linux-kernel - Re: [PATCH v2] timens: show clock symbolic names in /proc/pid/timens

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Message-ID: <20200416065648.GA801745@gmail.com>
Date:   Wed, 15 Apr 2020 23:56:48 -0700
From:   Andrei Vagin <avagin@...il.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michael Kerrisk <mtk.manpages@...il.com>
Cc:     linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Eric W . Biederman" <ebiederm@...ssion.com>,
        Dmitry Safonov <0x7f454c46@...il.com>
Subject: Re: [PATCH v2] timens: show clock symbolic names in
 /proc/pid/timens_offsets

On Sat, Apr 11, 2020 at 08:40:31AM -0700, Andrei Vagin wrote:
> Michael Kerrisk suggested to replace numeric clock IDs on symbolic
> names.
> 
> Now the content of these files looks like this:
> $ cat /proc/774/timens_offsets
> monotonic      864000         0
> boottime      1728000         0
> 
> For setting offsets, both representations of clocks can be used.
> 
> As for compatibility, it is acceptable to change things as long as
> userspace doesn't care. The format of timens_offsets files is very
> new and there are no userspace tools that rely on this format.
> 
> But three projects crun, util-linux and criu rely on the interface of
> setting time offsets and this is why we need to continue supporting the
> clock IDs in this case.
> 
> Fixes: 04a8682a71be ("fs/proc: Introduce /proc/pid/timens_offsets")
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Eric W. Biederman <ebiederm@...ssion.com>
> Cc: Dmitry Safonov <0x7f454c46@...il.com>
> Acked-by: Michael Kerrisk <mtk.manpages@...il.com>                                                                                                                                            

Thomas and Andrew, could you merge this patch? I am sorry, I used the
wrong subsystem prefix. Let me know if I need to send the third version
of this patch.

Thanks,
Andrei