On Sun, 2007-07-22 at 10:26 -0700, Arjan van de Ven wrote: > On Sat, 2007-07-21 at 23:49 -0700, [EMAIL PROTECTED] wrote: > > > this approach would allow the transition of ALL drivers to the new mode of > > operation in one fell swoop, and then adding additional power management > > features is just adding to the existing list rather then implementing new > > functions. > > > I have a concern with this approach though. It seems to assume that > there is one global thing somewhere that sets the system state; in my > experience that is the wrong approach; in fact there is a very definite > evidence that there are many decisions on power that are to be made > local at a high frequency. An example of this is the processor speed; > the ondemand governer does exactly this for the cpus that can switch > speeds fast; it's just impossible to beat such a local, fast decision > with anything on a global scale. > > On the other hand, some things (the high level goals and constraints) > are obviously global.
I think we need a set of constraints that trickle down the power tree and limit what a given driver can do locally. Ben. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
