On Tuesday, 17 July 2007 23:27, Jeremy Maitin-Shepard wrote: > david@xxxxxxx writes: > > [snip] > > >> How do you guarantee that no tasks are scheduled when you get back to the > >> hibernated kernel? > > > just don't schedule any userspace tasks. all you need to do is to execute the > > ACPI sleep functions. you normally do that after stopping userspace > > anyway. > > What does "stopping userspace" mean? You already said it does not mean > disabling interrupts. But using the freezer is also not an option, > since the avoidance of that is the main reason for the kexec approach in > the first place. > > [snip] > > >> Well, not exactly. If your battery runs out of power while you're suspended, > >> but you have the image saved, it's still better to restore from the image, > > even > >> if something may not work correctly after the restore, than to risk a loss of > >> data. > > > if things don't work correctly you are still risking the loss of data, the user > > just doesn't know it. > > It should be possible on any system to do a hibernate followed by a > shutdown (and then resume properly, without any problems). Thus, for > handling suspend to both, you resume as if the system had been shutdown, > rather than resuming as if the system came from S4. Exactly. Greetings, Rafael -- "Premature optimization is the root of all evil." - Donald Knuth _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
