This looks like the same TCP window overflow problem in 2.6.7 that came up a
couple of days back.
See the thread
http://marc.theaimsgroup.com/?t=109887532400001&r=1&w=2
and the patch posted by davem.
Thanks
Sridhar
On Fri, 29 Oct 2004, Dan A. Dickey wrote:
> All,
> We are able to reproduce what appears to be a tcp hang with
> Windows XP sending to a Linux box (2.6.7 kernel) that has
> tcp_bic turned on. At the moment, I'm unsure that tcp_bic
> has anything to do with it - I'll be testing with tcp_bic turned
> off today to see if I can reproduce this problem or not.
>
> I'm looking for someone to help me determine what the
> cause of this hang is - I have a 3MB ethereal capture file
> that I can send if you think you can help out. Let me know,
> and I'll send you the file and some more information about
> the application and what we are doing.
>
> Just in case this might help you to figure it out,
> here is a small portion of the display from ethereal at
> the point of failure. 192.168.168.126 is the Windows
> XP machine, and 192.168.168.25 is the Linux box.
>
> 14:25:58.260109 IP 192.168.168.25.15100 > 192.168.168.126.2519: . ack
> 1101042 win 39272
> 14:25:58.260116 IP 192.168.168.25.15100 > 192.168.168.126.2519: . ack
> 1102502 win 42192
> 14:25:58.260133 IP 192.168.168.126.2519 > 192.168.168.25.15100: .
> 1102502:1103962(1460) ack 1 win 65535
> 14:25:58.260143 IP 192.168.168.25.15100 > 192.168.168.126.2519: . ack
> 1103962 win 45112
> 14:25:58.260147 IP 192.168.168.126.2519 > 192.168.168.25.15100: .
> 1103962:1105422(1460) ack 1 win 65535
> 14:25:58.260155 IP 192.168.168.25.15100 > 192.168.168.126.2519: . ack
> 1105422 win 48032
> 14:25:58.260184 IP 192.168.168.126.2519 > 192.168.168.25.15100: .
> 1105422:1106882(1460) ack 1 win 65535
> 14:25:58.260191 IP 192.168.168.126.2519 > 192.168.168.25.15100: .
> 1106882:1108342(1460) ack 1 win 65535
> 14:25:58.260206 IP 192.168.168.126.2519 > 192.168.168.25.15100: .
> 1108342:1109802(1460) ack 1 win 65535
> 14:25:58.260228 IP 192.168.168.25.15100 > 192.168.168.126.2519: . ack
> 1106882 win 50952
> 14:25:58.260252 IP 192.168.168.25.15100 > 192.168.168.126.2519: . ack
> 1108342 win 53872
> 14:25:58.260273 IP 192.168.168.25.15100 > 192.168.168.126.2519: . ack
> 1109802 win 56792
> 14:25:58.260279 IP 192.168.168.25.15100 > 192.168.168.126.2519: . ack
> 1111262 win 59712
> 14:25:58.260286 IP 192.168.168.25.15100 > 192.168.168.126.2519: . ack
> 1112722 win 62632
> 14:25:58.260293 IP 192.168.168.25.15100 > 192.168.168.126.2519: . ack
> 1114182 win 16
> 14:25:58.260348 IP 192.168.168.25.15100 > 192.168.168.126.2519: . ack
> 1114506 win 16
> 14:25:58.534331 IP 192.168.168.126.2451 > 192.168.168.25.15100: .
> 160:176(16) ack 1 win 65535
> 14:25:58.534493 IP 192.168.168.25.15100 > 192.168.168.126.2451: . ack
> 176 win 16
> 14:26:03.237624 IP 192.168.168.126.2519 > 192.168.168.25.15100: .
> 1114506:1114522(16) ack 1 win 65535
> 14:26:03.237803 IP 192.168.168.25.15100 > 192.168.168.126.2519: . ack
> 1114522 win 16
> 14:26:03.565752 IP 192.168.168.126.2451 > 192.168.168.25.15100: .
> 176:192(16) ack 1 win 65535
> 14:26:03.565914 IP 192.168.168.25.15100 > 192.168.168.126.2451: . ack
> 192 win 16
> 14:26:08.269049 IP 192.168.168.126.2519 > 192.168.168.25.15100: .
> 1114522:1114538(16) ack 1 win 65535
> 14:26:08.269217 IP 192.168.168.25.15100 > 192.168.168.126.2519: . ack
> 1114538 win 16
> 14:26:08.597185 IP 192.168.168.126.2451 > 192.168.168.25.15100: .
> 192:208(16) ack 1 win 65535
> 14:26:08.597347 IP 192.168.168.25.15100 > 192.168.168.126.2451: . ack
> 208 win 16
> 14:26:13.300469 IP 192.168.168.126.2519 > 192.168.168.25.15100: .
> 1114538:1114554(16) ack 1 win 65535
> 14:26:13.300640 IP 192.168.168.25.15100 > 192.168.168.126.2519: . ack
> 1114554 win 16
> 14:26:13.628603 IP 192.168.168.126.2451 > 192.168.168.25.15100: .
> 208:224(16) ack 1 win 65535
> 14:26:13.628774 IP 192.168.168.25.15100 > 192.168.168.126.2451: . ack
> 224 win 16
> 14:26:18.331909 IP 192.168.168.126.2519 > 192.168.168.25.15100: .
> 1114554:1114570(16) ack 1 win 65535
> 14:26:18.332075 IP 192.168.168.25.15100 > 192.168.168.126.2519: . ack
> 1114570 win 16
> 14:26:18.660013 IP 192.168.168.126.2451 > 192.168.168.25.15100: .
> 224:240(16) ack 1 win 65535
> 14:26:18.660174 IP 192.168.168.25.15100 > 192.168.168.126.2451: . ack
> 240 win 16
>
>
> I'm not sure how well this is going to come across, but as I said - I
> can send the capture file. Please help! Thanks in advance.
> (My concern is the window on the Linux side dropping from 62632
> to 16 at the 14:25:58.260293 point - this just doesn't seem right).
> -Dan
>
> --
> Dan A. Dickey
> dan.dickey@xxxxxxxxxx
>
> SAVVIS
> Transforming Information Technology
>
>
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