On Fri, 13 Jul 2007, Rafael J. Wysocki wrote: > Okay, I have thought it through and I think that, as an initial step, we can > do > something like this: > > - preload the image-saving kernel before hibernation > - in the hibernation code path replace device_suspend() with the shutting > down of > all devices without unregistering them (not very nice, but should be > sufficient > for a while) > - when we've called device_power_down() and save_processor_state(), jump to > the image-saving kernel and let it run > - make the image-saving kernel set up everything, save the image without > starting any user space (we may use the existing image-saving code for this > purpose, with some modifications) and power off the system (or make it enter > S4) > - use the existing restoration code to load the image and jump to the > hibernated kernel > - in the restore code patch replace device_resume() with the reprobing of all > devices. > > Comments?
I doubt that re-probing devices will work. The probe routine won't expect there to be any registered children, so it will try to re-register them. On the other hand, post_restore methods could be written to expect something like this. Alan Stern - 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/
