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Re: [PATCH RFC hack dont apply] intel_idle: support running within a VM

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On Sat, Sep 30, 2017 at 12:01 AM, Michael S. Tsirkin <mst@redhat.com> wrote:
> intel idle driver does not DTRT when running within a VM:
> when going into a deep power state, the right thing to
> do is to exit to hypervisor rather than to keep polling
> within guest using mwait.
>
> Currently the solution is just to exit to hypervisor each time we go
> idle - this is why kvm does not expose the mwait leaf to guests even
> when it allows guests to do mwait.
>
> But that's not ideal - it seems better to use the idle driver to guess
> when will the next interrupt arrive.

The idle driver alone is not sufficient for that, though.

Thanks,
Rafael

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[PATCH RFC hack dont apply] intel_idle: support running within a VM "Michael S. Tsirkin" <mst@redhat.com> - 2017-09-30 00:10 +0200
  Re: [PATCH RFC hack dont apply] intel_idle: support running within a VM "Rafael J. Wysocki" <rafael@kernel.org> - 2017-09-30 01:30 +0200
    Re: [PATCH RFC hack dont apply] intel_idle: support running within  a VM Jacob Pan <jacob.jun.pan@linux.intel.com> - 2017-10-02 22:50 +0200

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