On Thu, May 13, 2010 at 11:32:17PM +0800, lei yang wrote:
> On Thu, May 13, 2010 at 8:35 PM, Pasi Kärkkäinen <[1]pasik@xxxxxx> wrote:
>
> On Thu, May 13, 2010 at 04:40:33PM +0800, lei yang wrote:
> > Hi all
> >
> > If I use nfsroot boot the xen dom0, I find it works well if not use
> > initrd-2.6.32.9.img.
> >
> > what does "initrd-2.6.32.9.img" contains?
> >
>
> It's the "initial ramdisk" for Linux kernel. It contains (some) driver
> modules for the kernel,
> and a script to load them and to mount the actual root filesystem and
> switch to it.
>
> All the distros nowadays compile drivers as modules (ie. not included in
> the kernel itself),
> and use the initrd image to load only the needed/required drivers at
> boot time.
>
>
>
> Thanks Pasi, I have another question, why we need this initrd ramdisk,
> because we can put the kernel module in the dir "/lib" of rootfs, if we
> ignor the initrd, it should work
>
Because you can't access the rootfs before you have the drivers loaded!!
initrd contains the drivers required to access the *rootfs*.
-- Pasi
> Lei
>
>
>
> -- Pasi
>
> --
> "We learn from failure, not from success!"
>
> References
>
> Visible links
> 1. mailto:pasik@xxxxxx
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