Last night while working on KLV I decided to put the blade server through some paces and in the meanwhile compile a kernel.
So I set up with the latest "testing" branch kernel-kit and during the configuration stage, enabled built in overlayfs, added support for parallel and serial ports and virtualization, PREEMPT is selected and some clock speed adjustments made. The AUFS patches are applied. I enabled quite a few new features in this kernel. Using a Puppy Linux Bionic64 with a 4.19.82-rt30 full real time kernel booted to do the compiling, I only half way expected it to build successfully.........
Well it did! Finished normally and in around 35 minutes. So with this new,really stuffed full of features kernel, I went to try to boot it in KLV-Airedale-beta3 but failed with kernel panic. Tried to boot the 5.16.12 in Puppy Linux Bionic64, also kernel panic. Tried in a Fossapup64 and kernel panic. The error messages indicate problems with file system layering, though not 100% sure if this is really the only problem. I noticed also overall there are MANY new features added in the kernel configuration.
I might make it available to see if anyone is interested in seeing if it will boot for them on some other hardware.