netdev - initial congestion window for connections in the listen queue

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Date:	Mon, 13 Apr 2009 23:46:15 +0300
From:	Octavian Purdila <opurdila@...acom.com>
To:	netdev@...r.kernel.org
Subject: initial congestion window for connections in the listen queue


A question for the TCP wizards:

>struct sock *tcp_create_openreq_child(struct sock *sk, 
>        struct request_sock >*req, struct sk_buff *skb)
>{
>...
>         /* So many TCP implementations out there (incorrectly) count the
>          * initial SYN frame in their delayed-ACK and congestion control
>          * algorithms that we must have the following bandaid to talk 
>          * efficiently to them.  -DaveM
>          */
>          newtp->snd_cwnd = 2;

Shouldn't the same logic from tcp_init_cwnd() be used here?

>From my traces, this seems to prevent TSO from helping short lived 
connections.

Thanks,
tavi

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