On Tue, 31 Jan 2023 08:36:15 +0530, Sourabh Jain wrote:

On Systems where online memory is lesser compared to max memory, the
kexec_file_load system call may fail to load the kdump kernel with the
below errors:

    "Failed to update fdt with linux,drconf-usable-memory property"
    "Error setting up usable-memory property for kdump kernel"

[...]

Applied to powerpc/fixes.

[1/1] powerpc/kexec_file: account hot-pluggable memory while estimating FDT size
      https://git.kernel.org/powerpc/c/fc546faa559538fb312c77e055243ece18ab3288

cheers