On Sunday, 15 July 2007 14:58, Dr. David Alan Gilbert wrote: > * Rafael J. Wysocki (rjw@xxxxxxx) wrote: > > > (5) Hibernation should be transparent from the applications' point of view > > > > Generally, applications should not notice that hibernation took place. > > [Note that I don't regard all processes as applications and I think that > > there may be processes which need to handle the hibernation in a special > > way.] Ideally, for example, if some audio is being played when a > > hibernation starts, the audio player should be able to continue playing the > > same audio after the restore from the point in which it has been > > interrupted by the hibernation. Also, the CPU affinities and similar > > That would be _so_ embarrassing in a library; I'd rather the audio > player had the opportunity to consider whether restarting was a good idea. > > > (6) State of devices from before hibernation should be restored, if possible > > > > If possible, during a restore devices should be brought back to the same > > state in which they were before the corresponding hibernation. Of course > > in some situations it might be impossible to do that (eg. the user > > connected the hibernated system to a different IP subnet and then > > restored), but as a general rule, we should do our best to restore the > > state of devices, which is directly related to point (5) above. > > Or the user unplugs their flash drive after hibernation rather than before. > > Two things which I think would be nice to consider are: > 1) Encryption - I'd actually prefer if my luks device did not > remember the key accross a hibernation; I want to be forced to > reenter the phrase. However I don't know what the best thing > to do to partitions/applications using the luks device is. Encryption is possible with both the userland hibernation (aka uswsusp) and TuxOnIce (formerly known as suspend2). Still, I don't consider it as a "must have" feature for a framework to be generally useful (many users don't use it anyway). > 2) Some level of debugging needs to be available so that users can > provide something so you can see why something hasn't hibernated > or why (as in the case of this tosh laptop) it still takes power > during hibernation. I agree. 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
