Re: 2.6.20.3-rt8 - DMA suffers excessive delay periodically

[John]

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-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/