linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Arnd Bergmann <arnd@arndb.de>
To: Saravana Kannan <saravanak@google.com>
Cc: Olof Johansson <olof@lixom.net>,
	Will McVicker <willmcvicker@google.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
	Russell King <linux@armlinux.org.uk>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	Michael Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@kernel.org>,
	Sylwester Nawrocki <s.nawrocki@samsung.com>,
	Tomasz Figa <tomasz.figa@gmail.com>,
	Chanwoo Choi <cw00.choi@samsung.com>,
	Linus Walleij <linus.walleij@linaro.org>,
	Alessandro Zummo <a.zummo@towertech.it>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	John Stultz <john.stultz@linaro.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Lee Jones <lee.jones@linaro.org>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	"Cc: Android Kernel" <kernel-team@android.com>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-samsung-soc <linux-samsung-soc@vger.kernel.org>,
	linux-clk <linux-clk@vger.kernel.org>,
	"open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
	linux-rtc@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>
Subject: Re: [PATCH v2 00/12] arm64: Kconfig: Update ARCH_EXYNOS select configs
Date: Fri, 1 Oct 2021 14:00:47 +0200	[thread overview]
Message-ID: <CAK8P3a1HtDoEDeqs42s1hDzCZMwU7MhudJ7TVONn6TjoijaWRw@mail.gmail.com> (raw)
In-Reply-To: <CAGETcx_k2-mo9oUcYhsXhhsazLdwbifjP7ZT8pvyEbWB5k_qQg@mail.gmail.com>

On Fri, Oct 1, 2021 at 8:02 AM Saravana Kannan <saravanak@google.com> wrote:

> > A much more valuable approach would be to work towards being able to
> > free up memory by un-probed drivers at the end of boot. That would
> > possibly benefit all platforms on all architectures.
>
> Sure it would help memory after boot, but it won't help with size on
> "disk", kernel load time, etc. And some of the devices have very tight
> boot requirements. Think battery operated outdoor cameras for example.

I think we can draw a clear line (or several lines) between devices that boot
from strictly constrained NOR flash and those that run a platform-independent
kernel.

Also, when I look at a distro kernel, I see over 5000 kernel modules that
need to be stored on disk, but only a small fraction of those are platform
specific while most are for general-purpose pluggable devices, network
features or file systems that could be used on any system.

The vmlinux file is clearly too big and includes too much stuff that should
be in loadable modules, but I'm not really that worried about disk space
for the platform specific code.

         Arnd

  parent reply	other threads:[~2021-10-01 12:01 UTC|newest]

