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    SubjectRe: [PATCH RFC 1/2] kvm vcpu: Note down pause loop exit
    Date
    On Wed, 11 Jul 2012 16:22:29 +0530, Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com> 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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