Re: tests to reduce memory

[sferriol <sylvain.ferriol@imag.fr>]

Joey Hess a écrit :
> sferriol wrote:
>
> > i make different modifications to pass the test:
> > 1) i use cpio in rootskel/src-bootfloppy/init
> > this avoid to use loop module, and to double memory used
> > see di-rootskel-bootfloppy-cpio.diff.gz
> > and in busybox/config-floppy-udeb-linux, i activate only:
> > CONFIG_CPIO=y
> > CONFIG_GUNZIP=y
> >
> > i do not test it with a bootfloppy and a usb key.
> > and the root initrd floppy/usb must be a cpio archive
> > i think if we can put 2.6 on floppy, it will be more easier
> > so this option is just a draft
>
>
> Well, that won't work for floppy+usb for sure, since the initrd on the
> usb key needs to be something the 2.4 kernel can boot. Going with 2.6 on
> a floppy would be nice, but I cannot get it to fit, can you?
i found a first solution to put 2.6.15 on floppy
try:
http://www-timc.imag.fr/Sylvain.Ferriol/debian/

there is no rootskel/src-bootfloppy in boot.img, only the kernel
and i ask the kernel to load root.imd directly in RAM. But we will not 
have floppy+usb option because root.img is a cramfs filesystem. As all 
kernels have cramfs, we do not have to load fat,loop,... modules.
the only constraint is to add floppy driver in kernel
CONFIG_BLK_DEV_FD=y

i only build boot and root image, it's a very alpha release. i just test 
kernel to boot and load the root image, that's all. i do not test all 
install
i have to build net and cd drivers floppies in cramfs too, and test

the other advantage is to have free space on boot image for next kernel 
release because as i see, the size is always growing up ;)

now, i try to build config files boot-2.6.cfg and root-2.6.cfg

i'm not a kernel expert so any comments on other arch is welcome :)

sylvain

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