[LARTC] Errors with GRED after upgrading to 2.6.18 kernel

[Andy Furniss]

Flechsenhaar, Jon J wrote:
> ALL:
> 
> 
>  <<diffserv-gred_10-06>> 
> 
> I have attached the current script that I am using.  
> 
> $TC qdisc add dev $EDEV parent 2:20 gred setup DPs 3 default 2 grio
> $TC qdisc change dev $EDEV parent 2:20 gred DP 1 limit $lim min $minTh
> max $maxTh avpkt $avgPL burst $bursty bandwidth $netBand probability
> 0.02 prio 2
> $TC qdisc change dev $EDEV parent 2:20 gred DP 2 limit $lim min $minTh
> max $maxTh avpkt $avgPL burst $bursty bandwidth $netBand probability
> 0.04 prio 3
> $TC qdisc change dev $EDEV parent 2:20 gred DP 3 limit $lim min $minTh
> max $maxTh avpkt $avgPL burst $bursty bandwidth $netBand probability
> 0.06 prio 4
> ### GRED for AF2
> 
> $TC qdisc add dev $EDEV parent 2:30 gred setup DPs 3 default 2 grio
> $TC qdisc change dev $EDEV parent 2:30 gred DP 1 limit $lim min $minTh
> max $maxTh avpkt $avgPL burst $bursty bandwidth $netBand probability
> 0.02 prio 2
> $TC qdisc change dev $EDEV parent 2:30 gred DP 2 limit $lim min $minTh
> max $maxTh avpkt $avgPL burst $bursty bandwidth $netBand probability
> 0.04 prio 3
> $TC qdisc change dev $EDEV parent 2:30 gred DP 3 limit $lim min $minTh
> max $maxTh avpkt $avgPL burst $bursty bandwidth $netBand probability
> 0.06 prio 4
> ### GRED for AF3
> 
> $TC qdisc add dev $EDEV parent 2:40 gred setup DPs 3 default 2 grio
> $TC qdisc change dev $EDEV parent 2:40 gred DP 1 limit $lim min $minTh
> max $maxTh avpkt $avgPL burst $bursty bandwidth $netBand probability
> 0.02 prio 2
> $TC qdisc change dev $EDEV parent 2:40 gred DP 2 limit $lim min $minTh
> max $maxTh avpkt $avgPL burst $bursty bandwidth $netBand probability
> 0.04 prio 3
> $TC qdisc change dev $EDEV parent 2:40 gred DP 3 limit $lim min $minTh
> max $maxTh avpkt $avgPL burst $bursty bandwidth $netBand probability
> 0.06 prio 4
> ### GRED for AF4
> 
> $TC qdisc add dev $EDEV parent 2:50 gred setup DPs 3 default 2 grio
> $TC qdisc change dev $EDEV parent 2:50 gred DP 1 limit $lim min $minTh
> max $maxTh avpkt $avgPL burst $bursty bandwidth $netBand probability
> 0.02 prio 2
> $TC qdisc change dev $EDEV parent 2:50 gred DP 2 limit $lim min $minTh
> max $maxTh avpkt $avgPL burst $bursty bandwidth $netBand probability
> 0.04 prio 3
> $TC qdisc change dev $EDEV parent 2:50 gred DP 3 limit $lim min $minTh
> max $maxTh avpkt $avgPL burst $bursty bandwidth $netBand probability
> 0.06 prio 4
> 
> Each DP3 line gives me an error.  If I comment it out the error goes
> away.  The line translates to below.  
> 
> I get an error with the following line
> ++ /usr/sbin/tc qdisc change dev eth0 parent 2:20 gred DP 3 limit 60kb
> min 10kb max 20kb avpkt 1500 burst 9 bandwidth 500kbit probability 0.06
> prio 4 RTNETLINK answers: Invalid argument
> 
> after each DP 3 on each gred.
> 
> This starting happening after I upgraded to 2.6.18 from 2.4.20 kernel.
> Anyone have any ideas?

I would ask on netdev about this one - I don't use GRED - the last 
changes I can remember were by Thomas Graf, I don't think he lurks here 
anymore.

Andy.