linux-kernel - Re: [PATCH v2 01/21] lib/vsprintf: Print time and date in human readable format via %pt

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Date:   Thu, 22 Feb 2018 14:46:44 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Rasmus Villemoes <rasmus.villemoes@...vas.dk>,
        Joe Perches <joe@...ches.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        linux-rtc@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Mark Salyzyn <salyzyn@...roid.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Guan Xuetao <gxt@...c.pku.edu.cn>,
        Ingo Molnar <mingo@...nel.org>,
        Jason Wessel <jason.wessel@...driver.com>,
        Jonathan Corbet <corbet@....net>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Thierry Reding <thierry.reding@...il.com>
Subject: Re: [PATCH v2 01/21] lib/vsprintf: Print time and date in human
 readable format via %pt

On Wed, 2018-02-21 at 15:19 +0100, Geert Uytterhoeven wrote:
> On Wed, Feb 21, 2018 at 2:23 PM, Andy Shevchenko
> <andriy.shevchenko@...ux.intel.com> wrote:
> > On Wed, 2018-02-21 at 08:38 +0100, Rasmus Villemoes wrote:
> > > On 2018-02-21 00:55, Joe Perches wrote:

> > > Well, on the one hand, I like to reduce the size of the kernel
> > > when
> > > possible and ideally make all new functionality guarded by config
> > > options, but OTOH, how much does compiling out the datetime
> > > formatters
> > > really save?
> > 
> > https://lists.01.org/pipermail/kbuild-all/2017-June/034950.html
> > 
> > I understand that half a year time allows us to increase kernel text
> > size by 750+ bytes unconditionally.
> > 
> > I would really like to not use any option.
> 
> Agreed.
> 
> FTR, growth of my atari_defconfig kernel between v4.7 and v4.15:
> 
> add/remove: 351/155 grow/shrink: 691/429 up/down: 63095/-38665 (24430)
> add/remove: 394/156 grow/shrink: 595/709 up/down: 61173/-31092 (30081)
> add/remove: 1315/711 grow/shrink: 1269/442 up/down: 172871/-92075
> (80796)
> add/remove: 525/266 grow/shrink: 914/510 up/down: 116115/-46240
> (69875)
> add/remove: 443/222 grow/shrink: 906/456 up/down: 77807/-40657 (37150)
> add/remove: 536/296 grow/shrink: 1043/652 up/down: 97366/-65459
> (31907)
> add/remove: 413/176 grow/shrink: 711/479 up/down: 75678/-41356 (34322)
> add/remove: 311/145 grow/shrink: 898/438 up/down: 51655/-26851 (24804)

The concern was emitted from one who cares about tiny config, i.e.
i386_tiny_defconfig.

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy