Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for embedded systems

From	Andy Shevchenko <andy.shevchenko@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for embedded systems
Date	2017-04-04 20:10 +0200
Message-ID	<tsB3Z-8pK-41@gated-at.bofh.it> (permalink)
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On Tue, Apr 4, 2017 at 8:59 PM, Tom Zanussi <tom.zanussi@linux.intel.com> wrote:
> On Tue, 2017-04-04 at 20:08 +0300, Andy Shevchenko wrote:
>> On Tue, Apr 4, 2017 at 7:59 PM, Tom Zanussi <tom.zanussi@linux.intel.com> wrote:
>> > On Tue, 2017-04-04 at 00:05 +0300, Andy Shevchenko wrote:

>> > I was focused at that point mainly on the kernel static size, and using
>> > a combination of Josh Triplett's tinification tree, Andi Kleen's LTO and
>> > net-diet patches, and my own miscellaneous patches that I was planning
>> > on eventually upstreaming, I ended up with a system that I could boot to
>> > shell with a 455k text size:
>> >
>> > Memory: 235636K/245176K available (455K kernel code, 61K rwdata,
>> > 64K rodata, 132K init, 56K bss, 3056K reserved, 0K cma-reserved)

>> Thanks for sharing your experience. The question closer to this
>> discussion what did you do against TTY/UART/(related) layer(s)?
>>
>
> I'd have to go back and take a look, but nothing special AFIAR.
>
> No patches or hacks along those lines, and the only related thing I see
> as far as config is:
>
>         cfg/pty-disable.scc \
>
> which maps to:
>
>         # CONFIG_UNIX98_PTYS is not set

But on your guestimation how much can we squeeze TTY/UART layer if we
do some compile-time configuration?
Does it even make sense or better to introduce something like minitty
special layer instead?

I believe you did some research during time of that project…

-- 
With Best Regards,
Andy Shevchenko

Thread

[PATCH v2 0/5] minitty: a minimal TTY layer alternative for embedded systems Nicolas Pitre <nicolas.pitre@linaro.org> - 2017-04-02 00:40 +0200
  Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Andy Shevchenko <andy.shevchenko@gmail.com> - 2017-04-02 15:30 +0200
    Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Nicolas Pitre <nicolas.pitre@linaro.org> - 2017-04-02 18:00 +0200
      Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Alan Cox <alan@linux.intel.com> - 2017-04-03 15:00 +0200
        Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Nicolas Pitre <nicolas.pitre@linaro.org> - 2017-04-03 18:10 +0200
          Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Alan Cox <alan@linux.intel.com> - 2017-04-03 20:10 +0200
            Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Nicolas Pitre <nicolas.pitre@linaro.org> - 2017-04-03 22:00 +0200
              Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Alan Cox <alan@linux.intel.com> - 2017-04-04 15:50 +0200
                Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Nicolas Pitre <nicolas.pitre@linaro.org> - 2017-04-04 21:30 +0200
  Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for embedded systems Andi Kleen <andi@firstfloor.org> - 2017-04-02 22:50 +0200
    Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Nicolas Pitre <nicolas.pitre@linaro.org> - 2017-04-02 23:50 +0200
      Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Stuart Longland <stuartl@longlandclan.id.au> - 2017-04-03 01:00 +0200
        Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Nicolas Pitre <nicolas.pitre@linaro.org> - 2017-04-03 03:10 +0200
          Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Stuart Longland <stuartl@longlandclan.id.au> - 2017-04-04 02:50 +0200
        Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Geert Uytterhoeven <geert@linux-m68k.org> - 2017-04-03 20:20 +0200
          Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Rob Herring <robh@kernel.org> - 2017-04-03 21:00 +0200
            Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Geert Uytterhoeven <geert@linux-m68k.org> - 2017-04-03 21:50 +0200
          Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Andy Shevchenko <andy.shevchenko@gmail.com> - 2017-04-03 23:10 +0200
            Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Tom Zanussi <tom.zanussi@linux.intel.com> - 2017-04-04 19:00 +0200
              Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Andy Shevchenko <andy.shevchenko@gmail.com> - 2017-04-04 19:10 +0200
                Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Tom Zanussi <tom.zanussi@linux.intel.com> - 2017-04-04 20:00 +0200
                Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Andy Shevchenko <andy.shevchenko@gmail.com> - 2017-04-04 20:10 +0200
                Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Nicolas Pitre <nicolas.pitre@linaro.org> - 2017-04-04 20:40 +0200
                Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Tom Zanussi <tom.zanussi@linux.intel.com> - 2017-04-04 22:00 +0200
                Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Nicolas Pitre <nicolas.pitre@linaro.org> - 2017-04-04 22:30 +0200
              Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Nicolas Pitre <nicolas.pitre@linaro.org> - 2017-04-04 21:00 +0200
      Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Andy Shevchenko <andy.shevchenko@gmail.com> - 2017-04-03 10:00 +0200
        Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Andi Kleen <andi@firstfloor.org> - 2017-04-03 17:40 +0200
          Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Nicolas Pitre <nicolas.pitre@linaro.org> - 2017-04-03 19:30 +0200
          Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Adam Borowski <kilobyte@angband.pl> - 2017-04-03 22:00 +0200
            Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Nicolas Pitre <nicolas.pitre@linaro.org> - 2017-04-03 22:10 +0200
              Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Adam Borowski <kilobyte@angband.pl> - 2017-04-03 22:40 +0200
        Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Nicolas Pitre <nicolas.pitre@linaro.org> - 2017-04-03 18:50 +0200
  Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for  embedded systems Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-03 09:50 +0200

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