On 06/17/2010 01:43 PM, Alan Cox wrote: > On Thu, 17 Jun 2010 13:23:27 +0200 > Tejun Heo <tj@xxxxxxxxxx> wrote: > >> On 06/17/2010 01:12 PM, Thomas Gleixner wrote: >>>> Hmmm.... oh, I see. Wouldn't it be much better to use moving avg of >>>> IRQ durations instead of letting the driver specify it? Drivers are >>>> most likely to just hard code it and It's never gonna be accurate. >>> >>> Right, but that's probably more accurate than the core code heuristics >>> ever will be. >> >> Eh, not really. For ATA at least, there will be three different >> classes of devices. SSDs, hard drives and optical devices > > At least four: It may also be battery backed RAM. Yeah, right, there are those crazy devices too but I think they would fall in a single tick any way. At any rate, let's say I have those numbers, how would I feed it into c-state selection? Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
