Messages in this thread | | | Date | Sat, 26 Dec 2009 17:40:29 +0100 | From | Andi Kleen <> | Subject | Re: [Fdutils] DMA cache consistency bug introduced in 2.6.28 |
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> > 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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