netdev - Re: [PATCH] tcp: Expose the initial RTO via a new sysctl.

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Message-ID: <e6b52d895fca947b4cce2896d593619b@localhost>
Date:	Tue, 17 May 2011 13:02:47 +0200
From:	Hagen Paul Pfeifer <hagen@...u.net>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Benoit Sigoure <tsunanet@...il.com>, <davem@...emloft.net>,
	<kuznet@....inr.ac.ru>, <pekkas@...core.fi>, <jmorris@...ei.org>,
	<yoshfuji@...ux-ipv6.org>, <kaber@...sh.net>,
	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tcp: Expose the initial RTO via a new sysctl.

On Tue, 17 May 2011 10:07:57 +0200, Eric Dumazet wrote:

> I wont discuss if introducing a new sysctl is welcomed, only on patch
> issues. I believe some work in IETF is done to reduce the 3sec value to
> 1sec anyway.

Why not? I though all new knobs in this area should be done on a per route
metric so it can be controlled on a per path basis. RTO should be
adjustable on a per path basis, because it depends on the path.

Some months back [1] I posted a patch to enable/disable TCP quick ack
mode, which has nothing to do with network paths, just with a local server
policy. But David rejected the patch with the argument that I should use a
per path knob (this is a little bit inapprehensible for me, but David has
the last word).

Hagen

[1] http://kerneltrap.org/mailarchive/linux-netdev/2010/8/23/6283640
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