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

From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	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>, Pavel Machek <pavel@ucw.cz>,
	Kevin Easton <kevin@guarana.org>,
	Dmitry Torokhov <dmitry.torokhov@gmail.com>,
	Petr Mladek <pmladek@suse.com>,
	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: Thu, 26 Apr 2018 08:48:00 +0200	[thread overview]
Message-ID: <1818264.9sG3yaIMPm@aspire.rjw.lan> (raw)
In-Reply-To: <20180425184140.6b6e524d@vmware.local.home>

On Thursday, April 26, 2018 12:41:40 AM CEST Steven Rostedt wrote:
> On Wed, 25 Apr 2018 22:57:12 +0200
> "Rafael J. Wysocki" <rjw@rjwysocki.net> wrote:
> 
> > FWIW, I run (64-bit) OpenSUSE 42.3 on the failing machine (Acer Aspire S5) with
> > my own kernel (custom config based on the distro one).
> > 
> > The problem here is that the machine doesn't resume from S2R.  It appears to
> > just hang somewhere around where we return to user space.  However, to trigger
> > the issue it needs to stay in suspend for several minutes (not sure how many
> > exactly).  If it is just back-to-back suspend/resume, it will resume correctly.
> 
> I guess the question that needs to be asked is, have you tried a kernel
> with this commit reverted and it works?

Yes, I have.

> I'd play a bit going back and
> forth between two kernels, one with the commit and one without and no
> other differences, to make sure that is indeed the problem commit.

I've done that.

It is the problem commit.

Thanks,
Rafael