On Wednesday 27 May 2009, Oliver Neukum wrote: > Am Dienstag, 26. Mai 2009 00:58:53 schrieb Rafael J. Wysocki: > > > No, I am afraid it is not. The average user has no clue. Even if that > > > is not the problem, the user never knows for sure he has encountered > > > the worst case. > > > > OK there, but surely it's better to have a sysfs attribute than a fixed > > value? > > Maybe I should have been more verbose. > > A tunable setting is a race condition in itself. The right amount depends > on the drivers loaded and the devices attached and possibly on the status > of devices. Nothing of this can be determined statically. > > You want hibernation to work even if the user has plugged in a new device. > You have to calculate that amount in kernel space. In practice, though, the drivers don't usually tell us in advance how much memory they are going to need and I believe the only way they could do that would be by allocating the memory from a hibernation notifier. So, until the drivers start to use hibernation (and suspend for that matter) notifiers, we need workarounds. Best, Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
