Kristian Kielhofner <k...@kriskinc.com> [2012-07-03 14:37:06]:
> Is /overlay supported on x86? Am I missing something here?
Hi,
I think, that you need to rephrase your question to something like "Is /overlay
supported with initramfs?".
If you look at mount.sh and closely at the function config_mount_by_section()
then you'll see following:
if [ "$find_rootfs" = "1" ]; then
if [ "$is_rootfs" -eq 1 ]; then
target=/overlay
elif [ "$target" = "/" ]; then
target=/rom
fi
else
if [ "$is_rootfs" -eq 1 ] || [ "$target" = "/overlay" ]; then
target=/tmp/overlay-disabled
elif [ "$target" = "/" ] || [ "$target" = "/rom" ]; then
target="/tmp/whole_root-disabled"
fi
fi
So to get your overlay mounted as /overlay you need to fulfil following
conditions: $find_rootfs=1 and $is_rootfs=1. How to accomplish that?
$find_rootfs=1 is set to 1 in 50_determine_usb_root script:
determine_external_root() {
...
[ "$root_device" = "/dev/root" ] && {
...
config_foreach config_mount_by_section mount 1
...
}
}
As you can see, $find_rootfs=1 is only set when root_device=/dev/root which is
not your case probably (it's probably because of initramfs?). And $is_rootfs=1
is set in uci config. Hope it helps :)
-- ynezz
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