linux-kernel - Re: [RFC][PATCH 0/1] ep93xx: clock: convert in-place

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Message-ID: <CACRpkdYkb+-y366esEDZBDMNQ7s6zOfHEPotNaTUi3m95QrBFw@mail.gmail.com>
Date:   Tue, 25 May 2021 12:19:27 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Nikita Shubin <nikita.shubin@...uefel.me>
Cc:     Russell King <linux@...linux.org.uk>,
        Hartley Sweeten <hsweeten@...ionengravers.com>,
        Alexander Sverdlin <alexander.sverdlin@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Ard Biesheuvel <ardb@...nel.org>,
        Mike Rapoport <rppt@...nel.org>,
        Gregory Fong <gregory.0xf0@...il.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        YiFei Zhu <yifeifz2@...inois.edu>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RFC][PATCH 0/1] ep93xx: clock: convert in-place

On Tue, May 25, 2021 at 10:36 AM Nikita Shubin
<nikita.shubin@...uefel.me> wrote:

>    text    data     bss     dec     hex filename
> 4491689  920748   92840 5505277  5400fd vmlinux
(...)
>    text    data     bss     dec     hex filename
> 4534485  927424   90304 5552213  54b855 vmlinux

So IIUC that is 49472 bytes more text & data? ~48KB.

I think what really matters is the 2MB limit on compressed
kernel size, which I guess can be pushed a bit by
compressing the kernel with something violent like ZST but
ultimately what EP93xx might want to do is to do what
the other SoCs are doing for accommodating Android: move
out as many drivers as possible to be modules and
not compiled into the static kernel. Do we have candidates
for that? Are people normally using modules on EP93xx?

I am  modernizing XScale IXP4xx and it doesn't suffer
from this as much: even the really ancient NSLU2 has
32MB of RAM.

Yours,
Linus Walleij