Re: [tip:timers/urgent] Revert: Unify CLOCK_MONOTONIC and CLOCK_BOOTTIME

From: Thomas Gleixner <tglx@linutronix.de>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Salyzyn <salyzyn@android.com>,
	Ingo Molnar <mingo@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	John Stultz <john.stultz@linaro.org>, Peter Anvin <hpa@zytor.com>,
	Michael Kerrisk <mtk.manpages@gmail.com>,
	Prarit Bhargava <prarit@redhat.com>,
	Steven Rostedt <rostedt@goodmis.org>, Pavel Machek <pavel@ucw.cz>,
	Kevin Easton <kevin@guarana.org>,
	Dmitry Torokhov <dmitry.torokhov@gmail.com>,
	Petr Mladek <pmladek@suse.com>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	SergeySenozhatsky <sergey.senozhatsky@gmail.com>,
	Jonathan Corbet <corbet@lwn.net>,
	linux-tip-commits@vger.kernel.org
Subject: Re: [tip:timers/urgent] Revert: Unify CLOCK_MONOTONIC and CLOCK_BOOTTIME
Date: Wed, 25 Apr 2018 21:09:29 +0200 (CEST)	[thread overview]
Message-ID: <alpine.DEB.2.21.1804252108280.1589@nanos.tec.linutronix.de> (raw)
In-Reply-To: <CA+55aFypQ0aMSO7T0hxN2YCvckSLZh6BMTuz185TyJZ69jRUrg@mail.gmail.com>

On Wed, 25 Apr 2018, Linus Torvalds wrote:
> On Wed, Apr 25, 2018 at 6:45 AM, tip-bot for Thomas Gleixner
> <tipbot@zytor.com> wrote:
> >
> > As stated in the pull request for the unification of CLOCK_MONOTONIC and
> > CLOCK_BOOTTIME, it was clear that we might have to revert the change.
> 
> I'm ok with the revert., but I do want the revert message to talk
> about *exactly* what broke.
> 
> I don't see the reported watchdog things, and I run systemd and I ran
> these patches.

With suspend/resume?

> So it's not just "systemd uses this for a watchdog". It must be
> something specific that made it trigger for some people and not
> others, and it's that specific thing that we should document so that
> we know why this simplification failed.

Fair enough. Do the reporters have more information or do I have to chase
it down myself?

Thanks,

	tglx