On Mon, May 17, 2010 at 11:12 AM, Felipe Balbi <me@xxxxxxxxxxxxxxx> wrote: > >> The technical reason for wanting suspend blockers (as has been stated >> more times than I can be bothered to go back and count) is that no-one >> can currently produce a working model for race free kernel to user work >> handoff and, in the face of open app stores, rogue applications are a >> significant problem. The fact that suspend blockers enables easy >> identification of power hogging apps is just a very useful side effect. > > I still can't get over the fact that suspend_blockers are dealing with > userland problems in kernel space. If we can't really trust apps, I'm > sorry but companies like Google and Nokia (which I work for) will have > to setup better application acceptance on their stores. We (Google) would like to allow completely open app distribution with minimal hurdles, and avoid the walled garden approach. Toward this goal we're not even requiring the use of a central app store for distribution. Obviously, given the ability to run *any* app, users will run into bad (or perhaps just less-than-optimal-powerwise) apps. Being able to provide the best possible battery life (in spite of sometimes-nonoptimal userspace apps) and simultaneously informing users about which apps are better/worse for their battery life is a goal here. > IMO we should be celebrating good apps, not dealing in kernel space with > bad ones. And on top of all that, we would still need custom > applications with suspend_blockers support built into them. For a large majority of apps, running in the background while the device is asleep (screen off) is not essential, they don't request the "keep device awake" permission, never hold a wakelock, etc. Those that do need to do this have the permission, may hold suspend blockers, and are accounted for. Unrelated to apps, the ability to say "please enter suspend as soon as there's no more work (kernel or userspace) preventing it", in a simple, non-racy way is useful. Brian _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
