linux-kernel - Re: [tip:timers/urgent] Revert: Unify CLOCK_MONOTONIC and CLOCK

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Message-ID: <1818264.9sG3yaIMPm@aspire.rjw.lan>
Date:   Thu, 26 Apr 2018 08:48:00 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Mark Salyzyn <salyzyn@...roid.com>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        John Stultz <john.stultz@...aro.org>,
        Peter Anvin <hpa@...or.com>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        Prarit Bhargava <prarit@...hat.com>,
        Pavel Machek <pavel@....cz>, Kevin Easton <kevin@...rana.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Petr Mladek <pmladek@...e.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        SergeySenozhatsky <sergey.senozhatsky@...il.com>,
        Jonathan Corbet <corbet@....net>,
        linux-tip-commits@...r.kernel.org
Subject: Re: [tip:timers/urgent] Revert: Unify CLOCK_MONOTONIC and CLOCK_BOOTTIME

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@...ysocki.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