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SubjectRe: 2.6.20.3-rt8 - DMA suffers excessive delay periodically
> No it is an "indutrial" motherboard.
> Although I don't know what makes it "industrial".
>
> Regards.
>
> Is this related to SMM?
>
> As far as I can tell, the BIOS is Phoenix AwardBIOS v6.00PG.
>
> Would someone know how to disable SMM in this BIOS?

Usually you cannot disable SMM via the BIOS. You have to write chipset
specific Kernel code for that.

By example, a module exist in RTAI's code base for Intel Chipset.

You can assess your system's latencies using the -rt kernel calibration
tools, located in Ingo Molnar's repository.

Here is an introduction to SMI :
http://www.securityfocus.com/columnists/402

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