Mark Lord wrote:
..
The differences I see are widely varying "window sizes".
What would cause this?
This is from (working) 2.6.16.18:
IP silvy.localnet.56224 > 216-145-246-23.rev.dls.net.www: . ack 1 win 1460 <nop,nop,timestamp 730448 134760199>
IP silvy.localnet.56224 > 216-145-246-23.rev.dls.net.www: P 1:607(606) ack 1 win 1460 <nop,nop,timestamp 730448 134760199>
IP 216-145-246-23.rev.dls.net.www > silvy.localnet.56224: P 1:206(205) ack 607 win 32798 <nop,nop,timestamp 134760217 730448>
IP silvy.localnet.56224 > 216-145-246-23.rev.dls.net.www: . ack 206 win 1728 <nop,nop,timestamp 730626 134760217>
This is from (failing) 2.6.17-rc6-git2:
IP silvy.localnet.33472 > 216-145-246-23.rev.dls.net.www: . ack 1 win 92 <nop,nop,timestamp 4294759337 134771817>
IP silvy.localnet.33472 > 216-145-246-23.rev.dls.net.www: P 1:607(606) ack 1 win 92 <nop,nop,timestamp 4294759337 134771817>
IP silvy.localnet.33472 > 216-145-246-23.rev.dls.net.www: P 1:607(606) ack 1 win 92 <nop,nop,timestamp 4294760162 134771817>
IP 216-145-246-23.rev.dls.net.www > silvy.localnet.33472: . ack 607 win 32798 <nop,nop,timestamp 134771918 4294760162>
Both kernels default to /proc/sys/net/ipv4/tcp_window_scaling == 1,
and 2.6.16.18 works regardless of whether I turn it off/on again.
But 2.6.17-rc6-git2 fails to work with the webserver at www.everymac.com
when /proc/sys/net/ipv4/tcp_window_scaling == 1. Setting this to 0
"fixes" the problem.
BUG.
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