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SubjectRe: [PATCH RFC V2 3/5] kvm hypervisor : Add two hypercalls to support pv-ticketlock
On 10/24/2011 07:20 PM, Srivatsa Vaddagiri wrote:
> * Avi Kivity<avi@redhat.com> [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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