On Wed, 29 May 2019, Josh Poimboeuf wrote: > I still have the question about whether we could make mwait_play_dead() > monitor a fixed address. If we could get that to work, that seems more > robust to me.
Hmm, does it really? That'd mean the resumer and resumee must have the same fixmap. How are you going to guarantee that? Currently the resuming kernel doesn't really have to be the same as the one that is being resumed. > Another question. With your patch, if booted with nosmt, is SMT still > disabled after you resume from hibernation? Yup, it is. > I don't see how SMT would get disabled again. The target kernel only onlines the CPUs which were online at the time of hibernation (and are therefore in frozen_cpus mask). -- Jiri Kosina SUSE Labs
