Bug#407735: 2.6.18-3-686 tcp_window_scaling serious problem
This thread looks like it nails the issue:
http://www.linuxquestions.org/questions/showthread.php?t=514191&page=2
>From the thread:
"Setting back the values to those of an earlier kernel does the trick:
Code:
root@slackw:$ echo "4096 16384 131072" > /proc/sys/net/ipv4/tcp_wmem
root@slackw:$ echo "4096 87380 174760" > /proc/sys/net/ipv4/tcp_rmem
"
Sure enough I checked these values and here is what they were:
/proc/sys/net/ipv4/tcp_wmem 4096 16384 4194304
/proc/sys/net/ipv4/tcp_rmem 4096 87380 4194304
When I turned tcp_window_scaling back on, using these values the problem
exists. I then used the values in the suggestion above and it fixes the
problem.
For the time being I have put these lines in my /etc/sysctl.conf:
# No longer needed, fixed by lines below
#net.ipv4.tcp_window_scaling=0
# Fix for tcp window scaling issue related to broken Internet routers
proc.sys.net.ipv4.tcp_wmem="4096 16384 131072"
proc.sys.net.ipv4.tcp_rmem="4096 87380 174760"
# Default Debian values for these, still causing problems as of 2.6.18-3
#proc.sys.net.ipv4.tcp_wmem="4096 16384 4194304"
#proc.sys.net.ipv4.tcp_rmem="4096 87380 4194304"
--
daniel
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