Re: irq balancing: performance disaster

["Martin J. Bligh" <mbligh@aracnet.com>]

>> > While tackling bug 699, it became clear to me that irq balancing is the cause 
>> > of the performance problems I, and all people using the SMP kernel Mandrake 
>> > 9.1 ships, are dealing with. I got the problems with 2.5.69 too. After 
>> > disabling irq balancing, the system is remarkably faster, and much more 
>> > responsive. 
>> > 
>> > For those interested in the issue, please look at bug 699.
>> 
>> Could you test out this patch from Keith Mannthey if you're having trouble?
>> It makes irq balance a config option, which makes it easier to disable.
>> Various people have requested it, but I don't have a box to test it on ;-(
>> Pulled out of -mjb tree, but should go onto mainline easily.
> 
> What's wrong with the noirqbalance parameter?

You have to add it ;-) Functionally equivalanet, just an easier method
for people who want to do such things in userspace for whatever reason.

M.