linux-kernel - Re: [RFC][PATCH 2/2] time: alarmtimer: Use TASK

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Message-ID: <CAOf5uw=3c33qXh+aa5V2OPktNBzvQHiAaLW56XAv1NG72d3q-A@mail.gmail.com>
Date: Mon, 15 Jul 2024 10:20:34 +0200
From: Michael Nazzareno Trimarchi <michael@...rulasolutions.com>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>, John Stultz <jstultz@...gle.com>, 
	LKML <linux-kernel@...r.kernel.org>, Stephen Boyd <sboyd@...nel.org>, 
	Arnd Bergmann <arnd@...db.de>, Michael <michael@...isi.de>, kernel-team@...roid.com, 
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [RFC][PATCH 2/2] time: alarmtimer: Use TASK_FREEZABLE to cleanup
 freezer handling

Hi Thomas

On Sat, Jul 13, 2024 at 12:47 PM Thomas Gleixner <tglx@...utronix.de> wrote:
>
> Michael!
>
> On Thu, Jun 27 2024 at 09:46, Michael Nazzareno Trimarchi wrote:
> > On Thu, Mar 2, 2023 at 11:58 PM Thomas Gleixner <tglx@...utronix.de> wrote:
> >> >> This appears to be still somewhat racy, because the notifier can run
> >> >> at this point AFAICS.
> >> >
> >> > Indeed it is. Let me think more about this.
> >>
> >> All of this is inherently racy as there is zero feedback whether the
> >> event has been consumed or not. Making this feedback based is not
> >> necessarily trivial, but let me stare into that.
> >>
> > Sorry to come back on this topic but I would like to know, if we can
> > find a way to be sure
> > to not lost wakeup or if you have already addressed in some series
>
> No. I did not take care of it as I got distracted with other important
> stuff. Feel free to take up the loose ends of this thread and make it
> work. I'm happy to help discussing design choices.
>

I will pick it up this week, and see what I can do and propose some way.

Thank you for having time to reply

Michael

> Thanks,
>
>         tglx



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Michael Nazzareno Trimarchi
Co-Founder & Chief Executive Officer
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michael@...rulasolutions.com
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