Anyone was able to configure extroot on any other partition than default one on raspberry ?
I tried as mentioned here on mmcblk0p3 and on external USB /dev/sda1 but without success.
I found topic Expanding OpenWrt squashfs image? (SDcard) - #11 by pierrehavelaar
which leads to https://bugs.openwrt.org/index.php?do=details&task_id=2231