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    SubjectRe: linux kernel without file system

    On Wed, 2009-01-14 at 10:34 +0100, Philippe De Muyter wrote:
    > On Wed, Jan 14, 2009 at 09:46:48AM +0100, Tomasz Chmielewski wrote:
    > >> I need to design a very small embedded system that must only control
    > >> one ethernet port and two serial lines and must fit in a very small flash
    > >> memory. So I thought about replacing the call to /etc/init by my
    > >> application
    > >> program and removing all the file-system part of linux.
    > >> Is that doable ?
    > >> Is there a 'standard' way of doing that ?
    > >> The first problem I see is accessing my serial lines. How could I do that
    > >> without using open("/dev/ttySx"), which requires a file system ?
    > >> Is there a way to access devices that does not require a file-system ?
    > >
    > > You could put everything in initramfs (and embed it in the kernel).
    > Actually, I was thinking about reducing the footprint of my kernel by
    > removing all the fs-related system calls, so the problem is not where
    > the file-system is, but how to access (serial) devices without giving their
    > "/dev/..." name.

    You can still mount sysfs somewhere and access the device nodes from


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