On 05/31/2013 04:03 PM, John Candlish wrote:
> Thank you for you timely reply. I'll check again with another of the same
> computer+bios as well as a core2 ICH7 machine.
>
> I should mention that the particular machine tested does respond to the
> rtai_smi.ko module, in that the presence of that module significantly
> reduces (eliminates actually) the periodic smi latencies.
>
> It is curious. I'll look again.
Well, the RTAI module does not check if clearing the SMI bit actually
work, this was added later in Xenomai. So, I would say the result is the
same, only you do not see it.
Another difference is that the RTAI module does not do the
"pci_device_put" right away, which prevents loading other kernel modules
which would like to request the LPC PCI device. I doubt that could make
a difference though.
--
Gilles.
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