2014-08-21 10:26+0200, Paolo Bonzini:
> Il 20/08/2014 22:53, Radim Krčmář ha scritto:
> > +static int __shrink_ple_window(int val, int shrinker, int minimum)
>
> s/shrinker/factor/ or s/shrinker/param/ (shrinker has another meaning in
> the kernel).
True, thanks.
> > +{
> > + if (shrinker < 1)
> > + return ple_window;
> > +
> > + if (shrinker < ple_window)
> > + val /= shrinker;
> > + else
> > + val -= shrinker;
> > +
> > + return max(val, minimum);
>
> Any reason to use anything but ple_window as the minimum, even in
> update_ple_window_actual_max?
ple_window_actual_max needs to be one grow below the ple_window_max, so
it can be lower than ple_window.
> > +}
> > +
> > +static void modify_ple_window(struct kvm_vcpu *vcpu, int grow)
> > +{
> > + struct vcpu_vmx *vmx = to_vmx(vcpu);
> > + int new;
> > +
> > + if (grow)
> > + new = __grow_ple_window(vmx->ple_window);
> > + else
> > + new = __shrink_ple_window(vmx->ple_window, ple_window_shrink,
> > + ple_window);
> > +
> > + vmx->ple_window = max(new, ple_window);
> > +}
> > +#define grow_ple_window(vcpu) modify_ple_window(vcpu, 1)
> > +#define shrink_ple_window(vcpu) modify_ple_window(vcpu, 0)
>
> No macros please. :)
Guity as charged.
Using 0/1 or true/false in this context directly would be pretty bad ...
Is enum fine? (SHIRINK_PLE_WINDOW, GROW_PLE_WINDOW?)
(I can always make it into function pointers ;)
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