Subject: Re: [RFC][PATCH] kvm: add suspend pm-notifier

From: Sergey Senozhatsky <[email-masked]>
Date: Fri, 4 Jun 2021 18:22:02 +0900

On (21/06/04 09:24), Paolo Bonzini wrote:
> On 04/06/21 09:21, Vitaly Kuznetsov wrote:
> > >   	preempt_notifier_inc();
> > > +	kvm_init_pm_notifier(kvm);
> > You've probably thought it through and I didn't but wouldn't it be
> > easier to have one global pm_notifier call for KVM which would go
> > through the list of VMs instead of registering/deregistering a
> > pm_notifier call for every created/destroyed VM?
> 
> That raises questions on the locking, i.e. if we can we take the kvm_lock
> safely from the notifier.

Right, I wanted to take the VM lock, rather than subsystem lock
(kvm_lock).

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