Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> writes: > On Fri, 20 Jul 2007, Jeremy Maitin-Shepard wrote: >> >> when doing a suspend-to-ram you get to a point where you just don't use >> >> any userspace. >> >> > What do you mean? How can you prevent user tasks from running? That's >> > basically what the freezer does, and the whole point of this approach >> > is to eliminate the freezer. Right? >> >> Presumably no tasks at all would be scheduled. > How would you prevent tasks from being scheduled? How would you > prevent drivers from deadlocking because in order to put their device > in a low-power state they need to acquire a lock which is held by a > user task? Perhaps this isn't an issue once the device is already quiesced. I'm just conjecturing. [snip] -- Jeremy Maitin-Shepard _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
