Re: [LARTC] What is: "Consider r2q change"

["Oliver Schulze L." <oliver@samera.com.py>]

Hi, yes, thats right, the problem was only with leaf classes.
Thanks for clarifyind that

Oliver

m.innocenti@cineca.it wrote:

> Oliver Schulze L. ha scritto:
>
>> I'm getting this warning/error in /var/log/messages:
>> May 26 18:21:05 mail kernel: HTB: quantum of class 10010 is small. 
>> Consider r2q change.
>> Its a big deal? What should I do?
>
>
> If I understand the source, that message occours when you have a leaf 
> class whose calculated quantum (rate/r2q) is less than 1000 byte and 
> the kernel set the quantum to 1000 byte.
> I've read that the quantum should be bigger than the MTU so I don't 
> understand why the kernel don't use a minimum quantum value bigger 
> than 1500. Someone has a clue?
>
> From kernel-source-2.6.10/net/sched/sch_htb.c
> if (!hopt->quantum && cl->un.leaf.quantum < 1000) {
>    printk(KERN_WARNING "HTB: quantum of class %X is small. Consider 
> r2q change.\n", cl->classid);
>    cl->un.leaf.quantum = 1000;
>
>
>
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