Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: Hibernation considerations | Date | Tue, 17 Jul 2007 23:40:21 +0200 |
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On Tuesday, 17 July 2007 23:06, david@lang.hm wrote: > On Tue, 17 Jul 2007, Jeremy Maitin-Shepard wrote: > > > david@lang.hm writes: > > > > [snip] > > > >>>> * figure out which devices can wake up > >>>> * put devices into low power states (wake-up devices are placed in the Dx > >>>> states compatible with the wake capability, the others are powered off) > > > >> this can't be done by the image-saving kernel if that kernel doesn't know about > >> the device. > > > > The image-saving kernel can be made to know about all of the "wake up" > > devices; all other devices should have already been powered off by the > > "hibernated" kernel. > > not nessasarily.
More than that. The hibernated kernel should not power off any devices, because that is _wasteful_ (unless, of course, the powering off a device is the only way to quiesce it).
Greetings, Rafael
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