Messages in this thread | | | Subject | Re: linux kernel without file system | From | Xavier Bestel <> | Date | Wed, 14 Jan 2009 10:52:24 +0100 |
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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 there.
Xav
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