[klibc] only pivot_root supported? [signed]

[Andreas Jellinghaus [c]]

Hi,

I hope this is the right list for initramfs questions.

First I noticed: with initrd I can use real-root-device and pivot_root
mechanisms. with initramfs only pivot_root works. My init (or linuxrc)
scripts end like this:

mount -t xfs -n -o ro /dev/mapper/root /new-root

umount -n /sys || true
umount -n /dev || true
umount -n /proc || true

cd /new-root
pivot_root . initrd
exec chroot . /sbin/init < dev/console > dev/console 2>&1

(works) or

echo 0xfd00 > /proc/sys/kernel/real-root-dev
umount -n /sys || true
umount -n /dev || true
umount -n /proc || true

(does't work)

if my observation is correct, it might be nice to document this
in Documentation/early-userspace/

Andreas


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