Too much work at interrupt

[Donald Becker]

On Sat, 7 Nov 1998, Daniel Veillard wrote:

> message (while they show the "SMP simultaneous entry of an interrupt handler"
> occasionnaly but apparently without damage on 1.03).

Try the SMP patch from Loic Prylli <Loic.Prylli@ens-lyon.fr>
   http://beowulf.gsfc.nasa.gov/linux/misc/smp-bug.html

>  Any chance that both are variations of the same 2.0.xx SMP kernel bug ?
> Shoudl I upgrade to 1.05 ? Should I try to increase the 
>   static int max_interrupt_work = 20;
> increase as suggested in a past mail ? 

Yes, upgrade if you use multicast.
You can increase the max_interrupt_work value when loading the module:
  echo "options eepro100 max_interrupt_work=40" >> /etc/conf.module

>  Our servers are all using the EEPro100 and that's the first time I see
> this, is it just bad luck of something related to some hardware setup ?
> I had pushed the machine under a double 100MBps ping flood without seeing
> the error which occured only when starting pushing the HTTP and AFS setup.

This is probably occuring because the machine is under high load.
If the machine doesn't have real-time responsibilities, increasing the work
permitted is safe.

Donald Becker					  becker@cesdis.gsfc.nasa.gov
USRA-CESDIS, Center of Excellence in Space Data and Information Sciences.
Code 930.5, Goddard Space Flight Center,  Greenbelt, MD.  20771
301-286-0882	     http://cesdis.gsfc.nasa.gov/people/becker/whoiam.html