linux-kernel - Re: [PATCH 0/2] nohz: Deal with clock reprogram skipping issues v3

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Message-ID: <20170530054709.hth3myap4mq5zvcp@gmail.com>
Date:   Tue, 30 May 2017 07:47:09 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Frederic Weisbecker <fweisbec@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Rik van Riel <riel@...hat.com>,
        James Hartsock <hartsjc@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>, stable@...r.kernel.org,
        Tim Wright <tim@...bash.co.uk>, Pavel Machek <pavel@....cz>
Subject: Re: [PATCH 0/2] nohz: Deal with clock reprogram skipping issues v3


* Frederic Weisbecker <fweisbec@...il.com> wrote:

> > Well, this does not answer my question: between latest tip:timers/nohz and the 
> > patches you posted there's a delta, so it's not just a pure rebase.
> 
> Yeah but like I said, you can forget the series I posted because the diff is
> mostly cosmetic and things are actually ok as they are in tip:timers/nohz
> 
> The only thing that bothers me is the fact that the HEAD of this branch doesn't have
> a changelog or even just a comment.

We can still amend that - is this changelog what you had in mind:

  nohz: Reset next_tick cache even when the timer has no regs

  Handle tick interrupts whose regs are NULL, out of general paranoia. It happens 
  when hrtimer_interrupt() is called from non-interrupt contexts, such as hotplug
  CPU down events.

?

Or you can send me a longer version as well.

Thanks,

	Ingo