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Re: [PATCH 2/2] tick: Make sure tick timer is active when bypassing reprogramming




On Thu, 2017-04-20 at 17:30 +0200, Frederic Weisbecker wrote:
> So far we have run into too much troubles with the optimization path
> that skips reprogramming the clock on IRQ exit when the expiration
> deadline hasn't changed. If by accident the cached deadline happens
> to
> be out of sync with the hardware deadline, the buggy result and its
> cause are hard to investigate. So lets detect and warn about the
> issue
> early.
> 
> Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
> Cc: Tim Wright <tim@xxxxxxxxxxxxx>
> Cc: Pavel Machek <pavel@xxxxxx>
> Cc: James Hartsock <hartsjc@xxxxxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: Rik van Riel <riel@xxxxxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>

Acked-by: Rik van Riel <riel@xxxxxxxxxx>