Re: RAM based filesystem in uclinux

I am using Linux kernel version 2.4...Whether initramfs is available in
that kernel version 2.4 with cpio archieve.
DO I need to select initrd or ramdisk with initramfs?

I am sorry I am new to uclinux/linux. I am building myself in uclinux

Thanks
Ashish Phogat

On Fri, Mar 22, 2013 at 9:41 AM, Lennart Sorensen <
[email protected]> wrote:

> On Fri, Mar 22, 2013 at 09:28:18AM -0400, Ashish Phogat wrote:
> > Hi folks,
> > I have some basic problem:
> >
> > I have my uclinux currently running on Coldfire board from RAM. I have
> > romfs as my file system but that is read only file system.I donot enable
> > MTD support, blckmem is also disabled.
> >
> > I enabled a RAM disk(CONFIG_BLK_DEV_RAM) and
> initrd(CONFIG_BLK_DEV_INITRD)
> > and choose rootfs as my filesystem.
> >
> >
> > Now I want to change my configuration so that I have a writable
> filesystem
> > in RAM.
> >
> > I am confused with the configurations I need to set to choose a writable
> > file system for uclinux running from RAM.
> >
> > What uclinux configuration I need to select to boot uclinux in RAM with
> > writeable filesystem?
> >
> > I guess I donot need MTD because that is used for FLASH memory, Neither I
> > need blckmen that is also for FLASH memory. I need to just create a block
> > on RAM and just put a filesystem on that block.
> >
> > Please correct me if I am wrong.
> >
> > Please also proivde the reason which and why a particular configuration
> is
> > enabled. What role the config is playing in writeable filesystem?
> > Thanks a lot for replying
>
> We use initramfs and a cpio archive joined with the kernel in a multipart
> uImage.  Works great.  In the case of busybox and other multicall binaries,
> using hardlinks uses vastly less ram than symlinks (each symlink uses
> one page of ram to store the symlink file).
>
> The fact we can recreate the cpio archive and update the uImage from
> the kernel and cpio archive is great.  No recompile crap to deal with
> the way romfs and such have tended to need.  For us building the kernel
> and the filesystem are totally seperate issues.
>
> --
> Len Sorensen
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