On Sat, May 15, 2010 at 4:51 PM, Rafael J. Wysocki <rjw@xxxxxxx> wrote: > On Saturday 15 May 2010, Brian Swetland wrote: >> The special device file will have filesystem permissions that limit >> access to system services. >> >> Arbitrary userspace apps do not have direct access to the device -- >> they use a service (provided by binder rpc), and the app must declare >> its intent (and the user accept this on install) in order to use that >> service. > > On Android, right? Yup -- other userspace environments may choose different ways to grant/deny access. At the bottom we gate it by having a group that processes which may access the device are part of (with the device node being 0660, etc). >> The service keeps track of usage stats so if a user >> experiences poor battery life they can look at the battery usage thing >> and see which apps are keeping the device awake, etc. > > That sounds like it should go into a doc or at least into the changelog of > patch [2/8] IMnsHO. > > The thing you said about timers in one of the previous messages should be > documented too, BTW, because it's one of the motivation factors for this > work. > > In general, I think the motivation is not explained sufficienty in the patches' > changelogs and that's one of the reasons why people have so many doubts about > the feature's usefulness. Seems reasonable -- I know Arve's working on making these a bit more verbose for you. Brian _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
