linux-kernel - Re: [RFC/RFT patch 0/7] timekeeping: Unify clock MONOTONIC and clock BOOTTIME

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Message-ID: <20180313063630.zxebyb7gczeiovyf@gmail.com>
Date:   Tue, 13 Mar 2018 07:36:30 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        John Stultz <john.stultz@...aro.org>,
        Petr Mladek <pmladek@...e.com>,
        Mark Salyzyn <salyzyn@...roid.com>,
        Prarit Bhargava <prarit@...hat.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Kevin Easton <kevin@...rana.org>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        Jonathan Corbet <corbet@....net>
Subject: Re: [RFC/RFT patch 0/7] timekeeping: Unify clock MONOTONIC and clock
 BOOTTIME


* Linus Torvalds <torvalds@...ux-foundation.org> wrote:

> On Thu, Mar 1, 2018 at 8:33 AM, Thomas Gleixner <tglx@...utronix.de> wrote:
> >
> > This really needs lot of testing, documentation updates and more input from
> > userspace folks to make a final decision.
> 
> Honestly, I don't think we'd get the testing this kind of change needs
> except by just trying it.
> 
> I'm willing to merge this in the 4.17 merge window, with the
> understanding that if people end up reporting issues, we may just have
> to revert it all, and chalk it up to a learning experience - and add
> the appropriate commentary in the kernel code about exactly what it
> was that depended on that MONO/BOOT difference.
> 
> One non-technical thing I would ask: use some other word than
> "conflate". Maybe just "combine". Or better yet, "unify".

Ok, I have edited all the changelogs accordingly (and also flipped around the 
'clock MONOTONIC' language to the more readable 'the MONOTONIC clock' variant), 
the resulting titles are (in order):

 72199320d49d: timekeeping: Add the new CLOCK_MONOTONIC_ACTIVE clock
 d6ed449afdb3: timekeeping: Make the MONOTONIC clock behave like the BOOTTIME clock
 f2d6fdbfd238: Input: Evdev - unify MONOTONIC and BOOTTIME clock behavior
 d6c7270e913d: timekeeping: Remove boot time specific code
 7250a4047aa6: posix-timers: Unify MONOTONIC and BOOTTIME clock behavior
 127bfa5f4342: hrtimer: Unify MONOTONIC and BOOTTIME clock behavior
 92af4dcb4e1c: tracing: Unify the "boot" and "mono" tracing clocks

I'll push these out after testing.

Thanks,

	Ingo