rootfs image is not initramfs (write error); looks like an initrd

Hello,

    I have the following situation on imx6ul platforms: trying to modify the default u-boot settings for KERNEL load addr in order to free more memory for the second OS that runs on core #1.

    So I modified kernel load/entry from 0x10008000 t o0x20008000 and ramdisk load/entry from 0x18000000 to 0x28000000. RAM size is 1GB

    But my kernel crashed now with the following issue:

  0.510417] Trying to unpack rootfs image as initramfs...
[ 3.436372] rootfs image is not initramfs (write error); looks like an initrd
[ 3.443581] /initrd.image: incomplete write (-28 != 50405002)
[ 3.501259] Freeing initrd memory: 49224K (8c2e8000 - 8f2fa000)

.....................................................................................................................................

4.034506] RAMDISK: Couldn't find valid RAM disk image starting at 0.
[ 4.041137] VFS: Cannot open root device "(null)" or unknown-block(0,0): error -6
[ 4.048615] Please append a correct "root=" boot option; here are the available partitions:

I have tried to add ramdisk_size parameter in kernel bootargs to 50405002 as suggested in other posts but the crash is still happening.

Does anybody have any suggestion on how to fix this issue?

Thanks,

      Mihaita