kernel 2.4.18-ac3 smp , iproute2-2.4.7-now-ss020116-try.tar.gz I am using the following scripts to adjust my traffic during certain periods of time , running them cron and sometimes by hand . They can reliably freeze the system if they are run certain number of times . No oops/panic/errors of whatsoever , just a frozen system . the following "fast" script freezes the system after it is executed 7-8 times tc qdisc del dev eth0 root tc qdisc add dev eth0 root handle 10: cbq bandwidth 100Mbit avpkt 1000 tc class add dev eth0 parent 10:0 classid 10:1 cbq bandwidth 100Mbit \ rate 100Mbit allot 1514 weight 10Mbit prio 8 maxburst 20 avpkt 1000 tc class add dev eth0 parent 10:1 classid 10:100 cbq bandwidth 100Mbit \ rate 100Mbit allot 1514 weight 10Mbit prio 5 maxburst 20 avpkt 1000 tc class add dev eth0 parent 10:1 classid 10:200 cbq bandwidth 100Mbit \ rate 100Mbit allot 1514 weight 10Mbit prio 5 maxburst 20 avpkt 1000 tc qdisc add dev eth0 parent 10:100 sfq quantum 1514b perturb 10 tc qdisc add dev eth0 parent 10:200 tbf rate 6Mbit latency 50ms burst \ 50000 tc qdisc del dev eth0 ingress tc qdisc add dev eth0 handle ffff: ingress tc filter add dev eth0 parent ffff: protocol ip prio 2 u32 match ip \ protocol 1 0xFF police rate 1kbit burst 10000 mtu 1k drop flowid :1 tc filter add dev eth0 parent 10: protocol ip prio 1 u32 match ip dst \ 1.2.3.0/16 flowid 10:100 tc filter add dev eth0 parent 10: protocol ip prio 1 u32 match tcp src \ 22 0xffff match ip protocol 0x6 0xff flowid 10:100 tc filter add dev eth0 parent 10: protocol ip prio 1 u32 match ip src \ 1.2.3.25/32 flowid 10:200 The following "slow" script freezes the system after being executed around 11-18 times tc qdisc del dev eth0 root tc qdisc add dev eth0 root handle 10: cbq bandwidth 100Mbit avpkt 1000 tc class add dev eth0 parent 10:0 classid 10:1 cbq bandwidth 100Mbit \ rate 100Mbit allot 1514 weight 10Mbit prio 8 maxburst 20 avpkt 1000 tc class add dev eth0 parent 10:1 classid 10:100 cbq bandwidth 100Mbit \ rate 100Mbit allot 1514 weight 10Mbit prio 5 maxburst 20 avpkt 1000 tc class add dev eth0 parent 10:1 classid 10:200 cbq bandwidth 100Mbit \ rate 100Mbit allot 1514 weight 10Mbit prio 5 maxburst 20 avpkt 1000 tc qdisc add dev eth0 parent 10:100 sfq quantum 1514b perturb 10 tc qdisc add dev eth0 parent 10:200 tbf rate 3Mbit latency 50ms burst \ 50000 tc qdisc del dev eth0 ingress tc qdisc add dev eth0 handle ffff: ingress tc filter add dev eth0 parent ffff: protocol ip prio 2 u32 match ip \ protocol 1 0xFF police rate 1kbit burst 10000 mtu 1k drop flowid :1 tc filter add dev eth0 parent 10: protocol ip prio 1 u32 match ip dst \ 1.2.3.0/16 flowid 10:100 tc filter add dev eth0 parent 10: protocol ip prio 1 u32 match tcp src \ 22 0xffff match ip protocol 0x6 0xff flowid 10:100 tc filter add dev eth0 parent 10: protocol ip prio 1 u32 match ip src \ 1.2.3.25/32 flowid 10:200 The ingress related parts are the prime suspects for me , i added them recently . Before that no freezing has ever ocurred . I couldn't perform more tests because the box is a rather busy server and the lockups cause painfull reboots . Any advice is welcomed . Kind regards , -- ============================================================================= Dimitris Zilaskos Department of Physics @ Aristotle Univercity of Thessaloniki , Greece ============================================================================= _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
