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Tue, 16 Sep 2025 05:13:32 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 X-ThreadId: ADclxERWIs8s Date: Tue, 16 Sep 2025 11:13:03 +0200 From: "Arnd Bergmann" To: "Willy Tarreau" Cc: "Ash Logan" , "Christophe Leroy" , "linuxppc-dev@lists.ozlabs.org" , "linux-kernel@vger.kernel.org" , officialTechflashYT@gmail.com, "A. Wilcox" , "Michael Ellerman" Message-Id: In-Reply-To: <20250916070052.GA3616@1wt.eu> References: <3e8cb683-a084-4847-8f69-e1f4d9125c45@heyquark.com> <432e049f-886d-4734-ad59-52569a796046@app.fastmail.com> <11e667d6-2210-47f0-a9ec-a134a60e138c@heyquark.com> <39164c56-78f8-4bac-acd2-a996149c1c57@app.fastmail.com> <20250916070052.GA3616@1wt.eu> Subject: Re: 32-bit HIGHMEM and game console downstreams Content-Type: text/plain Content-Transfer-Encoding: 7bit On Tue, Sep 16, 2025, at 09:00, Willy Tarreau wrote: > On Tue, Sep 16, 2025 at 08:20:35AM +0200, Arnd Bergmann wrote: >> > The maintainer of that downstream claims to be able to boot modern >> > text-mode distros on the GameCube' 24MB, which I find really impressive! >> >> On a simpler musl+busybox userland and even more feature reduced >> kernel (no network, initramfs-only) I could get to ~10MB, but then it >> doesn't really do anything besides showing a shell. > > When you build your systems from source and install only the necessary > *files* (not packages) you can get much lower. Here's my reverse-proxy > for example (aarch64): > > $ df / > Filesystem 1K-blocks Used Available Use% Mounted on > /dev/ram0 11520 11520 0 100% / Yes, that was what I did in my busybox example, which used a tiny initramfs in the end. Your ramdisk itself is already bigger than my total 10MB RAM here, but then it also does one thing instead of nothing. Arnd