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

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Message-ID: <alpine.DEB.2.21.1804261053020.1584@nanos.tec.linutronix.de>
Date:   Thu, 26 Apr 2018 10:53:40 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        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>,
        Steven Rostedt <rostedt@...dmis.org>,
        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, Mike Galbraith <efault@....de>
Subject: Re: [tip:timers/urgent] Revert: Unify CLOCK_MONOTONIC and
 CLOCK_BOOTTIME

On Thu, 26 Apr 2018, Rafael J. Wysocki wrote:
> FWIW, here's a list of issues reported and narrowed down to the commit
> in question so far I could find:
> 
> * systemd kills daemons on resume, after >WatchdogSec seconds
>   of suspending (Genki Sky).  [Verified that that's because systemd uses
>   CLOCK_MONOTONIC and expects it to not include the suspend time.]
> 
> * systemd-journald misbehaves after resume:
>   systemd-journald[7266]: File /var/log/journal/016627c3c4784cd4812d4b7e96a34226/system.journal corrupted or uncleanly shut down, renaming and replacing.
>   (	Mike Galbraith).
> 
> * NetworkManager reports "networking disabled" and networking is broken
>   after resume 50% of the time (Pavel).  [May be because of systemd.]
> 
> * MATE desktop dims the display and starts the screensaver right after
>   system resume (Pavel).
> 
> * Full system hang during resume (me).  [May be due to systemd or NM or both.]
> 
> I'm not sure if all of the above can be connected to one specific thing (other
> than the fact that things get confused if they expect CLOCK_MONOTONIC to not
> include system suspend time).

Thanks for collecting the info. I'll amend the changelog with those.

Thanks,

	tglx