> From: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> > Sent: Wednesday, April 8, 2020 12:24 PM > To: Dexuan Cui <decui@xxxxxxxxxxxxx> > > ... > > This should be doable but IMO this is not a very trivial > > effort, and I'm trying to avoid it since IMO Suspend-to-idle is not really > > useful in practice for a Linux VM on Hyper-V. :-) > > Well, to me it's equally (not) useful in all other cases :-) I think we > should Cc: linux-pm@xxxxxxxxxxxxxxx and someone will describe a real > world usecase to educate us, we'll then see if there is any Hyper-V > specifics. Maybe I should support Suspend-to-idle, anyway. :-) > >> In particular, why do we need to do > >> anything when we are not hibernating? > > > > Are you suggesting hv_vmbus should not suspend the vmbus devices at all > > in the case of Suspend-to-idle? > > That what we were doing prior to the hibernation series, right? AFAIU Yes. > suspend-to-idle is basically 'no processes are scheduled' mode but we > don't really need to do anything with devices. Got it. Let me try to make a patch to revert to the old behavior for Suspend-to-idle. Thanks, -- Dexuan
