Re: [PATCH RFC 1/2] kvm vcpu: Note down pause loop exit

[Nikunj A Dadhania]

On Wed, 11 Jul 2012 16:22:29 +0530, Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx> wrote:
> On 07/11/2012 02:23 PM, Avi Kivity wrote:
> >
> > This adds some tiny overhead to vcpu entry.  You could remove it by
> > using the vcpu->requests mechanism to clear the flag, since
> > vcpu->requests is already checked on every entry.
> 
> So IIUC,  let's have request bit for indicating PLE,
> 
> pause_interception() /handle_pause()
> {
>   make_request(PLE_REQUEST)
>   vcpu_on_spin()
> 
> }
> 
> check_eligibility()
>   {
>   !test_request(PLE_REQUEST) || ( test_request(PLE_REQUEST)  && 
> dy_eligible())
> .
> .
> }
> 
> vcpu_run()
> {
> 
> check_request(PLE_REQUEST)
>
I know check_request will clear PLE_REQUEST, but you just need a
clear_request here, right?


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