[Debian] overlayfs after switch_root

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http://ubuntuforums.org – I'm trying to get overlayfs working. I patched the kernel and the overlay seems to work in initramfs but as soon as I issue switch_root I lose the overlay. Here is my initramfs init: Code: #!/bin/busybox sh # Mount the /proc and /sys filesystems. mount -t proc none /proc mount -t sysfs none /sys echo "Welcome to BUSYBOX!" mount -o ro /dev/mmcblk0p2 /mnt/root mount -t tmpfs tmpfs /overlay mount -t overlayfs overlayfs -o lowerdir=/mnt/root,upperdir=/overlay /mnt/ro # Clean up. #umount /proc #umount /sys exec switch_root /mnt/ro /sbin/init /mnt/root and /ove (Hardware)