Messages in this thread | | | From | Dexuan Cui <> | Subject | RE: [PATCH] Drivers: hv: vmbus: Disallow the freeze PM operation | Date | Wed, 8 Apr 2020 19:42:27 +0000 |
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> From: Vitaly Kuznetsov <vkuznets@redhat.com> > Sent: Wednesday, April 8, 2020 12:24 PM > To: Dexuan Cui <decui@microsoft.com> > > ... > > 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@vger.kernel.org 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
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