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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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