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Re: Karn's rule in Linux TCP

To: ak@xxxxxxx
Subject: Re: Karn's rule in Linux TCP
From: "David S. Miller" <davem@xxxxxxxxxx>
Date: Mon, 6 Nov 2000 22:12:44 -0800
Cc: kuznet@xxxxxxxxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <20001106220115.A26879@xxxxxxxxxxxxxxxxxxx> (message from Andi Kleen on Mon, 6 Nov 2000 22:01:15 +0100)
References: <20001106220115.A26879@xxxxxxxxxxxxxxxxxxx>
Sender: owner-netdev@xxxxxxxxxxx
   Date: Mon, 6 Nov 2000 22:01:15 +0100
   From: Andi Kleen <ak@xxxxxxx>

   So one way to solve it would be to turn off the Karn filter after a few
   retransmits in tcp_ack_no_tstamp().  The hard to tune thing is how many
   retransmits it should wait. It depends what are good practical
   upper boundaries for packet live times in the real internet.

If you spent some time implementing this and trying to tune
it, I would accept such a patch.

   Any suggestions on that?  Any other ideas? 

This is certainly tcp-impl (or end2end, but not both) material, please
Andi discuss your findings on one of those two lists, I bet you will
get a precise response from those in the know :-)

Later,
David S. Miller
davem@xxxxxxxxxx

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