Oh, wait, I may have misunderstood you. So you have originally flashed the image generated with Image Builder with CONFIG_TARGET_ROOTFS_PARTSIZE=1024 parameter and you're trying to run asu on that?
Can you not use the image builder again to generate the new image?
rootfs_size_mb integer
example: 100
maximum: 100
minimum: 1
Ability to specify a custom CONFIG_TARGET_ROOTFS_PARTSIZE for the resulting image. Attaching this optional parameter will cause ImageBuilder to build a rootfs with that size in MB.
Is there any reason, why the 100mb limit on the asu servers for ext4 builds are not increased at least a bit to 200 or 300mb, just to give some breathing room ? I know it can be used to ddos the build server if using squashfs due to the compression cpu cost. However for ext4 it does not matter much.