Re: 2.6.20.3-rt8 - DMA suffers excessive delay periodically

Lee Revell wrote:

> John wrote:
> 
>> Would someone know how to disable SMM in this BIOS?
> 
> There's no generic way.

I understand. Would someone know how to disable SMM in the VIA Pro133T 
chipset (VT82C596B south bridge). What I/O ports do I need to write to, 
and what values should I write to these ports?

> Try disabling USB keyboard emulation and any unused peripherals.

I have disabled everything I could find in the BIOS. Serial and parallel 
ports, USB, integrated sound, APM, ACPI, booting from exotic hardware or 
from the network. To no avail :-(

> Also google "RTAI disable SMM".

I see that they have a Linux kernel module to disable SMM in Intel 
chipsets. But I didn't see the equivalent for VIA chipsets.

>>> Is this a laptop?  They are plagued with SMM problems...
>>
>> No it is an "indutrial" motherboard.
>> Although I don't know what makes it "industrial".
> 
> One would really hope that such a device would be designed for machine
> control and similar RT apps and thus free of SMM...

Indeed...

I wonder if VIA thinks their old chipsets were industrial-grade.

Regards.
-
To unsubscribe from this list: send the line "unsubscribe linux-apps" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html