Re: [PATCH 1/9] KVM: add kvm_arch_sched_in

From: Radim KrÄmÃÅ
Date: Wed Aug 20 2014 - 08:57:16 EST


2014-08-20 09:47+0200, Christian Borntraeger:
> On 19/08/14 22:35, Radim KrÄmÃÅ wrote:
>
> > --- a/virt/kvm/kvm_main.c
> > +++ b/virt/kvm/kvm_main.c
> > @@ -3123,6 +3123,8 @@ static void kvm_sched_in(struct preempt_notifier *pn, int cpu)
> > if (vcpu->preempted)
> > vcpu->preempted = false;
> >
> > + kvm_arch_sched_in(vcpu, cpu);
> > +
> > kvm_arch_vcpu_load(vcpu, cpu);
> > }
> >
>
> Why cant you reuse kvm_arch_vcpu_load? Its also called on each sched_in and is architecture specific.

kvm_arch_vcpu_load is also called from kvm_vcpu_ioctl, so we'd be
shrinking unnecessarily.
(sched_in gives us a bit of useful information about the state of the
system, kvm_vcpu_ioctl not that much.)
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