Re: [PATCH RFC V2 3/5] kvm hypervisor : Add two hypercalls to supportpv-ticketlock

[Raghavendra K T]

On 10/24/2011 07:20 PM, Srivatsa Vaddagiri wrote:
> * Avi Kivity<avi@xxxxxxxxxx>  [2011-10-24 15:09:25]:
>
> > > I guess with that change, we can also dropthe need for other hypercall
> > > introduced in this patch (kvm_pv_kick_cpu_op()). Essentially a vcpu sleeping
> > > because of HLT instruction can be woken up by a IPI issued by vcpu releasing a
> > > lock.
> >
> > Not if interrupts are disabled.
>
> Hmm yes ..so we need a kick hypercall then.

So then do also you foresee the need for directed yield at some point, 
to address LHP? provided we have good improvements to prove.

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