class/qdisc question

class/qdisc question

[Lars Landmark]

HI;

I am trying to write my own class based queue. But as usual some problems 
seems not to be resolved.

I have achieved to send package through my queue.  This can be done if I 
not attach class or filters.  If I do try to attach class or filter, my 
computer stops. I can not read any message, nor do anything. My only 
choice is to push power button in order to reboot.  

My "queue" is compiled as module and if I do "insmod", 
it is loaded in to kernel.  This operation do not report any error.

[root@lars larslan]# /sbin/insmod sch_kll
Using /lib/modules/2.4.20/kernel/net/sched/sch_kll.o


/sbin/lsmod  report
Module                  Size  Used by    Not tainted
sch_htb                21088   1
sch_kll                9608    0 (autoclean) (unused)
3c59x                  28520   2


When I now configure this module width my patched tc file 
************
root@lars iproute2.lars]# ./tc/tc qdisc add dev eth0 root handle 1: kll   
default 5
************
output from /sbin/lsmod do not change. It still says used by 0 and 
(unused).

I have written som output in every procedyre, and dmesg report that this 
procedures are called
*************
[root@lars iproute2.lars]# dmesg
KLL: inne i classify?
KLL: inne i dequeue?
KLL: inne i dequeue?
....
*************
So my question is, how can this happen? 
I thought that at once I configure module, 
modules usage count would be incremented???
Is there any possibility, that when I attach a filter my computer crash 
because kernel do not know kll-module is in use???

I would be very happy if some could tell me what I have been missed...

Any suggestion is appreciated, 
Thanks in advance

Lars 
Student 

Re: class/qdisc question

[James R. Leu]

I suggest moving your development to user-mode-linux, then you can attach
a debugger and track down the location of the lockup.

http://sf.net/projects/user-mode-linux/

On Tue, Mar 18, 2003 at 07:22:08PM +0100, Lars Landmark wrote:
> HI;
> 
> I am trying to write my own class based queue. But as usual some problems 
> seems not to be resolved.
> 
> I have achieved to send package through my queue.  This can be done if I 
> not attach class or filters.  If I do try to attach class or filter, my 
> computer stops. I can not read any message, nor do anything. My only 
> choice is to push power button in order to reboot.  
> 
> My "queue" is compiled as module and if I do "insmod", 
> it is loaded in to kernel.  This operation do not report any error.
> 
> [root@lars larslan]# /sbin/insmod sch_kll
> Using /lib/modules/2.4.20/kernel/net/sched/sch_kll.o
> 
> 
> /sbin/lsmod  report
> Module                  Size  Used by    Not tainted
> sch_htb                21088   1
> sch_kll                9608    0 (autoclean) (unused)
> 3c59x                  28520   2
> 
> 
> When I now configure this module width my patched tc file 
> ************
> root@lars iproute2.lars]# ./tc/tc qdisc add dev eth0 root handle 1: kll   
> default 5
> ************
> output from /sbin/lsmod do not change. It still says used by 0 and 
> (unused).
> 
> I have written som output in every procedyre, and dmesg report that this 
> procedures are called
> *************
> [root@lars iproute2.lars]# dmesg
> KLL: inne i classify?
> KLL: inne i dequeue?
> KLL: inne i dequeue?
> ....
> *************
> So my question is, how can this happen? 
> I thought that at once I configure module, 
> modules usage count would be incremented???
> Is there any possibility, that when I attach a filter my computer crash 
> because kernel do not know kll-module is in use???
> 
> I would be very happy if some could tell me what I have been missed...
> 
> Any suggestion is appreciated, 
> Thanks in advance
> 
> Lars 
> Student 
> 
> 

-- 
James R. Leu