Re: [OS-BUILD PATCHv2] [redhat] configs: Compress kernel with zstd cleanup

[Jeremy Linton (via Email Bridge)]

From: Jeremy Linton on gitlab.com
https://gitlab.com/cki-project/kernel-ark/-/merge_requests/3460#note_2229168...

So, its not possible to turn this on with PPC at the moment without upstream
kernel changes. S390x is a different story, and the zstd builds do work (at
least in qemu), but when tracking back the commit which enables it there was a
comment that they are slower on real HW (z15+) because its providing a
hardware zlib decompressor. So, it is a case of slower decompression to save a
few percent disk space, which I guess probably isn't a good tradeoff on that
platform.