Re: initramfs: is it supposed to work?

[H. Peter Anvin]

Followup to:  <pan.2005.01.01.15.40.12.264342@xxxxxxxxxxxxxxx>
By author:    Andreas Jellinghaus <aj@xxxxxxxxxxxxxxx>
In newsgroup: linux.dev.kernel
>
> Hi,
> 
> run-init seems to mount the new root, rm files in the old root,
> mount, chroot, open the console, exec. any reason we can't do
> that in shell script commands?
>  
> > You don't pivot_root initramfs, because initramfs *IS* rootfs.
> > 
> > Instead, use the run-init program
> 
> ok, but still: is it ok for the kernel to die?
> after all pivot_root works fine, unless /initrd is unmounted.
> what exactly is the kernel internal that makes pivot_root special?
> 

Your /initrd here is rootfs, and by unmounting rootfs, you've pulled
the rug out from underneath the kernel any time it needs to spawn a
kernel thread.

	-hpa
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