Re: [RFC/PATCH] PM / Sleep: Timer quiesce in freeze state

From: Peter Zijlstra
Date: Mon Oct 27 2014 - 03:29:19 EST


On Mon, Oct 27, 2014 at 02:27:27PM +0800, Li, Aubrey wrote:
> > Now I suppose the problem is with cpu_pause() which needs IPIs to
> > complete? Do we really need cpuidle_pause() there?
> > cpuidle_uninstall_handlers() seems like a daft thing to call just about
> > there.
>
> Please check the log of 8651f97bd951d0bb1c10fa24e3fa3455193f3548.
> Rafael should know more this question than me.

That changelog explains its complete bollocks to do it here. We _want_
to enter and/or remain in deep idle states.
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