I had IMQ running smoothly for nearly 4 hours, then my linux box started
alarming as if the CPU had overheated (which was not the case). The box was
completely locked up. I''m not sure if this is an IMQ related problem or
what. I''m leaning toward an IMQ problem since I''ve not had a
problem like this before and have been running iproute2/iptables for 8+ months
now.
After a hard reboot, I scanned through the messages log and found this error
message moments before the crash had occurred.
kernel: KERNEL: assertion (tp->retrans_out == 0) failed at tcp_input.c(1614)
My system specs:
P3 933 mHz
512 MB PC133
RH 9.0
iptables-1.2.8
iproute-2.4.7-7
The following is my IMQ/HTB/SFQ setup:
##Remove ALL tc qdiscs and classes first by deleting root handle
tc qdisc del dev imq0 root > /dev/null 2>&1 #remove any imq qdiscs
##Add HTB Root Handle
tc qdisc add dev imq0 root handle 1: htb default 20
##Add Primary Parent
tc class add dev imq0 parent 1: classid 1:1 htb rate 100mbit ceil 100mbit
##Add Prmary Children
tc class add dev imq0 parent 1:1 classid 1:10 htb rate 50mbit ceil 50mbit
tc qdisc add dev imq0 parent 1:10 handle 10: sfq perturb 10
tc class add dev imq0 parent 1:1 classid 1:20 htb rate 128kbit ceil 128kbit
tc qdisc add dev imq0 parent 1:20 handle 20: sfq perturb 10
tc filter add dev imq0 parent 1: protocol ip handle 5 fw flowid 1:10
$IPTABLES -A PREROUTING -t mangle --src X.X.X.X/X -j MARK --set-mark 5
$IPTABLES -A PREROUTING -t mangle --dst X.X.X.X/X -j MARK --set-mark 5
$IPTABLES -A PREROUTING -t mangle -j IMQ --todev 0 #Send all packets passing
through
$IPTABLES -A POSTROUTING -t mangle -j IMQ --todev 0 #mangle table to IMQ device
Any help would be greatly appreciated.
Regards,
Walt
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