Comment # 6 on bug 1196060 from Tony Jones

rguenther so looking at elfutils I see: "checking for zstd... no"

is this an issue since kernel-default is packaging ko's with .zst suffix

# rpm -ql kernel-default | grep ext4
/usr/lib/modules/5.16.10-1-default/kernel/fs/ext4
/usr/lib/modules/5.16.10-1-default/kernel/fs/ext4/ext4.ko.zst

This isn't the issue for this bug as systemtap/elfutils should be opening
/usr/lib/debug/usr/lib/modules/5.16.10-1-default/kernel/fs/ext4/ext4.ko.debug
from kernel-default-debuginfo

However 'strace stap --poison-cache -l
'module("ext4").function("write_mmp_block")'

shows it's not accessing this debug file at all.

build-id is consistent which has been a cause of these issues before

# eu-readelf -a
/usr/lib/debug/usr/lib/modules/5.16.10-1-default/kernel/fs/ext4/ext4.ko.debug |
grep -A 1 GNU_BUILD_ID
  GNU                   20  GNU_BUILD_ID
    Build ID: 771c20d08943980047dc325b9101eb04164d1956

# eu-readelf -a /lib/modules/5.16.10-1-default/kernel/fs/ext4/ext4.ko.zst |
grep -A 1 GNU_BUILD_ID
eu-readelf: failed reading
'/lib/modules/5.16.10-1-default/kernel/fs/ext4/ext4.ko.zst': not a valid ELF
file

# eu-readelf -a /lib/modules/5.16.10-1-default/kernel/fs/ext4/ext4.ko | grep -A
1 GNU_BUILD_ID
  GNU                   20  GNU_BUILD_ID
    Build ID: 771c20d08943980047dc325b9101eb04164d1956


Hmmn.  I shall keep investigating.

This is an issue on Factory and SP4.