From: Baoquan He on gitlab.com https://gitlab.com/cki-project/kernel-ark/-/merge_requests/1171#note_6035962...
And about the crashkernel value, we may need increase the lowest value from 160M to a larger value, e.g 192M. When checked CKI failure of kdump test case, I found the kernel itself has been enlarged a little to 40M+.
And worse, I found since kernel-5.13.0-0.rc4.20210603git324c92e5e0ee.34, bss of kernel increased from 5M to 22M, this surely need be figured out what happened. RHEL9 kernel seems to be larger than rhel8, increasing the crashkernel value a little bit could be safer.