Hi. On Thu, 2005-03-24 at 06:02, David Brownell wrote: > On Tuesday 22 March 2005 5:17 pm, Patrick Mochel wrote: > > > > We just need a > > simple mechanism for parents to monitor the power state of their children. > > Can't be that hard to come up with something clean. > > Minimally they can walk the list of their children at appropriate moments. > I think folk have also raised the notion of having a "child state changed" > call to the parent; it's not clear to me that needs to involve the PM core. Yes. The children should notify the parent, not the parent poll the children. Polling is ugly :> On top of this, the evaluation of the state of the children should be atomic. Thus, their notifications of idleness might simply atomically increment/decrement a counter of the number of children busy, for example. Regards. Nigel -- Nigel Cunningham Software Engineer, Canberra, Australia http://www.cyclades.com Bus: +61 (2) 6291 9554; Hme: +61 (2) 6292 8028; Mob: +61 (417) 100 574 Maintainer of Suspend2 Kernel Patches http://suspend2.net
