Hi Alexey,
Do you think this will also fix Ion's issue with small window size never
going back up ?
Thanks
Guillaume.
Alexey Kuznetsov wrote:
Hello!
Here are the dumps...
I see. It has nothing to do with clamping. Indeed this is a very old bug.
Frankly speaking I even was aware about this at some moment
(so that if the sender was Linux it would not happen. It was fixed there. :-))
With such small window sender is forced to send a tiny segment
via SWS override timer and receiver is confused in believing this
is sender's mss, so the result is broken SWS avoidance.
I think you can cure it deleting the following lines:
/* If PSH is not set, packet should be
* full sized, provided peer TCP is not badly broken.
* This observation (if it is correct 8)) allows
* to handle super-low mtu links fairly.
*/
(len >= TCP_MIN_MSS + sizeof(struct tcphdr) &&
!(tcp_flag_word(skb->h.th)&TCP_REMNANT))) {
in tcp_input.c:tcp_measure_rcv_mss() at receiver side.
Alexey
--
=======================================
Guillaume Autran
Senior Software Engineer
MRV Communications, Inc.
Tel: (978) 952-4932 office
E-mail: gautran@xxxxxxx
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