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    SubjectRe: [PATCH] (Longhaul 1/5) PCI: Protect bus master DMA from Longhaul by rw semaphores
    Alan Cox wrote:
    > Ar Mer, 2006-06-28 am 20:25 +0200, ysgrifennodd Rafał Bilski:
    >> AUTOHALT, this means interrupts must be disabled except for the time tick,
    >> which should be reset to >=1ms. Care must be taken to avoid other system events
    >> that could interfere with this operation. A few examples are snooping, NMI,
    >> INIT, SMI and FLUSH."
    >
    > "snooping". So we do need the cache sorting out.
    >

    If I understand correctly, trouble occurs when the processor tries to
    snoop? Would disabling (via MSR) and flushing the caches before changing
    the frequency help in that case?

    Groeten,
    Bart

    --
    Bart Hartgers - TUE Eindhoven - http://plasimo.phys.tue.nl/bart/contact/
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