091223.141630.115937361.davem@davemloft.net>
Date:	Wed, 23 Dec 2009 14:16:30 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	chavey@...gle.com
Cc:	netdev@...r.kernel.org, therbert@...gle.com, eric.dumazet@...il.com
Subject: Re: [PATCH] Add rtnetlink init_rcvwnd to set the TCP initial
 receive window

From: chavey@...gle.com
Date: Tue, 15 Dec 2009 13:15:28 -0800

> Add rtnetlink init_rcvwnd to set the TCP initial receive window size
> advertised by passive and active TCP connections.
> The current Linux TCP implementation limits the advertised TCP initial
> receive window to the one prescribed by slow start. For short lived
> TCP connections used for transaction type of traffic (i.e. http
> requests), bounding the advertised TCP initial receive window results
> in increased latency to complete the transaction.
> Support for setting initial congestion window is already supported
> using rtnetlink init_cwnd, but the feature is useless without the
> ability to set a larger TCP initial receive window.
> The rtnetlink init_rcvwnd allows increasing the TCP initial receive
> window, allowing TCP connection to advertise larger TCP receive window
> than the ones bounded by slow start.
> 
> Signed-off-by: Laurent Chavey <chavey@...gle.com>

Applied.
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