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    SubjectRe: [Fdutils] DMA cache consistency bug introduced in 2.6.28
    > > Does pmqos work with apci=off etc.? 
    >
    > yes
    >
    > > I didn't think it shut down
    > > the classic "HLT" idle, does it?
    >
    > it does if you specify a latency of 0; it will then go into the
    > spin-only state until you give up your latency requirement

    I looked at it this evening, but it seems like pm_qos is not
    interrupt safe (e.g. calls blocking notifiers) and floppy currently does
    enable/disable_hlt from interrupts and bottom halves.

    Would need some more infrastructure work or restructuring
    of the floppy driver.

    -Andi
    --
    ak@linux.intel.com -- Speaking for myself only.


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