Thread overview: 83+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-28 23:56 [PATCH v2 00/12] arm64: Kconfig: Update ARCH_EXYNOS select configs Will McVicker
2021-09-28 23:56 ` [PATCH v2 01/12] arm64: don't have ARCH_EXYNOS select EXYNOS_CHIPID Will McVicker
2021-09-29 13:58   ` (subset) " Krzysztof Kozlowski
2021-09-29 14:00   ` Krzysztof Kozlowski
2021-09-28 23:56 ` [PATCH v2 02/12] timekeeping: add API for getting timekeeping_suspended Will McVicker
2021-09-29  3:42   ` John Stultz
2021-09-29 20:01     ` Will McVicker
2021-09-29 20:46       ` John Stultz
2021-09-30 18:31         ` Will McVicker
2021-09-28 23:56 ` [PATCH v2 03/12] clk: samsung: add support for CPU clocks Will McVicker
2021-09-28 23:56 ` [PATCH v2 04/12] clk: samsung: exynos5433: update apollo and atlas clock probing Will McVicker
2021-09-28 23:56 ` [PATCH v2 05/12] clk: export __clk_lookup Will McVicker
2021-10-08  4:31   ` Stephen Boyd
2021-09-28 23:56 ` [PATCH v2 06/12] clk: samsung: modularize exynos arm64 clk drivers Will McVicker
2021-09-28 23:56 ` [PATCH v2 07/12] clk: samsung: set exynos arm64 clk driver as tristate Will McVicker
2021-09-29 13:09   ` Krzysztof Kozlowski
2021-09-28 23:56 ` [PATCH v2 08/12] pinctrl: samsung: modularize the ARM and ARM64 pinctrls Will McVicker
2021-09-29  2:01   ` Chanho Park
2021-09-28 23:56 ` [PATCH v2 09/12] pinctrl: samsung: set PINCTRL_EXYNOS and PINCTRL_SAMSUNG as tristate Will McVicker
2021-09-28 23:56 ` [PATCH v2 10/12] soc: samsung: pmu: modularize the Exynos ARMv8 PMU driver Will McVicker
2021-09-29 13:11   ` Krzysztof Kozlowski
2021-09-28 23:56 ` [PATCH v2 11/12] soc: samsung: pm_domains: modularize EXYNOS_PM_DOMAINS Will McVicker
2021-09-29 13:36   ` Krzysztof Kozlowski
2021-09-28 23:56 ` [PATCH v2 12/12] ARM: rtc: remove HAVE_S3C_RTC in favor of direct dependencies Will McVicker
2021-09-29 11:52   ` Alexandre Belloni
2021-09-29 13:02 ` [PATCH v2 00/12] arm64: Kconfig: Update ARCH_EXYNOS select configs Krzysztof Kozlowski
2021-09-29 19:48   ` Will McVicker
2021-09-30  6:14     ` Krzysztof Kozlowski
2021-09-30  9:01       ` Arnd Bergmann
2021-09-30  9:30         ` Lee Jones
2021-09-30 10:33           ` Krzysztof Kozlowski
2021-09-30 12:34             ` Lee Jones
2021-09-30 12:38               ` Krzysztof Kozlowski
2021-09-30 10:05         ` Geert Uytterhoeven
2021-09-30  9:23       ` Lee Jones
2021-09-30 10:17         ` Geert Uytterhoeven
2021-09-30 10:56           ` Lee Jones
2021-09-30 11:25             ` Geert Uytterhoeven
2021-09-30 12:08               ` Lee Jones
2021-09-30 16:09                 ` Geert Uytterhoeven
2021-09-30 10:52         ` Krzysztof Kozlowski
2021-09-30 12:32           ` Lee Jones
2021-09-30 11:01         ` Tomasz Figa
2021-09-30 11:27           ` Geert Uytterhoeven
2021-09-30 11:51           ` Lee Jones
2021-09-30 12:10             ` Tomasz Figa
2021-09-30 12:15               ` Krzysztof Kozlowski
2021-09-30 12:45               ` Lee Jones
2021-10-01  4:01               ` Christoph Hellwig
2021-10-01  4:52                 ` Saravana Kannan
2021-10-01  4:55                   ` Christoph Hellwig
2021-09-30 12:21         ` Krzysztof Kozlowski
2021-09-30 12:39           ` Lee Jones
2021-09-30 13:08             ` Krzysztof Kozlowski
2021-09-30 13:29               ` Lee Jones
2021-09-30 16:12                 ` Geert Uytterhoeven
2021-09-30 16:21                   ` Lee Jones
2021-09-30 16:26                     ` Geert Uytterhoeven
2021-09-30 18:02                       ` Will McVicker
2021-10-01  4:04             ` Christoph Hellwig
2021-10-01  4:52     ` Olof Johansson
2021-10-01  5:23       ` Saravana Kannan
2021-10-01  5:35         ` Olof Johansson
2021-10-01  5:59           ` Will McVicker
2021-10-01  8:01             ` Krzysztof Kozlowski
2021-10-01  6:02           ` Saravana Kannan
2021-10-01  6:27             ` Olof Johansson
2021-10-01  6:30               ` Olof Johansson
2021-10-01 12:00             ` Arnd Bergmann [this message]
2021-10-01 12:31               ` Lee Jones
2021-10-01 15:43                 ` Olof Johansson
2021-10-01 11:38           ` Linus Walleij
2021-10-01 11:59           ` Geert Uytterhoeven
2021-10-01 15:59             ` Olof Johansson
2021-10-01 16:51               ` Will McVicker
2021-10-01 17:15                 ` Olof Johansson
2021-10-01 17:48                   ` Will McVicker
2021-10-01  8:19         ` Geert Uytterhoeven
2021-10-01  9:00           ` Arnd Bergmann
2021-10-01 15:27             ` Olof Johansson
2021-10-01 19:26               ` Saravana Kannan
2021-10-02  1:47                 ` Tomasz Figa
2021-10-02 21:03                 ` Olof Johansson

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=CAK8P3a1HtDoEDeqs42s1hDzCZMwU7MhudJ7TVONn6TjoijaWRw@mail.gmail.com \
    --to=arnd@arndb.de \
    --cc=a.zummo@towertech.it \
    --cc=alexandre.belloni@bootlin.com \
    --cc=catalin.marinas@arm.com \
    --cc=cw00.choi@samsung.com \
    --cc=geert@linux-m68k.org \
    --cc=john.stultz@linaro.org \
    --cc=kernel-team@android.com \
    --cc=krzysztof.kozlowski@canonical.com \
    --cc=lee.jones@linaro.org \
    --cc=linus.walleij@linaro.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-clk@vger.kernel.org \
    --cc=linux-gpio@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-rtc@vger.kernel.org \
    --cc=linux-samsung-soc@vger.kernel.org \
    --cc=linux@armlinux.org.uk \
    --cc=mturquette@baylibre.com \
    --cc=olof@lixom.net \
    --cc=s.nawrocki@samsung.com \
    --cc=saravanak@google.com \
    --cc=sboyd@kernel.org \
    --cc=tglx@linutronix.de \
    --cc=tomasz.figa@gmail.com \
    --cc=will@kernel.org \
    --cc=willmcvicker@google.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).