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

From Rik van Riel <riel@redhat.com>
Newsgroups linux.kernel
Subject Re: [PATCH 2/2] tick: Make sure tick timer is active when bypassing reprogramming
Date 2017-04-20 18:10 +0200
Message-ID <tymOB-2ES-1@gated-at.bofh.it> (permalink)
References <tymlz-2fX-3@gated-at.bofh.it> <tymlA-2fX-19@gated-at.bofh.it>
Organization Red Hat, Inc

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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@gmail.com>
> Cc: Tim Wright <tim@binbash.co.uk>
> Cc: Pavel Machek <pavel@ucw.cz>
> Cc: James Hartsock <hartsjc@redhat.com>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Rik van Riel <riel@redhat.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Ingo Molnar <mingo@kernel.org>

Acked-by: Rik van Riel <riel@redhat.com>

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Thread

[PATCH 0/2] nohz: Deal with clock reprogram skipping issues Frederic Weisbecker <fweisbec@gmail.com> - 2017-04-20 17:40 +0200
  [PATCH 2/2] tick: Make sure tick timer is active when bypassing reprogramming Frederic Weisbecker <fweisbec@gmail.com> - 2017-04-20 17:40 +0200
    Re: [PATCH 2/2] tick: Make sure tick timer is active when bypassing  reprogramming Rik van Riel <riel@redhat.com> - 2017-04-20 18:10 +0200
    Re: [PATCH 2/2] tick: Make sure tick timer is active when bypassing  reprogramming Thomas Gleixner <tglx@linutronix.de> - 2017-04-20 20:00 +0200
      Re: [PATCH 2/2] tick: Make sure tick timer is active when bypassing  reprogramming Frederic Weisbecker <fweisbec@gmail.com> - 2017-04-20 20:30 +0200
        Re: [PATCH 2/2] tick: Make sure tick timer is active when bypassing  reprogramming Thomas Gleixner <tglx@linutronix.de> - 2017-04-20 21:50 +0200
          Re: [PATCH 2/2] tick: Make sure tick timer is active when bypassing  reprogramming Frederic Weisbecker <fweisbec@gmail.com> - 2017-04-21 01:30 +0200

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