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SubjectRe: libata/sata_nv latency on NVIDIA CK804 [was Re: AMD64 X2 lost ticks on PM timer]
Ingo Molnar wrote:
> so my guess would be that this device doesnt do MMIO, and the PIO inb()
> causes some bad BIOS-based SMM handler/emulator to trigger, which takes
> 16.6 msecs. If indeed the device is not in MMIO mode, is there a way to
> force it into MMIO mode, to test this theory?

Yes, but that carries with it an entirely new programming set, to use

Not like NICs, where you can just point it at another PCI BAR.


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