Re: [PATCH 1/1] locking/qspinlock/x86: Avoid test-and-set when PV_DEDICATED is set

[Eduardo Valentin]

Hello Peter,
On Tue, Oct 24, 2017 at 10:13:45AM +0200, Peter Zijlstra wrote:
> On Mon, Oct 23, 2017 at 05:44:27PM -0700, Eduardo Valentin wrote:
> > @@ -46,6 +48,8 @@ static inline bool virt_spin_lock(struct qspinlock *lock)
> >  	if (!static_cpu_has(X86_FEATURE_HYPERVISOR))
> >  		return false;
> >  
> > +	if (kvm_para_has_feature(KVM_FEATURE_PV_DEDICATED))
> > +		return false;
> >  	/*
> >  	 * On hypervisors without PARAVIRT_SPINLOCKS support we fall
> >  	 * back to a Test-and-Set spinlock, because fair locks have
> 
> This does not apply. Much has been changed here recently.
> 

 I checked against Linus master branch before sending. Which tree/branch are you referring to / should I based this?

-- 
All the best,
Eduardo Valentin